Merge branch '4.8' of git://gitorious.org/qt/qt into 4.8

25 files changed, 827 insertions, 350 deletions

diff --git a/src/gui/embedded/embedded.pri b/src/gui/embedded/embedded.pri
index 31f0bc6..836c116 100644
--- a/src/gui/embedded/embedded.pri
+++ b/src/gui/embedded/embedded.pri
@@ -117,7 +117,7 @@ embedded {
         contains( gfx-drivers, qnx ) {
                 HEADERS += embedded/qscreenqnx_qws.h
                 SOURCES += embedded/qscreenqnx_qws.cpp
-                LIBS += -lgf
+                LIBS_PRIVATE += -lgf
         }
 
         contains( gfx-drivers, integrityfb ) {
diff --git a/src/gui/embedded/qkbdqnx_qws.cpp b/src/gui/embedded/qkbdqnx_qws.cpp
index 5a8118d..ad76446 100644
--- a/src/gui/embedded/qkbdqnx_qws.cpp
+++ b/src/gui/embedded/qkbdqnx_qws.cpp
@@ -40,16 +40,16 @@
 ****************************************************************************/
 
 #include "qkbdqnx_qws.h"
-#include "QtCore/qsocketnotifier.h"
+
+#include "qplatformdefs.h"
+#include "qsocketnotifier.h"
+#include "private/qcore_unix_p.h"
 #include "QtCore/qdebug.h"
 
 #include <sys/dcmd_input.h>
-#include <photon/keycodes.h>
-
-#include "qplatformdefs.h"
+#include <sys/keycodes.h>
 #include <errno.h>
 
-
 QT_BEGIN_NAMESPACE
 
 /*!
@@ -72,7 +72,7 @@ QT_BEGIN_NAMESPACE
 
     Example invocation from command line: \c{/usr/photon/bin/devi-hid -Pr kbd mouse}
     Note that after running \c{devi-hid}, you will not be able to use the local
-    shell anymore. It is suggested to run the command in a shell scrip, that launches
+    shell anymore. It is suggested to run the command in a shell script, that launches
     a Qt application after invocation of \c{devi-hid}.
 
     To make \l{Qt for Embedded Linux} explicitly choose the qnx keyboard
@@ -100,15 +100,13 @@ QWSQnxKeyboardHandler::QWSQnxKeyboardHandler(const QString &device)
                          QT_OPEN_RDONLY);
     if (keyboardFD == -1) {
         qErrnoWarning(errno, "QWSQnxKeyboardHandler: Unable to open device");
-        return;
-    }
-
-    // create a socket notifier so we'll wake up whenever keyboard input is detected.
-    QSocketNotifier *notifier = new QSocketNotifier(keyboardFD, QSocketNotifier::Read, this);
-    connect(notifier, SIGNAL(activated(int)), SLOT(socketActivated()));
-
-    qDebug() << "QWSQnxKeyboardHandler: connected.";
+    } else {
+        // create a socket notifier so we'll wake up whenever keyboard input is detected.
+        QSocketNotifier *notifier = new QSocketNotifier(keyboardFD, QSocketNotifier::Read, this);
+        connect(notifier, SIGNAL(activated(int)), SLOT(socketActivated()));
 
+        qDebug("QWSQnxKeyboardHandler: connected.");
+    }
 }
 
 /*!
@@ -116,7 +114,16 @@ QWSQnxKeyboardHandler::QWSQnxKeyboardHandler(const QString &device)
  */
 QWSQnxKeyboardHandler::~QWSQnxKeyboardHandler()
 {
-    QT_CLOSE(keyboardFD);
+    if (keyboardFD != -1)
+        QT_CLOSE(keyboardFD);
+}
+
+// similar to PhKeyToMb
+static inline bool key_sym_displayable(unsigned long sym)
+{
+    if (sym >= 0xF000)
+        return sym >= 0xF100 && (sizeof(wchar_t) > 2 || sym < 0x10000);
+    return (sym & ~0x9F) != 0; // exclude 0...0x1F and 0x80...0x9F
 }
 
 /*! \internal
@@ -136,6 +143,11 @@ void QWSQnxKeyboardHandler::socketActivated()
     // the bytes read must be the size of a keyboard packet
     Q_ASSERT(bytesRead == sizeof(_keyboard_packet));
 
+    if (packet.data.flags & KEY_SYM_VALID_EX)
+        packet.data.flags |= KEY_SYM_VALID;
+    else if (!(packet.data.flags & (KEY_SYM_VALID | KEY_CAP_VALID)))
+        return;
+
 #if 0
     qDebug() << "keyboard got scancode"
              << hex << packet.data.modifiers
@@ -145,86 +157,157 @@ void QWSQnxKeyboardHandler::socketActivated()
              << packet.data.key_scan;
 #endif
 
-    // QNX is nice enough to translate the raw keyboard data into a QNX data structure
+    // QNX is nice enough to translate the raw keyboard data into generic format for us.
     // Now we just have to translate it into a format Qt understands.
 
-    // figure out whether it's a press
-    bool isPress = packet.data.key_cap & KEY_DOWN;
-    // figure out whether the key is still pressed and the key event is repeated
-    bool isRepeat = packet.data.key_cap & KEY_REPEAT;
-
-    Qt::Key key = Qt::Key_unknown;
-    int unicode = 0xffff;
-
-    // TODO - this switch is not complete!
-    switch (packet.data.key_scan) {
-    case KEYCODE_SPACE: key = Qt::Key_Space; unicode = 0x20; break;
-    case KEYCODE_F1: key = Qt::Key_F1; break;
-    case KEYCODE_F2: key = Qt::Key_F2; break;
-    case KEYCODE_F3: key = Qt::Key_F3; break;
-    case KEYCODE_F4: key = Qt::Key_F4; break;
-    case KEYCODE_F5: key = Qt::Key_F5; break;
-    case KEYCODE_F6: key = Qt::Key_F6; break;
-    case KEYCODE_F7: key = Qt::Key_F7; break;
-    case KEYCODE_F8: key = Qt::Key_F8; break;
-    case KEYCODE_F9: key = Qt::Key_F9; break;
-    case KEYCODE_F10: key = Qt::Key_F10; break;
-    case KEYCODE_F11: key = Qt::Key_F11; break;
-    case KEYCODE_F12: key = Qt::Key_F12; break;
-    case KEYCODE_BACKSPACE: key = Qt::Key_Backspace; break;
-    case KEYCODE_TAB: key = Qt::Key_Tab; break;
-    case KEYCODE_RETURN: key = Qt::Key_Return; break;
-    case KEYCODE_KP_ENTER: key = Qt::Key_Enter; break;
-    case KEYCODE_UP:
-    case KEYCODE_KP_UP:
-        key = Qt::Key_Up; break;
-    case KEYCODE_DOWN:
-    case KEYCODE_KP_DOWN:
-        key = Qt::Key_Down; break;
-    case KEYCODE_LEFT:
-    case KEYCODE_KP_LEFT:
-        key = Qt::Key_Left; break;
-    case KEYCODE_RIGHT:
-    case KEYCODE_KP_RIGHT:
-        key = Qt::Key_Right; break;
-    case KEYCODE_HOME:
-    case KEYCODE_KP_HOME:
-        key = Qt::Key_Home; break;
-    case KEYCODE_END:
-    case KEYCODE_KP_END:
-        key = Qt::Key_End; break;
-    case KEYCODE_PG_UP:
-    case KEYCODE_KP_PG_UP:
-        key = Qt::Key_PageUp; break;
-    case KEYCODE_PG_DOWN:
-    case KEYCODE_KP_PG_DOWN:
-        key = Qt::Key_PageDown; break;
-    case KEYCODE_INSERT:
-    case KEYCODE_KP_INSERT:
-        key = Qt::Key_Insert; break;
-    case KEYCODE_DELETE:
-    case KEYCODE_KP_DELETE:
-        key = Qt::Key_Delete; break;
-    case KEYCODE_ESCAPE:
-        key = Qt::Key_Escape; break;
-    default: // none of the above, try the key_scan directly
-        unicode = packet.data.key_scan;
-        break;
-    }
-
     // figure out the modifiers that are currently pressed
     Qt::KeyboardModifiers modifiers = Qt::NoModifier;
-    if (packet.data.flags & KEYMOD_SHIFT)
+    if (packet.data.modifiers & KEYMOD_SHIFT)
         modifiers |= Qt::ShiftModifier;
-    if (packet.data.flags & KEYMOD_CTRL)
+    if (packet.data.modifiers & KEYMOD_CTRL)
         modifiers |= Qt::ControlModifier;
-    if (packet.data.flags & KEYMOD_ALT)
+    if (packet.data.modifiers & KEYMOD_ALT)
         modifiers |= Qt::AltModifier;
+    if (packet.data.modifiers & KEYMOD_NUM_LOCK)
+        modifiers |= Qt::KeypadModifier;
+#if 0
+    // special case for AltGr
+    if (packet.data.modifiers & KEYMOD_ALTGR)
+        key = Qt::Key_AltGr;
+#endif
+
+    // figure out whether it's a press
+    bool isPress = packet.data.flags & KEY_DOWN;
+    // figure out whether the key is still pressed and the key event is repeated
+    bool isRepeat = packet.data.flags & KEY_REPEAT;
+
+    int key = Qt::Key_unknown;
+    int unicode = 0;
+
+    if (((packet.data.flags & KEY_SYM_VALID) && key_sym_displayable(unicode = packet.data.key_sym))
+        || ((packet.data.flags & KEY_CAP_VALID) && key_sym_displayable(unicode = packet.data.key_cap))) {
+        if (unicode <= 0x0ff) {
+            if (unicode >= 'a' && unicode <= 'z')
+                key = Qt::Key_A + unicode - 'a';
+            else
+                key = unicode;
+        }
+        // Ctrl<something> or Alt<something> is not a displayable character
+        if (modifiers & (Qt::ControlModifier | Qt::AltModifier))
+            unicode = 0;
+    } else {
+        unicode = 0;
+
+        unsigned long sym = 0;
+        if (packet.data.flags & KEY_SYM_VALID)
+            sym = packet.data.key_sym;
+        else if (packet.data.flags & KEY_CAP_VALID)
+            sym = packet.data.key_cap;
 
-    // if the unicode value is not ascii, we ignore it.
-    // TODO - do a complete mapping between all QNX scan codes and Qt codes
-    if (unicode != 0xffff && !isascii(unicode))
-        return; // unprintable character
+        switch (sym) {
+        case KEYCODE_ESCAPE: key = Qt::Key_Escape; unicode = 27; break;
+        case KEYCODE_TAB: key = Qt::Key_Tab; unicode = 9; break;
+        case KEYCODE_BACK_TAB: key = Qt::Key_Backtab; break;
+        case KEYCODE_BACKSPACE: key = Qt::Key_Backspace; unicode = 127; break;
+        case KEYCODE_RETURN: key = Qt::Key_Return; break;
+        case KEYCODE_KP_ENTER: key = Qt::Key_Enter; break;
+        case KEYCODE_INSERT:
+        case KEYCODE_KP_INSERT:
+            key = Qt::Key_Insert; break;
+        case KEYCODE_KP_DELETE:
+            if (modifiers & Qt::KeypadModifier) {
+                key = Qt::Key_Comma;
+                break;
+            }
+        // fall through
+        case KEYCODE_DELETE:
+            key = Qt::Key_Delete; break;
+        case KEYCODE_PAUSE:
+        case KEYCODE_BREAK:
+            if (modifiers & (Qt::ControlModifier | Qt::AltModifier))
+                return; // sometimes occurs at the middle of a key sequence
+            key = Qt::Key_Pause; break;
+        case KEYCODE_PRINT:
+            if (modifiers & (Qt::ControlModifier | Qt::AltModifier))
+                return; // sometimes occurs at the middle of a key sequence
+            key = Qt::Key_Print; break;
+        case KEYCODE_SYSREQ:
+            key = Qt::Key_SysReq; break;
+        case KEYCODE_HOME:
+        case KEYCODE_KP_HOME:
+            key = Qt::Key_Home; break;
+        case KEYCODE_END:
+        case KEYCODE_KP_END:
+            key = Qt::Key_End; break;
+        case KEYCODE_LEFT:
+        case KEYCODE_KP_LEFT:
+            key = Qt::Key_Left; break;
+        case KEYCODE_UP:
+        case KEYCODE_KP_UP:
+            key = Qt::Key_Up; break;
+        case KEYCODE_RIGHT:
+        case KEYCODE_KP_RIGHT:
+            key = Qt::Key_Right; break;
+        case KEYCODE_DOWN:
+        case KEYCODE_KP_DOWN:
+            key = Qt::Key_Down; break;
+        case KEYCODE_PG_UP:
+        case KEYCODE_KP_PG_UP:
+            key = Qt::Key_PageUp; break;
+        case KEYCODE_PG_DOWN:
+        case KEYCODE_KP_PG_DOWN:
+            key = Qt::Key_PageDown; break;
+
+        case KEYCODE_LEFT_SHIFT:
+        case KEYCODE_RIGHT_SHIFT:
+            key = Qt::Key_Shift; break;
+        case KEYCODE_LEFT_CTRL:
+        case KEYCODE_RIGHT_CTRL:
+            key = Qt::Key_Control; break;
+        case KEYCODE_LEFT_ALT:
+        case KEYCODE_RIGHT_ALT:
+            key = Qt::Key_Alt; break;
+        case KEYCODE_CAPS_LOCK:
+            key = Qt::Key_CapsLock; break;
+        case KEYCODE_NUM_LOCK:
+            key = Qt::Key_NumLock; break;
+        case KEYCODE_SCROLL_LOCK:
+            key = Qt::Key_ScrollLock; break;
+
+        case KEYCODE_F1:
+        case KEYCODE_F2:
+        case KEYCODE_F3:
+        case KEYCODE_F4:
+        case KEYCODE_F5:
+        case KEYCODE_F6:
+        case KEYCODE_F7:
+        case KEYCODE_F8:
+        case KEYCODE_F9:
+        case KEYCODE_F10:
+        case KEYCODE_F11:
+        case KEYCODE_F12:
+            key = Qt::Key_F1 + sym - KEYCODE_F1; break;
+
+        case KEYCODE_MENU: key = Qt::Key_Menu; break;
+        case KEYCODE_LEFT_HYPER: key = Qt::Key_Hyper_L; break;
+        case KEYCODE_RIGHT_HYPER: key = Qt::Key_Hyper_R; break;
+
+        case KEYCODE_KP_PLUS: key = Qt::Key_Plus; break;
+        case KEYCODE_KP_MINUS: key = Qt::Key_Minus; break;
+        case KEYCODE_KP_MULTIPLY: key = Qt::Key_multiply; break;
+        case KEYCODE_KP_DIVIDE: key = Qt::Key_Slash; break;
+        case KEYCODE_KP_FIVE:
+            if (!(modifiers & Qt::KeypadModifier))
+                key = Qt::Key_5;
+            break;
+
+        default: // none of the above
+            break;
+        }
+    }
+
+    if (key == Qt::Key_unknown && unicode == 0)
+        return;
 
     // call processKeyEvent. This is where all the magic happens to insert a
     // key event into Qt's event loop.
diff --git a/src/gui/embedded/qlock.cpp b/src/gui/embedded/qlock.cpp
index ac15431..eaad15c 100644
--- a/src/gui/embedded/qlock.cpp
+++ b/src/gui/embedded/qlock.cpp
@@ -41,7 +41,6 @@
 
 #include "qlock_p.h"
 
-
 #ifdef QT_NO_QWS_MULTIPROCESS
 
 QT_BEGIN_NAMESPACE
@@ -83,7 +82,7 @@ QT_END_NAMESPACE
 #else // QT_NO_QWS_MULTIPROCESS
 
 #if defined(Q_OS_DARWIN)
-#  define Q_NO_SEMAPHORE
+#  define QT_NO_SEMAPHORE
 #endif
 
 #include "qwssignalhandler_p.h"
@@ -91,11 +90,13 @@ QT_END_NAMESPACE
 #include <unistd.h>
 #include <sys/types.h>
 #include <sys/ipc.h>
-#if defined(Q_NO_SEMAPHORE)
+#if defined(QT_NO_SEMAPHORE)
 #  include <sys/stat.h>
 #  include <sys/file.h>
-#else
+#elif !defined(QT_POSIX_IPC)
 #  include <sys/sem.h>
+#else
+#  include <semaphore.h>
 #endif
 #include <string.h>
 #include <errno.h>
@@ -109,17 +110,24 @@ QT_BEGIN_NAMESPACE
 class QLockData
 {
 public:
-#ifdef Q_NO_SEMAPHORE
+#if defined(QT_NO_SEMAPHORE) || defined(QT_POSIX_IPC)
     QByteArray file;
-#endif // Q_NO_SEMAPHORE
+#endif
+#if !defined(QT_POSIX_IPC)
     int id;
+#else
+    sem_t *id;    // Read mode resource counter
+    sem_t *rsem;  // Read mode lock
+    sem_t *wsem;  // Write mode lock
+#endif
     int count;
     bool owned;
 };
 
+
 /*!
     \class QLock
-    \brief The QLock class is a wrapper for a System V shared semaphore.
+    \brief The QLock class is a wrapper for a system shared semaphore.
 
     \ingroup qws
 
@@ -148,7 +156,7 @@ QLock::QLock(const QString &filename, char id, bool create)
 {
     data = new QLockData;
     data->count = 0;
-#ifdef Q_NO_SEMAPHORE
+#if defined(QT_NO_SEMAPHORE)
     data->file = filename.toLocal8Bit() + id;
     for (int x = 0; x < 2; ++x) {
         data->id = QT_OPEN(data->file.constData(), O_RDWR | (x ? O_CREAT : 0), S_IRWXU);
@@ -157,7 +165,7 @@ QLock::QLock(const QString &filename, char id, bool create)
             break;
         }
     }
-#else
+#elif !defined(QT_POSIX_IPC)
     key_t semkey = ftok(filename.toLocal8Bit().constData(), id);
     data->id = semget(semkey, 0, 0);
     data->owned = create;
@@ -170,6 +178,28 @@ QLock::QLock(const QString &filename, char id, bool create)
         arg.val = MAX_LOCKS;
         semctl(data->id, 0, SETVAL, arg);
     }
+#else
+    data->file = filename.toLocal8Bit() + id;
+    data->owned = create;
+
+    char ids[3] = { 'c', 'r', 'w' };
+    sem_t **sems[3] = { &data->id, &data->rsem, &data->wsem };
+    unsigned short initialValues[3] = { MAX_LOCKS, 1, 1 };
+    for (int i = 0; i < 3; ++i) {
+        QByteArray file = data->file + ids[i];
+        do {
+            *sems[i] = sem_open(file.constData(), 0, 0666, 0);
+        } while (*sems[i] == SEM_FAILED && errno == EINTR);
+        if (create) {
+            if (*sems[i] != SEM_FAILED) {
+                sem_close(*sems[i]);
+                sem_unlink(file.constData());
+            }
+            do {
+                *sems[i] = sem_open(file.constData(), O_CREAT, 0666, initialValues[i]);
+            } while (*sems[i] == SEM_FAILED && errno == EINTR);
+        }
+    }
 #endif
     if (!isValid()) {
         qWarning("QLock::QLock: Cannot %s semaphore %s '%c' (%d, %s)",
@@ -193,17 +223,32 @@ QLock::~QLock()
 
     while (locked())
         unlock();
-#ifdef Q_NO_SEMAPHORE
+
+#if defined(QT_NO_SEMAPHORE)
     if (isValid())
         QT_CLOSE(data->id);
+#elif defined(QT_POSIX_IPC)
+    if (data->id != SEM_FAILED)
+        sem_close(data->id);
+    if (data->rsem != SEM_FAILED)
+        sem_close(data->rsem);
+    if (data->wsem != SEM_FAILED)
+        sem_close(data->wsem);
 #endif
+
     if (data->owned) {
-#ifdef Q_NO_SEMAPHORE
+#if defined(QT_NO_SEMAPHORE)
         unlink(data->file.constData());
-#else
+#elif !defined(QT_POSIX_IPC)
         qt_semun semval;
         semval.val = 0;
         semctl(data->id, 0, IPC_RMID, semval);
+#else
+        char ids[3] = { 'c', 'r', 'w' };
+        for (int i = 0; i < 3; ++i) {
+            QByteArray file = data->file + ids[i];
+            sem_unlink(file.constData());
+        }
 #endif
     }
     delete data;
@@ -216,7 +261,11 @@ QLock::~QLock()
 */
 bool QLock::isValid() const
 {
+#if !defined(QT_POSIX_IPC)
     return data && data->id != -1;
+#else
+    return data && data->id != SEM_FAILED && data->rsem != SEM_FAILED && data->wsem != SEM_FAILED;
+#endif
 }
 
 /*!
@@ -232,21 +281,48 @@ bool QLock::isValid() const
 */
 void QLock::lock(Type t)
 {
+    if (!isValid())
+        return;
+
     if (!data->count) {
         type = t;
 
         int rv;
-#ifdef Q_NO_SEMAPHORE
+#if defined(QT_NO_SEMAPHORE)
         int op = type == Write ? LOCK_EX : LOCK_SH;
 
         EINTR_LOOP(rv, flock(data->id, op));
-#else
+#elif !defined(QT_POSIX_IPC)
         sembuf sops;
         sops.sem_num = 0;
         sops.sem_op = type == Write ? -MAX_LOCKS : -1;
         sops.sem_flg = SEM_UNDO;
 
         EINTR_LOOP(rv, semop(data->id, &sops, 1));
+#else
+        if (type == Write) {
+            EINTR_LOOP(rv, sem_wait(data->rsem));
+            if (rv != -1) {
+                EINTR_LOOP(rv, sem_wait(data->wsem));
+                if (rv == -1)
+                    sem_post(data->rsem);
+            }
+        } else {
+            EINTR_LOOP(rv, sem_wait(data->wsem));
+            if (rv != -1) {
+                EINTR_LOOP(rv, sem_trywait(data->rsem));
+                if (rv != -1 || errno == EAGAIN) {
+                    EINTR_LOOP(rv, sem_wait(data->id));
+                    if (rv == -1) {
+                        int semval;
+                        sem_getvalue(data->id, &semval);
+                        if (semval == MAX_LOCKS)
+                            sem_post(data->rsem);
+                    }
+                }
+                rv = sem_post(data->wsem);
+            }
+        }
 #endif
         if (rv == -1) {
             qDebug("QLock::lock(): %s", strerror(errno));
@@ -265,19 +341,37 @@ void QLock::lock(Type t)
 */
 void QLock::unlock()
 {
-    if (data->count) {
+    if (!isValid())
+        return;
+
+    if (data->count > 0) {
         data->count--;
         if (!data->count) {
             int rv;
-#ifdef Q_NO_SEMAPHORE
+#if defined(QT_NO_SEMAPHORE)
             EINTR_LOOP(rv, flock(data->id, LOCK_UN));
-#else
+#elif !defined(QT_POSIX_IPC)
             sembuf sops;
             sops.sem_num = 0;
             sops.sem_op = type == Write ? MAX_LOCKS : 1;
             sops.sem_flg = SEM_UNDO;
 
             EINTR_LOOP(rv, semop(data->id, &sops, 1));
+#else
+            if (type == Write) {
+                sem_post(data->wsem);
+                rv = sem_post(data->rsem);
+            } else {
+                EINTR_LOOP(rv, sem_wait(data->wsem));
+                if (rv != -1) {
+                    sem_post(data->id);
+                    int semval;
+                    sem_getvalue(data->id, &semval);
+                    if (semval == MAX_LOCKS)
+                        sem_post(data->rsem);
+                    rv = sem_post(data->wsem);
+                }
+            }
 #endif
             if (rv == -1)
                 qDebug("QLock::unlock(): %s", strerror(errno));
diff --git a/src/gui/embedded/qmouselinuxinput_qws.cpp b/src/gui/embedded/qmouselinuxinput_qws.cpp
index efcf6d4..19a9a99 100644
--- a/src/gui/embedded/qmouselinuxinput_qws.cpp
+++ b/src/gui/embedded/qmouselinuxinput_qws.cpp
@@ -135,19 +135,21 @@ void QWSLinuxInputMousePrivate::readMouseData()
     int n = 0;
 
     forever {
-        n = QT_READ(m_fd, reinterpret_cast<char *>(buffer) + n, sizeof(buffer) - n);
-
-        if (n == 0) {
+        int bytesRead = QT_READ(m_fd, reinterpret_cast<char *>(buffer) + n, sizeof(buffer) - n);
+        if (bytesRead == 0) {
             qWarning("Got EOF from the input device.");
             return;
-        } else if (n < 0 && (errno != EINTR && errno != EAGAIN)) {
-            qWarning("Could not read from input device: %s", strerror(errno));
-            return;
-        } else if (n % sizeof(buffer[0]) == 0) {
+        }
+        if (bytesRead == -1) {
+            if (errno != EAGAIN)
+                qWarning("Could not read from input device: %s", strerror(errno));
             break;
         }
-    }
 
+        n += bytesRead;
+        if (n % sizeof(buffer[0]) == 0)
+            break;
+    }
     n /= sizeof(buffer[0]);
 
     for (int i = 0; i < n; ++i) {
diff --git a/src/gui/embedded/qmouseqnx_qws.cpp b/src/gui/embedded/qmouseqnx_qws.cpp
index a9647c0..d0b892e 100644
--- a/src/gui/embedded/qmouseqnx_qws.cpp
+++ b/src/gui/embedded/qmouseqnx_qws.cpp
@@ -39,14 +39,13 @@
 **
 ****************************************************************************/
 
-#include "qplatformdefs.h"
 #include "qmouseqnx_qws.h"
 
+#include "qplatformdefs.h"
 #include "qsocketnotifier.h"
-#include "qdebug.h"
+#include "private/qcore_unix_p.h"
 
 #include <sys/dcmd_input.h>
-
 #include <errno.h>
 
 QT_BEGIN_NAMESPACE
@@ -92,22 +91,28 @@ QT_BEGIN_NAMESPACE
 
     \sa QMouseDriverFactory
  */
-QQnxMouseHandler::QQnxMouseHandler(const QString & /*driver*/, const QString &device)
+QQnxMouseHandler::QQnxMouseHandler(const QString & driver, const QString &device)
+    : QObject(), QWSMouseHandler(driver, device), mouseButtons(Qt::NoButton)
 {
     // open the mouse device with O_NONBLOCK so reading won't block when there's no data
     mouseFD = QT_OPEN(device.isEmpty() ? "/dev/devi/mouse0" : device.toLatin1().constData(),
-                          QT_OPEN_RDONLY | O_NONBLOCK);
+                      QT_OPEN_RDONLY | O_NONBLOCK);
     if (mouseFD == -1) {
         qErrnoWarning(errno, "QQnxMouseHandler: Unable to open mouse device");
-        return;
+    } else {
+        struct _pointer_info data;
+        if (devctl(mouseFD, _POINTERGETINFO, &data, sizeof(data), NULL) == EOK)
+            absolutePositioning = (data.flags & _POINTER_FLAG_ABSOLUTE);
+        else
+            absolutePositioning = !device.isEmpty() && device.contains(QLatin1String("touch"));
+
+        // register a socket notifier on the file descriptor so we'll wake up whenever
+        // there's a mouse move waiting for us.
+        mouseNotifier = new QSocketNotifier(mouseFD, QSocketNotifier::Read, this);
+        connect(mouseNotifier, SIGNAL(activated(int)), SLOT(socketActivated()));
+
+        qDebug("QQnxMouseHandler: connected.");
     }
-
-    // register a socket notifier on the file descriptor so we'll wake up whenever
-    // there's a mouse move waiting for us.
-    mouseNotifier = new QSocketNotifier(mouseFD, QSocketNotifier::Read, this);
-    connect(mouseNotifier, SIGNAL(activated(int)), SLOT(socketActivated()));
-
-    qDebug() << "QQnxMouseHandler: connected.";
 }
 
 /*!
@@ -115,7 +120,8 @@ QQnxMouseHandler::QQnxMouseHandler(const QString & /*driver*/, const QString &de
  */
 QQnxMouseHandler::~QQnxMouseHandler()
 {
-    QT_CLOSE(mouseFD);
+    if (mouseFD != -1)
+        QT_CLOSE(mouseFD);
 }
 
 /*! \reimp */
@@ -140,39 +146,45 @@ void QQnxMouseHandler::suspend()
 */
 void QQnxMouseHandler::socketActivated()
 {
+    QPoint queuedPos = mousePos;
+
     // _mouse_packet is a QNX structure. devi-hid is nice enough to translate
     // the raw byte data from mouse devices into generic format for us.
-    _mouse_packet packet;
+    struct _mouse_packet buffer[32];
+    int n = 0;
 
-    int iteration = 0;
-
-    // read mouse events in batches of 10. Since we're getting quite a lot
-    // of mouse events, it's better to do them in batches than to return to the
-    // event loop every time.
-    do {
-        int bytesRead = QT_READ(mouseFD, &packet, sizeof(packet));
+    forever {
+        int bytesRead = QT_READ(mouseFD, reinterpret_cast<char *>(buffer) + n, sizeof(buffer) - n);
         if (bytesRead == -1) {
             // EAGAIN means that there are no more mouse events to read
             if (errno != EAGAIN)
-                qErrnoWarning(errno, "QQnxMouseHandler: Unable to read from socket");
-            return;
+                qErrnoWarning(errno, "QQnxMouseHandler: Could not read from input device");
+            break;
         }
 
-        // bytes read should always be equal to the size of a packet.
-        Q_ASSERT(bytesRead == sizeof(packet));
+        n += bytesRead;
+        if (n % sizeof(buffer[0]) == 0)
+            break;
+    }
+    n /= sizeof(buffer[0]);
 
-        // translate the coordinates from the QNX data structure to Qt coordinates
-        // note the swapped y axis
-        QPoint pos = mousePos;
-        pos += QPoint(packet.dx, -packet.dy);
+    for (int i = 0; i < n; ++i) {
+        const struct _mouse_packet &packet = buffer[i];
 
-        // QNX only tells us relative mouse movements, not absolute ones, so limit the
-        // cursor position manually to the screen
-        limitToScreen(pos);
+        // translate the coordinates from the QNX data structure to the Qt coordinates
+        if (absolutePositioning) {
+            queuedPos = QPoint(packet.dx, packet.dy);
+        } else {
+            // note the swapped y axis
+            queuedPos += QPoint(packet.dx, -packet.dy);
+
+            // QNX only tells us relative mouse movements, not absolute ones, so
+            // limit the cursor position manually to the screen
+            limitToScreen(queuedPos);
+        }
 
         // translate the QNX mouse button bitmask to Qt buttons
         int buttons = Qt::NoButton;
-
         if (packet.hdr.buttons & _POINTER_BUTTON_LEFT)
             buttons |= Qt::LeftButton;
         if (packet.hdr.buttons & _POINTER_BUTTON_MIDDLE)
@@ -180,11 +192,17 @@ void QQnxMouseHandler::socketActivated()
         if (packet.hdr.buttons & _POINTER_BUTTON_RIGHT)
             buttons |= Qt::RightButton;
 
-        // call mouseChanged() - this does all the magic to actually move the on-screen
-        // mouse cursor.
-        mouseChanged(pos, buttons, 0);
-    } while (++iteration < 11);
+        if (buttons != mouseButtons) {
+            // send the MouseEvent to avoid missing any clicks
+            mouseChanged(queuedPos, buttons, 0);
+            // mousePos updated by the mouseChanged()
+            queuedPos = mousePos;
+            mouseButtons = buttons;
+        }
+    }
+
+    if (queuedPos != mousePos)
+        mouseChanged(queuedPos, mouseButtons, 0);
 }
 
 QT_END_NAMESPACE
-
diff --git a/src/gui/embedded/qmouseqnx_qws.h b/src/gui/embedded/qmouseqnx_qws.h
index 2a5eef2..54deaf3 100644
--- a/src/gui/embedded/qmouseqnx_qws.h
+++ b/src/gui/embedded/qmouseqnx_qws.h
@@ -70,6 +70,8 @@ private Q_SLOTS:
 private:
     QSocketNotifier *mouseNotifier;
     int mouseFD;
+    int mouseButtons;
+    bool absolutePositioning;
 };
 
 QT_END_NAMESPACE
diff --git a/src/gui/embedded/qscreen_qws.h b/src/gui/embedded/qscreen_qws.h
index 2ecc6e7..5ff90f9 100644
--- a/src/gui/embedded/qscreen_qws.h
+++ b/src/gui/embedded/qscreen_qws.h
@@ -44,7 +44,7 @@
 
 #include <QtCore/qnamespace.h>
 #include <QtCore/qpoint.h>
-#include <QtCore/qlist.h>
+#include <QtCore/qstringlist.h>
 #include <QtGui/qrgb.h>
 #include <QtCore/qrect.h>
 #include <QtGui/qimage.h>
@@ -357,6 +357,7 @@ private:
     friend class QVNCScreen;
     friend class QLinuxFbScreen;
     friend class QVFbScreen;
+    friend class QQnxScreen;
     friend class QProxyScreen;
     friend class QIntfbScreen;
 #endif
diff --git a/src/gui/embedded/qscreenqnx_qws.cpp b/src/gui/embedded/qscreenqnx_qws.cpp
index 4afe087..d34e732 100644
--- a/src/gui/embedded/qscreenqnx_qws.cpp
+++ b/src/gui/embedded/qscreenqnx_qws.cpp
@@ -40,7 +40,9 @@
 ****************************************************************************/
 
 #include "qscreenqnx_qws.h"
-#include "qdebug.h"
+
+#include <qapplication.h>
+#include <qregexp.h>
 
 #include <gf/gf.h>
 
@@ -52,6 +54,10 @@ struct QQnxScreenContext
     inline QQnxScreenContext()
         : device(0), display(0), layer(0), hwSurface(0), memSurface(0), context(0)
     {}
+    inline ~QQnxScreenContext()
+    { cleanup(); }
+
+    void cleanup();
 
     gf_dev_t device;
     gf_dev_info_t deviceInfo;
@@ -64,6 +70,35 @@ struct QQnxScreenContext
     gf_context_t context;
 };
 
+void QQnxScreenContext::cleanup()
+{
+    if (context) {
+        gf_context_free(context);
+        context = 0;
+    }
+    if (memSurface) {
+        gf_surface_free(memSurface);
+        memSurface = 0;
+    }
+    if (hwSurface) {
+        gf_surface_free(hwSurface);
+        hwSurface = 0;
+    }
+    if (layer) {
+        gf_layer_detach(layer);
+        layer = 0;
+    }
+    if (display) {
+        gf_display_detach(display);
+        display = 0;
+    }
+    if (device) {
+        gf_dev_detach(device);
+        device = 0;
+    }
+}
+
+
 /*!
     \class QQnxScreen
     \preliminary
@@ -117,19 +152,23 @@ QQnxScreen::~QQnxScreen()
     delete d;
 }
 
-/*! \reimp
+/*!
+    \reimp
 */
 bool QQnxScreen::initDevice()
 {
-    // implement this if you have multiple processes that want to access the display
-    // (not required if QT_NO_QWS_MULTIPROCESS is set)
+#ifndef QT_NO_QWS_CURSOR
+    QScreenCursor::initSoftwareCursor();
+#endif
+
     return true;
 }
 
-/*! \internal
-  Attaches to the named device \a name.
+/*!
+    \internal
+    Attaches to the named device \a name.
 */
-static bool attachDevice(QQnxScreenContext * const d, const char *name)
+static inline bool attachDevice(QQnxScreenContext * const d, const char *name)
 {
     int ret = gf_dev_attach(&d->device, name, &d->deviceInfo);
     if (ret != GF_ERR_OK) {
@@ -139,193 +178,231 @@ static bool attachDevice(QQnxScreenContext * const d, const char *name)
     return true;
 }
 
-/*! \internal
-  Attaches to the display at index \a displayIndex.
- */
-static bool attachDisplay(QQnxScreenContext * const d, int displayIndex)
+/*!
+    \internal
+    Attaches to the display at index \a displayIndex.
+*/
+static inline bool attachDisplay(QQnxScreenContext * const d, int displayIndex)
 {
     int ret = gf_display_attach(&d->display, d->device, displayIndex, &d->displayInfo);
     if (ret != GF_ERR_OK) {
-        qWarning("QQnxScreen: gf_display_attach(%d) failed with error code %d",
-                displayIndex, ret);
+        qWarning("QQnxScreen: gf_display_attach(%d) failed with error code %d", displayIndex, ret);
         return false;
     }
     return true;
 }
 
-/*! \internal
-  Attaches to the layer \a layerIndex.
- */
-static bool attachLayer(QQnxScreenContext * const d, int layerIndex)
+/*!
+    \internal
+    Attaches to the layer \a layerIndex.
+*/
+static inline bool attachLayer(QQnxScreenContext * const d, int layerIndex)
 {
-    int ret = gf_layer_attach(&d->layer, d->display, layerIndex, 0);
+    unsigned flags = QApplication::type() != QApplication::GuiServer ? GF_LAYER_ATTACH_PASSIVE : 0;
+    int ret = gf_layer_attach(&d->layer, d->display, layerIndex, flags);
     if (ret != GF_ERR_OK) {
-        qWarning("QQnxScreen: gf_layer_attach(%d) failed with error code %d", layerIndex,
-                ret);
+        qWarning("QQnxScreen: gf_layer_attach(%d) failed with error code %d", layerIndex, ret);
         return false;
     }
-    gf_layer_enable(d->layer);
 
     return true;
 }
 
-/*! \internal
-  Creates a new hardware surface (usually on the Gfx card memory) with the dimensions \a w * \a h.
- */
-static bool createHwSurface(QQnxScreenContext * const d, int w, int h)
+/*!
+    \internal
+    Creates a new hardware surface (usually on the Gfx card memory) with the dimensions \a w * \a h.
+*/
+static inline bool createHwSurface(QQnxScreenContext * const d, int w, int h)
 {
     int ret = gf_surface_create_layer(&d->hwSurface, &d->layer, 1, 0,
-                w, h, GF_FORMAT_ARGB8888, 0, 0);
+                                      w, h, d->displayInfo.format, 0, 0);
     if (ret != GF_ERR_OK) {
-        qWarning("QQnxScreen: gf_surface_create_layer(%dx%d) failed with error code %d",
-                w, h, ret);
+        qWarning("QQnxScreen: gf_surface_create_layer(%dx%d) failed with error code %d", w, h, ret);
         return false;
     }
 
     gf_layer_set_surfaces(d->layer, &d->hwSurface, 1);
 
+    gf_layer_enable(d->layer);
+
     ret = gf_layer_update(d->layer, 0);
     if (ret != GF_ERR_OK) {
         qWarning("QQnxScreen: gf_layer_update() failed with error code %d\n", ret);
         return false;
     }
 
-    return true;
-}
-
-/*! \internal
-  Creates an in-memory, linear accessible surface of dimensions \a w * \a h.
-  This is the main surface that QWS blits to.
- */
-static bool createMemSurface(QQnxScreenContext * const d, int w, int h)
-{
-    // Note: gf_surface_attach() could also be used, so we'll create the buffer
-    // and let the surface point to it. Here, we use surface_create instead.
-
-    int ret = gf_surface_create(&d->memSurface, d->device, w, h,
-                GF_FORMAT_ARGB8888, 0,
-                GF_SURFACE_CREATE_CPU_FAST_ACCESS | GF_SURFACE_CREATE_CPU_LINEAR_ACCESSIBLE
-                | GF_SURFACE_PHYS_CONTIG | GF_SURFACE_CREATE_SHAREABLE);
+    ret = gf_context_create(&d->context);
     if (ret != GF_ERR_OK) {
-        qWarning("QQnxScreen: gf_surface_create(%dx%d) failed with error code %d",
-                w, h, ret);
+        qWarning("QQnxScreen: gf_context_create() failed with error code %d", ret);
         return false;
     }
 
-    gf_surface_get_info(d->memSurface, &d->memSurfaceInfo);
-
-    if (d->memSurfaceInfo.sid == unsigned(GF_SID_INVALID)) {
-        qWarning("QQnxScreen: gf_surface_get_info() failed.");
+    ret = gf_context_set_surface(d->context, d->hwSurface);
+    if (ret != GF_ERR_OK) {
+        qWarning("QQnxScreen: gf_context_set_surface() failed with error code %d", ret);
         return false;
     }
 
     return true;
 }
 
-/* \internal
-   Creates a QNX gf context and sets our memory surface on it.
- */
-static bool createContext(QQnxScreenContext * const d)
+/*!
+    \internal
+    Creates an in-memory, linear accessible surface of dimensions \a w * \a h.
+    This is the main surface that QWS blits to.
+*/
+static inline bool createMemSurface(QQnxScreenContext * const d, int w, int h)
 {
-    int ret = gf_context_create(&d->context);
+#ifndef QT_NO_QWS_MULTIPROCESS
+    if (QApplication::type() != QApplication::GuiServer) {
+        unsigned sidlist[64];
+        int n = gf_surface_sidlist(d->device, sidlist); // undocumented API
+        for (int i = 0; i < n; ++i) {
+            int ret = gf_surface_attach_by_sid(&d->memSurface, d->device, sidlist[i]);
+            if (ret == GF_ERR_OK) {
+                gf_surface_get_info(d->memSurface, &d->memSurfaceInfo);
+                if (d->memSurfaceInfo.sid != unsigned(GF_SID_INVALID)) {
+                    // can we use the surface's vaddr?
+                    unsigned flags = GF_SURFACE_CPU_LINEAR_READABLE | GF_SURFACE_CPU_LINEAR_WRITEABLE;
+                    if ((d->memSurfaceInfo.flags & flags) == flags)
+                        return true;
+                }
+
+                gf_surface_free(d->memSurface);
+                d->memSurface = 0;
+            }
+        }
+        qWarning("QQnxScreen: cannot attach to an usable surface; create a new one.");
+    }
+#endif
+    int ret = gf_surface_create(&d->memSurface, d->device, w, h, d->displayInfo.format, 0,
+                GF_SURFACE_CREATE_CPU_FAST_ACCESS | GF_SURFACE_CREATE_CPU_LINEAR_ACCESSIBLE
+                | GF_SURFACE_CREATE_PHYS_CONTIG | GF_SURFACE_CREATE_SHAREABLE);
     if (ret != GF_ERR_OK) {
-        qWarning("QQnxScreen: gf_context_create() failed with error code %d", ret);
+        qWarning("QQnxScreen: gf_surface_create(%dx%d) failed with error code %d",
+                 w, h, ret);
         return false;
     }
 
-    ret = gf_context_set_surface(d->context, d->memSurface);
-    if (ret != GF_ERR_OK) {
-        qWarning("QQnxScreen: gf_context_set_surface() failed with error code %d", ret);
+    gf_surface_get_info(d->memSurface, &d->memSurfaceInfo);
+
+    if (d->memSurfaceInfo.sid == unsigned(GF_SID_INVALID)) {
+        qWarning("QQnxScreen: gf_surface_get_info() failed.");
         return false;
     }
 
     return true;
 }
 
-/*! \reimp
-  Connects to QNX's io-display based device based on the \a displaySpec parameters
-  from the \c{QWS_DISPLAY} environment variable. See the QQnxScreen class documentation
-  for possible parameters.
+/*!
+    \reimp
+    Connects to QNX's io-display based device based on the \a displaySpec parameters
+    from the \c{QWS_DISPLAY} environment variable. See the QQnxScreen class documentation
+    for possible parameters.
 
-  \sa QQnxScreen
- */
+    \sa QQnxScreen
+*/
 bool QQnxScreen::connect(const QString &displaySpec)
 {
     const QStringList params = displaySpec.split(QLatin1Char(':'), QString::SkipEmptyParts);
 
-    bool isOk = false;
-    QRegExp deviceRegExp(QLatin1String("^device=(.+)$"));
-    if (params.indexOf(deviceRegExp) != -1) {
-        isOk = attachDevice(d, deviceRegExp.cap(1).toLocal8Bit().constData());
-    } else {
-        // no device specified - attach to device 0 (the default)
-        isOk = attachDevice(d, GF_DEVICE_INDEX(0));
+    // default to device 0
+    int deviceIndex = 0;
+    if (!params.isEmpty()) {
+        QRegExp deviceRegExp(QLatin1String("^device=(.+)$"));
+        if (params.indexOf(deviceRegExp) != -1)
+            deviceIndex = deviceRegExp.cap(1).toInt();
     }
 
-    if (!isOk)
+    if (!attachDevice(d, GF_DEVICE_INDEX(deviceIndex)))
         return false;
 
     qDebug("QQnxScreen: Attached to Device, number of displays: %d", d->deviceInfo.ndisplays);
 
-    // default to display 0
-    int displayIndex = 0;
-    QRegExp displayRegexp(QLatin1String("^display=(\\d+)$"));
-    if (params.indexOf(displayRegexp) != -1) {
-        displayIndex = displayRegexp.cap(1).toInt();
+    // default to display id passed to constructor
+    int displayIndex = displayId;
+    if (!params.isEmpty()) {
+        QRegExp displayRegexp(QLatin1String("^display=(\\d+)$"));
+        if (params.indexOf(displayRegexp) != -1)
+            displayIndex = displayRegexp.cap(1).toInt();
     }
 
     if (!attachDisplay(d, displayIndex))
         return false;
 
     qDebug("QQnxScreen: Attached to Display %d, resolution %dx%d, refresh %d Hz",
-            displayIndex, d->displayInfo.xres, d->displayInfo.yres,
-            d->displayInfo.refresh);
-
+            displayIndex, d->displayInfo.xres, d->displayInfo.yres, d->displayInfo.refresh);
 
     // default to main_layer_index from the displayInfo struct
-    int layerIndex = 0;
-    QRegExp layerRegexp(QLatin1String("^layer=(\\d+)$"));
-    if (params.indexOf(layerRegexp) != -1) {
-        layerIndex = layerRegexp.cap(1).toInt();
-    } else {
-        layerIndex = d->displayInfo.main_layer_index;
+    int layerIndex = d->displayInfo.main_layer_index;
+    if (!params.isEmpty()) {
+        QRegExp layerRegexp(QLatin1String("^layer=(\\d+)$"));
+        if (params.indexOf(layerRegexp) != -1)
+            layerIndex = layerRegexp.cap(1).toInt();
     }
 
     if (!attachLayer(d, layerIndex))
         return false;
 
+    // determine the pixel format and the pixel type
+    switch (d->displayInfo.format) {
+#if defined(QT_QWS_DEPTH_32) || defined(QT_QWS_DEPTH_GENERIC)
+        case GF_FORMAT_ARGB8888:
+            pixeltype = QScreen::BGRPixel;
+        // fall through
+        case GF_FORMAT_BGRA8888:
+            setPixelFormat(QImage::Format_ARGB32);
+            break;
+#endif
+#if defined(QT_QWS_DEPTH_24)
+        case GF_FORMAT_BGR888:
+            pixeltype = QScreen::BGRPixel;
+            setPixelFormat(QImage::Format_RGB888);
+            break;
+#endif
+#if defined(QT_QWS_DEPTH_16) || defined(QT_QWS_DEPTH_GENERIC)
+        case GF_FORMAT_PACK_RGB565:
+        case GF_FORMAT_PKLE_RGB565:
+        case GF_FORMAT_PKBE_RGB565:
+#if Q_BYTE_ORDER == Q_BIG_ENDIAN
+            setFrameBufferLittleEndian((d->displayInfo.format & GF_FORMAT_PKLE) == GF_FORMAT_PKLE);
+#endif
+            setPixelFormat(QImage::Format_RGB16);
+            break;
+#endif
+        default:
+            return false;
+    }
+
     // tell QWSDisplay the width and height of the display
     w = dw = d->displayInfo.xres;
     h = dh = d->displayInfo.yres;
-
-    // we only support 32 bit displays for now.
-    QScreen::d = 32;
+    QScreen::d = (d->displayInfo.format & GF_FORMAT_BPP);  // colour depth
 
     // assume 72 dpi as default, to calculate the physical dimensions if not specified
     const int defaultDpi = 72;
-
-    // Handle display physical size spec.
-    QRegExp mmWidthRegexp(QLatin1String("^mmWidth=(\\d+)$"));
-    if (params.indexOf(mmWidthRegexp) == -1) {
-        physWidth = qRound(dw * 25.4 / defaultDpi);
-    } else {
-        physWidth = mmWidthRegexp.cap(1).toInt();
+    // Handle display physical size
+    physWidth = qRound(dw * 25.4 / defaultDpi);
+    physHeight = qRound(dh * 25.4 / defaultDpi);
+    if (!params.isEmpty()) {
+        QRegExp mmWidthRegexp(QLatin1String("^mmWidth=(\\d+)$"));
+        if (params.indexOf(mmWidthRegexp) != -1)
+            physWidth = mmWidthRegexp.cap(1).toInt();
+
+        QRegExp mmHeightRegexp(QLatin1String("^mmHeight=(\\d+)$"));
+        if (params.indexOf(mmHeightRegexp) != -1)
+            physHeight = mmHeightRegexp.cap(1).toInt();
     }
 
-    QRegExp mmHeightRegexp(QLatin1String("^mmHeight=(\\d+)$"));
-    if (params.indexOf(mmHeightRegexp) == -1) {
-        physHeight = qRound(dh * 25.4 / defaultDpi);
-    } else {
-        physHeight = mmHeightRegexp.cap(1).toInt();
+    if (QApplication::type() == QApplication::GuiServer) {
+        // create a hardware surface with our dimensions. In the old days, it was possible
+        // to get a pointer directly to the hw surface, so we could blit directly. Now, we
+        // have to use one indirection more, because it's not guaranteed that the hw surface
+        // is mappable into our process.
+        if (!createHwSurface(d, w, h))
+            return false;
     }
 
-    // create a hardware surface with our dimensions. In the old days, it was possible
-    // to get a pointer directly to the hw surface, so we could blit directly. Now, we
-    // have to use one indirection more, because it's not guaranteed that the hw surface
-    // is mappable into our process.
-    if (!createHwSurface(d, w, h))
-        return false;
-
     // create an in-memory linear surface that is used by QWS. QWS will blit directly in here.
     if (!createMemSurface(d, w, h))
         return false;
@@ -338,72 +415,84 @@ bool QQnxScreen::connect(const QString &displaySpec)
     // the overall size of the in-memory buffer is linestep * height
     size = mapsize = lstep * h;
 
-    // create a QNX drawing context
-    if (!createContext(d))
-        return false;
-
-    // we're always using a software cursor for now. Initialize it here.
-    QScreenCursor::initSoftwareCursor();
-
     // done, the driver should be connected to the display now.
     return true;
 }
 
-/*! \reimp
- */
+/*!
+    \reimp
+*/
 void QQnxScreen::disconnect()
 {
-    if (d->context)
-        gf_context_free(d->context);
-
-    if (d->memSurface)
-        gf_surface_free(d->memSurface);
-
-    if (d->hwSurface)
-        gf_surface_free(d->hwSurface);
-
-    if (d->layer)
-        gf_layer_detach(d->layer);
-
-    if (d->display)
-        gf_display_detach(d->display);
-
-    if (d->device)
-        gf_dev_detach(d->device);
-
-    d->memSurface = 0;
-    d->hwSurface = 0;
-    d->context = 0;
-    d->layer = 0;
-    d->display = 0;
-    d->device = 0;
+    d->cleanup();
 }
 
-/*! \reimp
- */
+/*!
+    \reimp
+*/
 void QQnxScreen::shutdownDevice()
 {
 }
 
-
-/*! \reimp
-  QQnxScreen doesn't support setting the mode, use io-display instead.
- */
+/*!
+    \reimp
+    QQnxScreen doesn't support setting the mode, use io-display instead.
+*/
 void QQnxScreen::setMode(int,int,int)
 {
     qWarning("QQnxScreen: Unable to change mode, use io-display instead.");
 }
 
-/*! \reimp
- */
+/*!
+    \reimp
+*/
 bool QQnxScreen::supportsDepth(int depth) const
 {
-    // only 32-bit for the moment
-    return depth == 32;
+    gf_modeinfo_t displayMode;
+    for (int i = 0; gf_display_query_mode(d->display, i, &displayMode) == GF_ERR_OK; ++i) {
+        switch (displayMode.primary_format) {
+#if defined(QT_QWS_DEPTH_32) || defined(QT_QWS_DEPTH_GENERIC)
+            case GF_FORMAT_ARGB8888:
+            case GF_FORMAT_BGRA8888:
+                if (depth == 32)
+                    return true;
+                break;
+#endif
+#if defined(QT_QWS_DEPTH_24)
+            case GF_FORMAT_BGR888:
+                if (depth == 24)
+                    return true;
+                break;
+#endif
+#if defined(QT_QWS_DEPTH_16) || defined(QT_QWS_DEPTH_GENERIC)
+            case GF_FORMAT_PACK_RGB565:
+            case GF_FORMAT_PKLE_RGB565:
+            case GF_FORMAT_PKBE_RGB565:
+                if (depth == 16)
+                    return true;
+                break;
+#endif
+            default:
+                break;
+        }
+    }
+
+    return false;
 }
 
-/*! \reimp
- */
+/*!
+    \reimp
+*/
+void QQnxScreen::blank(bool on)
+{
+    int ret = gf_display_set_dpms(d->display, on ? GF_DPMS_OFF : GF_DPMS_ON);
+    if (ret != GF_ERR_OK)
+        qWarning("QQnxScreen: gf_display_set_dpms() failed with error code %d", ret);
+}
+
+/*!
+    \reimp
+*/
 void QQnxScreen::exposeRegion(QRegion r, int changing)
 {
     // here is where the actual magic happens. QWS will call exposeRegion whenever
@@ -414,6 +503,10 @@ void QQnxScreen::exposeRegion(QRegion r, int changing)
     QScreen::exposeRegion(r, changing);
 
     // now our in-memory surface should be up to date with the latest changes.
+
+    if (!d->hwSurface)
+        return;
+
     // the code below copies the region from the in-memory surface to the hardware.
 
     // just get the bounding rectangle of the region. Most screen updates are rectangular
@@ -432,16 +525,14 @@ void QQnxScreen::exposeRegion(QRegion r, int changing)
 
     // blit the changed region from the memory surface to the hardware surface
     ret = gf_draw_blit2(d->context, d->memSurface, d->hwSurface,
-            br.x(), br.y(), br.right(), br.bottom(), br.x(), br.y());
-    if (ret != GF_ERR_OK) {
+                        br.x(), br.y(), br.right(), br.bottom(), br.x(), br.y());
+    if (ret != GF_ERR_OK)
         qWarning("QQnxScreen: gf_draw_blit2() failed with error code %d", ret);
-    }
 
     // flush all drawing commands (in our case, a single blit)
     ret = gf_draw_flush(d->context);
-    if (ret != GF_ERR_OK) {
+    if (ret != GF_ERR_OK)
         qWarning("QQnxScreen: gf_draw_flush() failed with error code %d", ret);
-    }
 
     // tell QNX that we're done drawing.
     gf_draw_end(d->context);
diff --git a/src/gui/embedded/qscreenqnx_qws.h b/src/gui/embedded/qscreenqnx_qws.h
index 38c0ac9..6f6d18a 100644
--- a/src/gui/embedded/qscreenqnx_qws.h
+++ b/src/gui/embedded/qscreenqnx_qws.h
@@ -66,6 +66,7 @@ public:
     void shutdownDevice();
     void setMode(int,int,int);
     bool supportsDepth(int) const;
+    void blank(bool on);
 
     void exposeRegion(QRegion r, int changing);
 
diff --git a/src/gui/embedded/qwslock.cpp b/src/gui/embedded/qwslock.cpp
index c14f50b..f9ea000 100644
--- a/src/gui/embedded/qwslock.cpp
+++ b/src/gui/embedded/qwslock.cpp
@@ -45,12 +45,15 @@
 
 #include "qwssignalhandler_p.h"
 
+#include <stdint.h>
 #include <stdio.h>
 #include <errno.h>
 #include <string.h>
 #include <sys/types.h>
 #include <sys/ipc.h>
+#ifndef QT_POSIX_IPC
 #include <sys/sem.h>
+#endif
 #include <sys/time.h>
 #include <time.h>
 #ifdef Q_OS_LINUX
@@ -66,6 +69,12 @@ QT_BEGIN_NAMESPACE
 #error QWSLock currently requires semaphores
 #endif
 
+#ifdef QT_POSIX_IPC
+#include <QtCore/QAtomicInt>
+
+static QBasicAtomicInt localUniqueId = Q_BASIC_ATOMIC_INITIALIZER(1);
+#endif
+
 QWSLock::QWSLock(int id) : semId(id)
 {
     static unsigned short initialValues[3] = { 1, 1, 0 };
@@ -74,6 +83,7 @@ QWSLock::QWSLock(int id) : semId(id)
     QWSSignalHandler::instance()->addWSLock(this);
 #endif
 
+#ifndef QT_POSIX_IPC
     if (semId == -1) {
         semId = semget(IPC_PRIVATE, 3, IPC_CREAT | 0666);
         if (semId == -1) {
@@ -88,6 +98,30 @@ QWSLock::QWSLock(int id) : semId(id)
             qFatal("Unable to initialize semaphores");
         }
     }
+#else
+    sems[0] = sems[1] = sems[2] = SEM_FAILED;
+    owned = false;
+
+    if (semId == -1) {
+        // ### generate really unique IDs
+        semId = (getpid() << 16) + (localUniqueId.fetchAndAddRelaxed(1) % ushort(-1));
+        owned = true;
+    }
+
+    QByteArray pfx = "/qwslock_" + QByteArray::number(semId, 16) + '_';
+    QByteArray keys[3] = { pfx + "BackingStore", pfx + "Communication", pfx + "RegionEvent" };
+    for (int i = 0; i < 3; ++i) {
+        if (owned)
+            sem_unlink(keys[i].constData());
+        do {
+            sems[i] = sem_open(keys[i].constData(), (owned ? O_CREAT : 0), 0666, initialValues[i]);
+        } while (sems[i] == SEM_FAILED && errno == EINTR);
+        if (sems[i] == SEM_FAILED) {
+            perror("QWSLock::QWSLock");
+            qFatal("Unable to %s semaphore", (owned ? "create" : "open"));
+        }
+    }
+#endif
 
     lockCount[0] = lockCount[1] = 0;
 }
@@ -99,10 +133,27 @@ QWSLock::~QWSLock()
 #endif
 
     if (semId != -1) {
+#ifndef QT_POSIX_IPC
         qt_semun semval;
         semval.val = 0;
         semctl(semId, 0, IPC_RMID, semval);
         semId = -1;
+#else
+        // emulate the SEM_UNDO behavior for the BackingStore lock
+        while (hasLock(BackingStore))
+            unlock(BackingStore);
+
+        QByteArray pfx = "/qwslock_" + QByteArray::number(semId, 16) + '_';
+        QByteArray keys[3] = { pfx + "BackingStore", pfx + "Communication", pfx + "RegionEvent" };
+        for (int i = 0; i < 3; ++i) {
+            if (sems[i] != SEM_FAILED) {
+                sem_close(sems[i]);
+                sems[i] = SEM_FAILED;
+            }
+            if (owned)
+                sem_unlink(keys[i].constData());
+        }
+#endif
     }
 }
 
@@ -110,6 +161,7 @@ bool QWSLock::up(unsigned short semNum)
 {
     int ret;
 
+#ifndef QT_POSIX_IPC
     sembuf sops = { semNum, 1, 0 };
     // As the BackingStore lock is a mutex, and only one process may own
     // the lock, it's safe to use SEM_UNDO. On the other hand, the
@@ -119,6 +171,9 @@ bool QWSLock::up(unsigned short semNum)
         sops.sem_flg |= SEM_UNDO;
 
     EINTR_LOOP(ret, semop(semId, &sops, 1));
+#else
+    ret = sem_post(sems[semNum]);
+#endif
     if (ret == -1) {
         qDebug("QWSLock::up(): %s", strerror(errno));
         return false;
@@ -131,6 +186,7 @@ bool QWSLock::down(unsigned short semNum, int)
 {
     int ret;
 
+#ifndef QT_POSIX_IPC
     sembuf sops = { semNum, -1, 0 };
     // As the BackingStore lock is a mutex, and only one process may own
     // the lock, it's safe to use SEM_UNDO. On the other hand, the
@@ -140,6 +196,9 @@ bool QWSLock::down(unsigned short semNum, int)
         sops.sem_flg |= SEM_UNDO;
 
     EINTR_LOOP(ret, semop(semId, &sops, 1));
+#else
+    EINTR_LOOP(ret, sem_wait(sems[semNum]));
+#endif
     if (ret == -1) {
         qDebug("QWSLock::down(): %s", strerror(errno));
         return false;
@@ -150,7 +209,13 @@ bool QWSLock::down(unsigned short semNum, int)
 
 int QWSLock::getValue(unsigned short semNum) const
 {
-    int ret = semctl(semId, semNum, GETVAL, 0);
+    int ret;
+#ifndef QT_POSIX_IPC
+    ret = semctl(semId, semNum, GETVAL, 0);
+#else
+    if (sem_getvalue(sems[semNum], &ret) == -1)
+        ret = -1;
+#endif
     if (ret == -1)
         qDebug("QWSLock::getValue(): %s", strerror(errno));
     return ret;
diff --git a/src/gui/embedded/qwslock_p.h b/src/gui/embedded/qwslock_p.h
index d020b22..71a4cca 100644
--- a/src/gui/embedded/qwslock_p.h
+++ b/src/gui/embedded/qwslock_p.h
@@ -57,6 +57,10 @@
 
 #ifndef QT_NO_QWS_MULTIPROCESS
 
+#ifdef QT_POSIX_IPC
+#  include <semaphore.h>
+#endif
+
 QT_BEGIN_NAMESPACE
 
 class QWSLock
@@ -80,6 +84,10 @@ private:
 
     int semId;
     int lockCount[2];
+#ifdef QT_POSIX_IPC
+    sem_t *sems[3];
+    bool owned;
+#endif
 };
 
 QT_END_NAMESPACE
diff --git a/src/gui/embedded/qwssharedmemory.cpp b/src/gui/embedded/qwssharedmemory.cpp
index a677626..853de61 100644
--- a/src/gui/embedded/qwssharedmemory.cpp
+++ b/src/gui/embedded/qwssharedmemory.cpp
@@ -45,14 +45,37 @@
 
 #include <sys/types.h>
 #include <sys/ipc.h>
+#ifndef QT_POSIX_IPC
 #include <sys/shm.h>
+#else
+#include <sys/mman.h>
+#include <sys/stat.h>
+#endif
+#include <fcntl.h>
+#include <unistd.h>
+
+#include <private/qcore_unix_p.h>
 
 //#define QT_SHM_DEBUG
 
 QT_BEGIN_NAMESPACE
 
+#ifdef QT_POSIX_IPC
+#include <QtCore/QAtomicInt>
+
+static QBasicAtomicInt localUniqueId = Q_BASIC_ATOMIC_INITIALIZER(1);
+
+static inline QByteArray makeKey(int id)
+{
+    return "/qwsshm_" + QByteArray::number(id, 16);
+}
+#endif
+
 QWSSharedMemory::QWSSharedMemory()
     : shmId(-1), shmBase(0), shmSize(0)
+#ifdef QT_POSIX_IPC
+    , hand(-1)
+#endif
 {
 }
 
@@ -66,19 +89,47 @@ bool QWSSharedMemory::create(int size)
     if (shmId != -1)
         detach();
 
+#ifndef QT_POSIX_IPC
     shmId = shmget(IPC_PRIVATE, size, IPC_CREAT | 0600);
+#else
+    // ### generate really unique IDs
+    shmId = (getpid() << 16) + (localUniqueId.fetchAndAddRelaxed(1) % ushort(-1));
+    QByteArray shmName = makeKey(shmId);
+    EINTR_LOOP(hand, shm_open(shmName.constData(), O_RDWR | O_CREAT, 0660));
+    if (hand != -1) {
+        // the size may only be set once; ignore errors
+        int ret;
+        EINTR_LOOP(ret, ftruncate(hand, size));
+        if (ret == -1)
+            shmId = -1;
+    } else {
+        shmId = -1;
+    }
+#endif
     if (shmId == -1) {
 #ifdef QT_SHM_DEBUG
         perror("QWSSharedMemory::create():");
         qWarning("Error allocating shared memory of size %d", size);
 #endif
+        detach();
         return false;
     }
+
+#ifndef QT_POSIX_IPC
     shmBase = shmat(shmId, 0, 0);
     // On Linux, it is possible to attach a shared memory segment even if it
     // is already marked to be deleted. However, POSIX.1-2001 does not specify
     // this behaviour and many other implementations do not support it.
     shmctl(shmId, IPC_RMID, 0);
+#else
+    // grab the size
+    QT_STATBUF st;
+    if (QT_FSTAT(hand, &st) != -1) {
+        shmSize = st.st_size;
+        // grab the memory
+        shmBase = mmap(0, shmSize, PROT_READ | PROT_WRITE, MAP_SHARED, hand, 0);
+    }
+#endif
     if (shmBase == (void*)-1 || !shmBase) {
 #ifdef QT_SHM_DEBUG
         perror("QWSSharedMemory::create():");
@@ -102,7 +153,21 @@ bool QWSSharedMemory::attach(int id)
         return false;
 
     shmId = id;
+#ifndef QT_POSIX_IPC
     shmBase = shmat(shmId, 0, 0);
+#else
+    QByteArray shmName = makeKey(shmId);
+    EINTR_LOOP(hand, shm_open(shmName.constData(), O_RDWR, 0660));
+    if (hand != -1) {
+        // grab the size
+        QT_STATBUF st;
+        if (QT_FSTAT(hand, &st) != -1) {
+            shmSize = st.st_size;
+            // grab the memory
+            shmBase = mmap(0, shmSize, PROT_READ | PROT_WRITE, MAP_SHARED, hand, 0);
+        }
+    }
+#endif
     if (shmBase == (void*)-1 || !shmBase) {
 #ifdef QT_SHM_DEBUG
         perror("QWSSharedMemory::attach():");
@@ -117,8 +182,28 @@ bool QWSSharedMemory::attach(int id)
 
 void QWSSharedMemory::detach()
 {
+#ifndef QT_POSIX_IPC
     if (shmBase && shmBase != (void*)-1)
         shmdt(shmBase);
+#else
+    if (shmBase && shmBase != (void*)-1)
+        munmap(shmBase, shmSize);
+    if (hand > 0) {
+        // get the number of current attachments
+        int shm_nattch = 0;
+        QT_STATBUF st;
+        if (QT_FSTAT(hand, &st) == 0) {
+            // subtract 2 from linkcount: one for our own open and one for the dir entry
+            shm_nattch = st.st_nlink - 2;
+        }
+        qt_safe_close(hand);
+        // if there are no attachments then unlink the shared memory
+        if (shm_nattch == 0) {
+            QByteArray shmName = makeKey(shmId);
+            shm_unlink(shmName.constData());
+        }
+    }
+#endif
     shmBase = 0;
     shmSize = 0;
     shmId = -1;
@@ -129,11 +214,13 @@ int QWSSharedMemory::size() const
     if (shmId == -1)
         return 0;
 
+#ifndef QT_POSIX_IPC
     if (!shmSize) {
         struct shmid_ds shm;
         shmctl(shmId, IPC_STAT, &shm);
-        const_cast<QWSSharedMemory *>(this)->shmSize = shm.shm_segsz;
+        shmSize = shm.shm_segsz;
     }
+#endif
 
     return shmSize;
 }
diff --git a/src/gui/embedded/qwssharedmemory_p.h b/src/gui/embedded/qwssharedmemory_p.h
index f3ce241..42ef6c8 100644
--- a/src/gui/embedded/qwssharedmemory_p.h
+++ b/src/gui/embedded/qwssharedmemory_p.h
@@ -77,7 +77,10 @@ public:
 private:
     int shmId;
     void *shmBase;
-    int shmSize;
+    mutable int shmSize;
+#ifdef QT_POSIX_IPC
+    int hand;
+#endif
 };
 
 #endif // QT_NO_QWS_MULTIPROCESS
diff --git a/src/gui/graphicsview/qgraphicslayout.cpp b/src/gui/graphicsview/qgraphicslayout.cpp
index 76d2d04..6fbe849 100644
--- a/src/gui/graphicsview/qgraphicslayout.cpp
+++ b/src/gui/graphicsview/qgraphicslayout.cpp
@@ -269,18 +269,8 @@ void QGraphicsLayout::activate()
         return;
     Q_ASSERT(!parentItem->isLayout());
 
-    if (QGraphicsLayout::instantInvalidatePropagation()) {
-        QGraphicsWidget *parentWidget = static_cast<QGraphicsWidget*>(parentItem);
-        if (!parentWidget->parentLayoutItem()) {
-            // we've reached the topmost widget, resize it
-            bool wasResized = parentWidget->testAttribute(Qt::WA_Resized);
-            parentWidget->resize(parentWidget->size());
-            parentWidget->setAttribute(Qt::WA_Resized, wasResized);
-        }
-
-        setGeometry(parentItem->contentsRect());    // relayout children
-    } else {
-        setGeometry(parentItem->contentsRect());    // relayout children
+    setGeometry(parentItem->contentsRect());    // relayout children
+    if (!QGraphicsLayout::instantInvalidatePropagation()) {
         parentLayoutItem()->updateGeometry();
     }
 }
diff --git a/src/gui/graphicsview/qgraphicswidget.cpp b/src/gui/graphicsview/qgraphicswidget.cpp
index 804394a..965b1b34 100644
--- a/src/gui/graphicsview/qgraphicswidget.cpp
+++ b/src/gui/graphicsview/qgraphicswidget.cpp
@@ -347,11 +347,10 @@ void QGraphicsWidget::setGeometry(const QRectF &rect)
 {
     QGraphicsWidgetPrivate *wd = QGraphicsWidget::d_func();
     QGraphicsLayoutItemPrivate *d = QGraphicsLayoutItem::d_ptr.data();
-    QRectF newGeom;
+    QRectF newGeom = rect;
     QPointF oldPos = d->geom.topLeft();
     if (!wd->inSetPos) {
         setAttribute(Qt::WA_Resized);
-        newGeom = rect;
         newGeom.setSize(rect.size().expandedTo(effectiveSizeHint(Qt::MinimumSize))
                                    .boundedTo(effectiveSizeHint(Qt::MaximumSize)));
 
@@ -405,14 +404,7 @@ void QGraphicsWidget::setGeometry(const QRectF &rect)
                 emit widthChanged();
             if (oldSize.height() != newGeom.size().height())
                 emit heightChanged();
-            QGraphicsLayout *lay = wd->layout;
-            if (QGraphicsLayout::instantInvalidatePropagation()) {
-                if (!lay || lay->isActivated()) {
-                    QApplication::sendEvent(this, &re);
-                }
-            } else {
-                QApplication::sendEvent(this, &re);
-            }
+            QApplication::sendEvent(this, &re);
         }
     }
 
@@ -1091,8 +1083,11 @@ void QGraphicsWidget::updateGeometry()
              * When the event is received, it will start flowing all the way down to the leaf
              * widgets in one go. This will make a relayout flicker-free.
              */
-            if (QGraphicsLayout::instantInvalidatePropagation())
-                QApplication::postEvent(static_cast<QGraphicsWidget *>(this), new QEvent(QEvent::LayoutRequest));
+            if (QGraphicsLayout::instantInvalidatePropagation()) {
+                Q_D(QGraphicsWidget);
+                ++d->refCountInvokeRelayout;
+                QMetaObject::invokeMethod(this, "_q_relayout", Qt::QueuedConnection);
+            }
         }
         if (!QGraphicsLayout::instantInvalidatePropagation()) {
             bool wasResized = testAttribute(Qt::WA_Resized);
diff --git a/src/gui/graphicsview/qgraphicswidget.h b/src/gui/graphicsview/qgraphicswidget.h
index 063be2d..5085817 100644
--- a/src/gui/graphicsview/qgraphicswidget.h
+++ b/src/gui/graphicsview/qgraphicswidget.h
@@ -234,6 +234,8 @@ protected:
 private:
     Q_DISABLE_COPY(QGraphicsWidget)
     Q_DECLARE_PRIVATE_D(QGraphicsItem::d_ptr.data(), QGraphicsWidget)
+    Q_PRIVATE_SLOT(d_func(), void _q_relayout())
+
     friend class QGraphicsScene;
     friend class QGraphicsScenePrivate;
     friend class QGraphicsView;
diff --git a/src/gui/graphicsview/qgraphicswidget_p.cpp b/src/gui/graphicsview/qgraphicswidget_p.cpp
index 8649dec..ca6713b 100644
--- a/src/gui/graphicsview/qgraphicswidget_p.cpp
+++ b/src/gui/graphicsview/qgraphicswidget_p.cpp
@@ -233,6 +233,18 @@ void QGraphicsWidgetPrivate::resolveLayoutDirection()
     }
 }
 
+/* private slot */
+void QGraphicsWidgetPrivate::_q_relayout()
+{
+    --refCountInvokeRelayout;
+    if (refCountInvokeRelayout == 0) {
+        Q_Q(QGraphicsWidget);
+        bool wasResized = q->testAttribute(Qt::WA_Resized);
+        q->resize(q->size()); // this will restrict the size
+        q->setAttribute(Qt::WA_Resized, wasResized);
+    }
+}
+
 QPalette QGraphicsWidgetPrivate::naturalWidgetPalette() const
 {
     Q_Q(const QGraphicsWidget);
@@ -903,4 +915,6 @@ void QGraphicsWidgetPrivate::setGeometryFromSetPos()
 
 QT_END_NAMESPACE
 
+#include "moc_qgraphicswidget.cpp"
+
 #endif //QT_NO_GRAPHICSVIEW
diff --git a/src/gui/graphicsview/qgraphicswidget_p.h b/src/gui/graphicsview/qgraphicswidget_p.h
index 398abc3..6ea2586 100644
--- a/src/gui/graphicsview/qgraphicswidget_p.h
+++ b/src/gui/graphicsview/qgraphicswidget_p.h
@@ -81,6 +81,7 @@ public:
           polished(0),
           inSetPos(0),
           autoFillBackground(0),
+          refCountInvokeRelayout(0),
           focusPolicy(Qt::NoFocus),
           focusNext(0),
           focusPrev(0),
@@ -106,6 +107,7 @@ public:
     QGraphicsLayout *layout;
     void setLayoutDirection_helper(Qt::LayoutDirection direction);
     void resolveLayoutDirection();
+    void _q_relayout();
 
     // Style
     QPalette palette;
@@ -179,11 +181,14 @@ public:
             return false;
         return (attributes & (1 << bit)) != 0;
     }
+    // 32 bits
+    quint32 refCountInvokeRelayout : 16;
     quint32 attributes : 10;
     quint32 inSetGeometry : 1;
     quint32 polished: 1;
     quint32 inSetPos : 1;
     quint32 autoFillBackground : 1;
+    quint32 padding : 2;    // feel free to use
 
     // Focus
     Qt::FocusPolicy focusPolicy;
diff --git a/src/gui/image/qpixmapdata_p.h b/src/gui/image/qpixmapdata_p.h
index 5b75aa1..f07843d 100644
--- a/src/gui/image/qpixmapdata_p.h
+++ b/src/gui/image/qpixmapdata_p.h
@@ -56,6 +56,10 @@
 #include <QtGui/qpixmap.h>
 #include <QtCore/qatomic.h>
 
+#ifdef Q_OS_SYMBIAN
+#include <QtGui/private/qvolatileimage_p.h>
+#endif
+
 QT_BEGIN_NAMESPACE
 
 class QImageReader;
@@ -135,6 +139,7 @@ public:
     }
 
 #if defined(Q_OS_SYMBIAN)
+    virtual QVolatileImage toVolatileImage() const { return QVolatileImage(); }
     virtual void* toNativeType(NativeType type);
     virtual void fromNativeType(void* pixmap, NativeType type);
 #endif
diff --git a/src/gui/inputmethod/qcoefepinputcontext_s60.cpp b/src/gui/inputmethod/qcoefepinputcontext_s60.cpp
index ebf0ff8..d603540 100644
--- a/src/gui/inputmethod/qcoefepinputcontext_s60.cpp
+++ b/src/gui/inputmethod/qcoefepinputcontext_s60.cpp
@@ -646,6 +646,7 @@ void QCoeFepInputContext::applyHints(Qt::InputMethodHints hints)
 {
     using namespace Qt;
 
+    reset();
     commitTemporaryPreeditString();
 
     const bool anynumbermodes = hints & (ImhDigitsOnly | ImhFormattedNumbersOnly | ImhDialableCharactersOnly);
diff --git a/src/gui/kernel/qapplication_qws.cpp b/src/gui/kernel/qapplication_qws.cpp
index abee361..3b6a075 100644
--- a/src/gui/kernel/qapplication_qws.cpp
+++ b/src/gui/kernel/qapplication_qws.cpp
@@ -209,7 +209,7 @@ QString qws_dataDir()
     if (!S_ISDIR(buf.st_mode))
         qFatal("%s is not a directory", dataDir.constData());
 
-#if !defined(Q_OS_INTEGRITY) && !defined(Q_OS_VXWORKS)
+#if !defined(Q_OS_INTEGRITY) && !defined(Q_OS_VXWORKS) && !defined(Q_OS_QNX)
     if (buf.st_uid != getuid())
         qFatal("Qt for Embedded Linux data directory is not owned by user %d", getuid());
 
diff --git a/src/gui/kernel/qapplication_s60.cpp b/src/gui/kernel/qapplication_s60.cpp
index 31d02d4..086cfec 100644
--- a/src/gui/kernel/qapplication_s60.cpp
+++ b/src/gui/kernel/qapplication_s60.cpp
@@ -1531,6 +1531,11 @@ void QSymbianControl::HandleResourceChange(int resourceType)
             QResizeEvent e(qt_desktopWidget->size(), qt_desktopWidget->size());
             QApplication::sendEvent(qt_desktopWidget, &e);
         }
+        // Send resize event to dialogs so they can adjust their position if necessary.
+        if (qwidget->windowType() & Qt::Dialog) {
+            QResizeEvent e(qwidget->size(), qwidget->size());
+            QApplication::sendEvent(qwidget, &e);
+        }
         break;
     }
 #endif
diff --git a/src/gui/kernel/qwidget_mac.mm b/src/gui/kernel/qwidget_mac.mm
index 778f1f1..b3bf365 100644
--- a/src/gui/kernel/qwidget_mac.mm
+++ b/src/gui/kernel/qwidget_mac.mm
@@ -4551,6 +4551,11 @@ void QWidgetPrivate::setGeometry_sys_helper(int x, int y, int w, int h, bool isM
 
     QPoint oldp = q->pos();
     QSize  olds = q->size();
+    // Apply size restrictions, applicable for Windows & Widgets.
+    if (QWExtra *extra = extraData()) {
+        w = qBound(extra->minw, w, extra->maxw);
+        h = qBound(extra->minh, h, extra->maxh);
+    }
     const bool isResize = (olds != QSize(w, h));
 
     if (!realWindow && !isResize && QPoint(x, y) == oldp)
@@ -4560,13 +4565,6 @@ void QWidgetPrivate::setGeometry_sys_helper(int x, int y, int w, int h, bool isM
         data.window_state = data.window_state & ~Qt::WindowMaximized;
 
     const bool visible = q->isVisible();
-    // Apply size restrictions, applicable for Windows & Widgets.
-    if (QWExtra *extra = extraData()) {
-        w = qMin(w, extra->maxw);
-        h = qMin(h, extra->maxh);
-        w = qMax(w, extra->minw);
-        h = qMax(h, extra->minh);
-    }
     data.crect = QRect(x, y, w, h);
 
     if (realWindow) {
diff --git a/src/gui/painting/qwindowsurface_qws.cpp b/src/gui/painting/qwindowsurface_qws.cpp
index 7e8cf9b..3789a33 100644
--- a/src/gui/painting/qwindowsurface_qws.cpp
+++ b/src/gui/painting/qwindowsurface_qws.cpp
@@ -1065,10 +1065,12 @@ bool QWSSharedMemSurface::setMemory(int memId)
         return true;
 
     mem.detach();
-    if (!mem.attach(memId)) {
+
+    if (memId != -1 && !mem.attach(memId)) {
+#ifndef QT_NO_DEBUG
         perror("QWSSharedMemSurface: attaching to shared memory");
-        qCritical("QWSSharedMemSurface: Error attaching to"
-                  " shared memory 0x%x", memId);
+        qCritical("QWSSharedMemSurface: Error attaching to shared memory 0x%x", memId);
+#endif
         return false;
     }
 
diff --git a/src/gui/text/qfontdatabase_qws.cpp b/src/gui/text/qfontdatabase_qws.cpp
index c83e929..313000f 100644
--- a/src/gui/text/qfontdatabase_qws.cpp
+++ b/src/gui/text/qfontdatabase_qws.cpp
@@ -75,6 +75,11 @@
 #include <qresource.h>
 #endif
 
+#ifdef Q_OS_QNX
+// ### using QFontEngineQPF leads to artifacts on QNX
+#  define QT_NO_QWS_SHARE_FONTS
+#endif
+
 QT_BEGIN_NAMESPACE
 
 #ifndef QT_NO_LIBRARY