diff --git a/src/corelib/serialization/qcborarray.cpp b/src/corelib/serialization/qcborarray.cpp
index 506fb052be..05403795b0 100644
--- a/src/corelib/serialization/qcborarray.cpp
+++ b/src/corelib/serialization/qcborarray.cpp
@@ -1181,6 +1181,11 @@ void QCborArray::detach(qsizetype reserved)
     Returns the offset of this iterator relative to \a other.
 */
 
+uint qHash(const QCborArray &array, uint seed)
+{
+    return qHashRange(array.begin(), array.end(), seed);
+}
+
 #if !defined(QT_NO_DEBUG_STREAM)
 QDebug operator<<(QDebug dbg, const QCborArray &a)
 {
diff --git a/src/corelib/serialization/qcborarray.h b/src/corelib/serialization/qcborarray.h
index 4e9f7cf9b5..6b07b52a02 100644
--- a/src/corelib/serialization/qcborarray.h
+++ b/src/corelib/serialization/qcborarray.h
@@ -286,6 +286,8 @@ inline QCborArray QCborValueRef::toArray(const QCborArray &a) const
     return concrete().toArray(a);
 }
 
+Q_CORE_EXPORT uint qHash(const QCborArray &array, uint seed = 0);
+
 #if !defined(QT_NO_DEBUG_STREAM)
 Q_CORE_EXPORT QDebug operator<<(QDebug, const QCborArray &a);
 #endif
diff --git a/src/corelib/serialization/qcbormap.cpp b/src/corelib/serialization/qcbormap.cpp
index f9b000393c..b18945ded1 100644
--- a/src/corelib/serialization/qcbormap.cpp
+++ b/src/corelib/serialization/qcbormap.cpp
@@ -1734,6 +1734,11 @@ void QCborMap::detach(qsizetype reserved)
     \sa operator+=(), operator-()
 */
 
+uint qHash(const QCborMap &map, uint seed)
+{
+    return qHashRange(map.begin(), map.end(), seed);
+}
+
 #if !defined(QT_NO_DEBUG_STREAM)
 QDebug operator<<(QDebug dbg, const QCborMap &m)
 {
diff --git a/src/corelib/serialization/qcbormap.h b/src/corelib/serialization/qcbormap.h
index 2e9422cf94..c895abfa59 100644
--- a/src/corelib/serialization/qcbormap.h
+++ b/src/corelib/serialization/qcbormap.h
@@ -337,6 +337,8 @@ inline QCborMap QCborValueRef::toMap(const QCborMap &m) const
     return concrete().toMap(m);
 }
 
+Q_CORE_EXPORT uint qHash(const QCborMap &map, uint seed = 0);
+
 #if !defined(QT_NO_DEBUG_STREAM)
 Q_CORE_EXPORT QDebug operator<<(QDebug, const QCborMap &m);
 #endif
diff --git a/src/corelib/serialization/qcborvalue.cpp b/src/corelib/serialization/qcborvalue.cpp
index c1d78ef738..077a4754dc 100644
--- a/src/corelib/serialization/qcborvalue.cpp
+++ b/src/corelib/serialization/qcborvalue.cpp
@@ -2365,6 +2365,53 @@ inline QCborMap::QCborMap(QCborContainerPrivate &dd) noexcept
 {
 }
 
+uint qHash(const QCborValue &value, uint seed)
+{
+    switch (value.type()) {
+    case QCborValue::Integer:
+        return qHash(value.toInteger(), seed);
+    case QCborValue::ByteArray:
+        return qHash(value.toByteArray(), seed);
+    case QCborValue::String:
+        return qHash(value.toString(), seed);
+    case QCborValue::Array:
+        return qHash(value.toArray(), seed);
+    case QCborValue::Map:
+        return qHash(value.toMap(), seed);
+    case QCborValue::Tag: {
+        QtPrivate::QHashCombine hash;
+        seed = hash(seed, value.tag());
+        seed = hash(seed, value.taggedValue());
+        return seed;
+    }
+    case QCborValue::SimpleType:
+        break;
+    case QCborValue::False:
+        return qHash(false, seed);
+    case QCborValue::True:
+        return qHash(true, seed);
+    case QCborValue::Null:
+        return qHash(nullptr, seed);
+    case QCborValue::Undefined:
+        return seed;
+    case QCborValue::Double:
+        return qHash(value.toDouble(), seed);
+    case QCborValue::DateTime:
+        return qHash(value.toDateTime(), seed);
+    case QCborValue::Url:
+        return qHash(value.toUrl(), seed);
+    case QCborValue::RegularExpression:
+        return qHash(value.toRegularExpression(), seed);
+    case QCborValue::Uuid:
+        return qHash(value.toUuid(), seed);
+    case QCborValue::Invalid:
+        return seed;
+    }
+
+    Q_ASSERT(value.isSimpleType());
+    return qHash(value.toSimpleType(), seed);
+}
+
 #if !defined(QT_NO_DEBUG_STREAM)
 static QDebug debugContents(QDebug &dbg, const QCborValue &v)
 {
diff --git a/src/corelib/serialization/qcborvalue.h b/src/corelib/serialization/qcborvalue.h
index f0bfa23392..6d9ed0810a 100644
--- a/src/corelib/serialization/qcborvalue.h
+++ b/src/corelib/serialization/qcborvalue.h
@@ -451,6 +451,8 @@ private:
     qsizetype i;
 };
 
+Q_CORE_EXPORT uint qHash(const QCborValue &value, uint seed = 0);
+
 #if !defined(QT_NO_DEBUG_STREAM)
 Q_CORE_EXPORT QDebug operator<<(QDebug, const QCborValue &v);
 #endif
diff --git a/src/corelib/serialization/qjsonarray.cpp b/src/corelib/serialization/qjsonarray.cpp
index 8ee9ce0de7..1187bb03a3 100644
--- a/src/corelib/serialization/qjsonarray.cpp
+++ b/src/corelib/serialization/qjsonarray.cpp
@@ -1237,6 +1237,10 @@ void QJsonArray::compact()
     a = static_cast<QJsonPrivate::Array *>(d->header->root());
 }
 
+uint qHash(const QJsonArray &array, uint seed)
+{
+    return qHashRange(array.begin(), array.end(), seed);
+}
 
 #if !defined(QT_NO_DEBUG_STREAM) && !defined(QT_JSON_READONLY)
 QDebug operator<<(QDebug dbg, const QJsonArray &a)
diff --git a/src/corelib/serialization/qjsonarray.h b/src/corelib/serialization/qjsonarray.h
index 8d41138c97..5dff4a0aa9 100644
--- a/src/corelib/serialization/qjsonarray.h
+++ b/src/corelib/serialization/qjsonarray.h
@@ -265,6 +265,8 @@ private:
 
 Q_DECLARE_SHARED_NOT_MOVABLE_UNTIL_QT6(QJsonArray)
 
+Q_CORE_EXPORT uint qHash(const QJsonArray &array, uint seed = 0);
+
 #if !defined(QT_NO_DEBUG_STREAM) && !defined(QT_JSON_READONLY)
 Q_CORE_EXPORT QDebug operator<<(QDebug, const QJsonArray &);
 #endif
diff --git a/src/corelib/serialization/qjsonobject.cpp b/src/corelib/serialization/qjsonobject.cpp
index 4a316c8a6f..950bec535b 100644
--- a/src/corelib/serialization/qjsonobject.cpp
+++ b/src/corelib/serialization/qjsonobject.cpp
@@ -1292,6 +1292,17 @@ void QJsonObject::setValueAt(int i, const QJsonValue &val)
     insert(e->key(), val);
 }
 
+uint qHash(const QJsonObject &object, uint seed)
+{
+    QtPrivate::QHashCombine hash;
+    for (auto it = object.begin(), end = object.end(); it != end; ++it) {
+        const QString key = it.key();
+        const QJsonValue value = it.value();
+        seed = hash(seed, std::pair<const QString&, const QJsonValue&>(key, value));
+    }
+    return seed;
+}
+
 #if !defined(QT_NO_DEBUG_STREAM) && !defined(QT_JSON_READONLY)
 QDebug operator<<(QDebug dbg, const QJsonObject &o)
 {
diff --git a/src/corelib/serialization/qjsonobject.h b/src/corelib/serialization/qjsonobject.h
index 610bce694c..be42d3747a 100644
--- a/src/corelib/serialization/qjsonobject.h
+++ b/src/corelib/serialization/qjsonobject.h
@@ -262,6 +262,8 @@ private:
 
 Q_DECLARE_SHARED_NOT_MOVABLE_UNTIL_QT6(QJsonObject)
 
+Q_CORE_EXPORT uint qHash(const QJsonObject &object, uint seed = 0);
+
 #if !defined(QT_NO_DEBUG_STREAM) && !defined(QT_JSON_READONLY)
 Q_CORE_EXPORT QDebug operator<<(QDebug, const QJsonObject &);
 #endif
diff --git a/src/corelib/serialization/qjsonvalue.cpp b/src/corelib/serialization/qjsonvalue.cpp
index 4469302e31..2c04da4885 100644
--- a/src/corelib/serialization/qjsonvalue.cpp
+++ b/src/corelib/serialization/qjsonvalue.cpp
@@ -876,6 +876,28 @@ QJsonValue QJsonValueRef::toValue() const
     return o->valueAt(index);
 }
 
+uint qHash(const QJsonValue &value, uint seed)
+{
+    switch (value.type()) {
+    case QJsonValue::Null:
+        return qHash(nullptr, seed);
+    case QJsonValue::Bool:
+        return qHash(value.toBool(), seed);
+    case QJsonValue::Double:
+        return qHash(value.toDouble(), seed);
+    case QJsonValue::String:
+        return qHash(value.toString(), seed);
+    case QJsonValue::Array:
+        return qHash(value.toArray(), seed);
+    case QJsonValue::Object:
+        return qHash(value.toObject(), seed);
+    case QJsonValue::Undefined:
+        return seed;
+    }
+    Q_UNREACHABLE();
+    return 0;
+}
+
 #if !defined(QT_NO_DEBUG_STREAM) && !defined(QT_JSON_READONLY)
 QDebug operator<<(QDebug dbg, const QJsonValue &o)
 {
diff --git a/src/corelib/serialization/qjsonvalue.h b/src/corelib/serialization/qjsonvalue.h
index 316d3fdf45..d8e121524d 100644
--- a/src/corelib/serialization/qjsonvalue.h
+++ b/src/corelib/serialization/qjsonvalue.h
@@ -247,6 +247,8 @@ public:
 
 Q_DECLARE_SHARED_NOT_MOVABLE_UNTIL_QT6(QJsonValue)
 
+Q_CORE_EXPORT uint qHash(const QJsonValue &value, uint seed = 0);
+
 #if !defined(QT_NO_DEBUG_STREAM) && !defined(QT_JSON_READONLY)
 Q_CORE_EXPORT QDebug operator<<(QDebug, const QJsonValue &);
 #endif
diff --git a/src/corelib/tools/qhashfunctions.h b/src/corelib/tools/qhashfunctions.h
index e6ae7a0b85..d013c26d66 100644
--- a/src/corelib/tools/qhashfunctions.h
+++ b/src/corelib/tools/qhashfunctions.h
@@ -104,6 +104,11 @@ Q_CORE_EXPORT Q_DECL_PURE_FUNCTION uint qHash(const QBitArray &key, uint seed =
 Q_CORE_EXPORT Q_DECL_PURE_FUNCTION uint qHash(QLatin1String key, uint seed = 0) Q_DECL_NOTHROW;
 Q_CORE_EXPORT Q_DECL_PURE_FUNCTION uint qt_hash(QStringView key, uint chained = 0) Q_DECL_NOTHROW;
 
+Q_DECL_CONST_FUNCTION inline uint qHash(std::nullptr_t, uint seed = 0) Q_DECL_NOTHROW
+{
+    return qHash(reinterpret_cast<quintptr>(nullptr), seed);
+}
+
 template <class T> inline uint qHash(const T *key, uint seed = 0) Q_DECL_NOTHROW
 {
     return qHash(reinterpret_cast<quintptr>(key), seed);
diff --git a/src/platformsupport/fontdatabases/windows/qwindowsfontdatabase.cpp b/src/platformsupport/fontdatabases/windows/qwindowsfontdatabase.cpp
index 953e2bf6be..890792fa2f 100644
--- a/src/platformsupport/fontdatabases/windows/qwindowsfontdatabase.cpp
+++ b/src/platformsupport/fontdatabases/windows/qwindowsfontdatabase.cpp
@@ -799,9 +799,9 @@ enum PlatformFieldValue {
     PlatformId_Microsoft = 3
 };
 
-FontNames qt_getCanonicalFontNames(const uchar *table, quint32 bytes)
+QFontNames qt_getCanonicalFontNames(const uchar *table, quint32 bytes)
 {
-    FontNames out;
+    QFontNames out;
     const int NameRecordSize = 12;
     const int MS_LangIdEnglish = 0x009;
 
@@ -947,7 +947,7 @@ QString qt_getEnglishName(const QString &familyName, bool includeStyle)
         goto error;
 
     {
-        const FontNames names = qt_getCanonicalFontNames(table, bytes);
+        const QFontNames names = qt_getCanonicalFontNames(table, bytes);
         i18n_name = names.name;
         if (includeStyle)
             i18n_name += QLatin1Char(' ') + names.style;
@@ -963,9 +963,9 @@ error:
 }
 
 // Note this duplicates parts of qt_getEnglishName, we should try to unify the two functions.
-FontNames qt_getCanonicalFontNames(const LOGFONT &lf)
+QFontNames qt_getCanonicalFontNames(const LOGFONT &lf)
 {
-    FontNames fontNames;
+    QFontNames fontNames;
     HDC hdc = GetDC(0);
     HFONT hfont = CreateFontIndirect(&lf);
 
@@ -1054,7 +1054,7 @@ static bool addFontToDatabase(QString familyName,
     QString subFamilyStyle;
     if (ttf) {
         // Look-up names registered in the font
-        FontNames canonicalNames = qt_getCanonicalFontNames(logFont);
+        QFontNames canonicalNames = qt_getCanonicalFontNames(logFont);
         if (qt_localizedName(familyName) && !canonicalNames.name.isEmpty())
             englishName = canonicalNames.name;
         if (!canonicalNames.preferredName.isEmpty()) {
@@ -1488,7 +1488,7 @@ static void getFontTable(const uchar *fileBegin, const uchar *data, quint32 tag,
 }
 
 static void getFamiliesAndSignatures(const QByteArray &fontData,
-                                     QList<FontNames> *families,
+                                     QList<QFontNames> *families,
                                      QVector<FONTSIGNATURE> *signatures)
 {
     const uchar *data = reinterpret_cast<const uchar *>(fontData.constData());
@@ -1504,7 +1504,7 @@ static void getFamiliesAndSignatures(const QByteArray &fontData,
         getFontTable(data, font, MAKE_TAG('n', 'a', 'm', 'e'), &table, &length);
         if (!table)
             continue;
-        FontNames names = qt_getCanonicalFontNames(table, length);
+        QFontNames names = qt_getCanonicalFontNames(table, length);
         if (names.name.isEmpty())
             continue;
 
@@ -1535,7 +1535,7 @@ QStringList QWindowsFontDatabase::addApplicationFont(const QByteArray &fontData,
     WinApplicationFont font;
     font.fileName = fileName;
     QVector<FONTSIGNATURE> signatures;
-    QList<FontNames> families;
+    QList<QFontNames> families;
     QStringList familyNames;
 
     if (!fontData.isEmpty()) {
diff --git a/src/platformsupport/fontdatabases/windows/qwindowsfontdatabase_ft.cpp b/src/platformsupport/fontdatabases/windows/qwindowsfontdatabase_ft.cpp
index 299dfd40cd..f68ea54dcf 100644
--- a/src/platformsupport/fontdatabases/windows/qwindowsfontdatabase_ft.cpp
+++ b/src/platformsupport/fontdatabases/windows/qwindowsfontdatabase_ft.cpp
@@ -210,7 +210,7 @@ static bool addFontToDatabase(QString familyName,
     QString subFamilyStyle;
     if (ttf) {
         // Look-up names registered in the font
-        FontNames canonicalNames = qt_getCanonicalFontNames(logFont);
+        QFontNames canonicalNames = qt_getCanonicalFontNames(logFont);
         if (qt_localizedName(familyName) && !canonicalNames.name.isEmpty())
             englishName = canonicalNames.name;
         if (!canonicalNames.preferredName.isEmpty()) {
diff --git a/src/platformsupport/fontdatabases/windows/qwindowsfontdatabase_p.h b/src/platformsupport/fontdatabases/windows/qwindowsfontdatabase_p.h
index 30f5beefdf..9080d3ea9d 100644
--- a/src/platformsupport/fontdatabases/windows/qwindowsfontdatabase_p.h
+++ b/src/platformsupport/fontdatabases/windows/qwindowsfontdatabase_p.h
@@ -168,7 +168,8 @@ inline quint16 qt_getUShort(const unsigned char *p)
     return val;
 }
 
-struct FontNames {
+struct QFontNames
+{
     QString name;   // e.g. "DejaVu Sans Condensed"
     QString style;  // e.g. "Italic"
     QString preferredName;  // e.g. "DejaVu Sans"
@@ -177,7 +178,7 @@ struct FontNames {
 
 bool qt_localizedName(const QString &name);
 QString qt_getEnglishName(const QString &familyName, bool includeStyle = false);
-FontNames qt_getCanonicalFontNames(const LOGFONT &lf);
+QFontNames qt_getCanonicalFontNames(const LOGFONT &lf);
 
 QT_END_NAMESPACE
 
diff --git a/src/plugins/platforms/windows/qwindowscontext.cpp b/src/plugins/platforms/windows/qwindowscontext.cpp
index e29e5b8187..0df6264bcb 100644
--- a/src/plugins/platforms/windows/qwindowscontext.cpp
+++ b/src/plugins/platforms/windows/qwindowscontext.cpp
@@ -197,6 +197,7 @@ void QWindowsUser32DLL::init()
         enableMouseInPointer = (EnableMouseInPointer)library.resolve("EnableMouseInPointer");
         getPointerType = (GetPointerType)library.resolve("GetPointerType");
         getPointerInfo = (GetPointerInfo)library.resolve("GetPointerInfo");
+        getPointerDeviceRects = (GetPointerDeviceRects)library.resolve("GetPointerDeviceRects");
         getPointerTouchInfo = (GetPointerTouchInfo)library.resolve("GetPointerTouchInfo");
         getPointerFrameTouchInfo = (GetPointerFrameTouchInfo)library.resolve("GetPointerFrameTouchInfo");
         getPointerPenInfo = (GetPointerPenInfo)library.resolve("GetPointerPenInfo");
@@ -212,7 +213,8 @@ void QWindowsUser32DLL::init()
 
 bool QWindowsUser32DLL::supportsPointerApi()
 {
-    return enableMouseInPointer && getPointerType && getPointerInfo && getPointerTouchInfo && getPointerFrameTouchInfo && getPointerPenInfo;
+    return enableMouseInPointer && getPointerType && getPointerInfo && getPointerDeviceRects
+            && getPointerTouchInfo && getPointerFrameTouchInfo && getPointerPenInfo;
 }
 
 void QWindowsShcoreDLL::init()
diff --git a/src/plugins/platforms/windows/qwindowscontext.h b/src/plugins/platforms/windows/qwindowscontext.h
index 3709d9deee..33bd42a669 100644
--- a/src/plugins/platforms/windows/qwindowscontext.h
+++ b/src/plugins/platforms/windows/qwindowscontext.h
@@ -89,6 +89,7 @@ struct QWindowsUser32DLL
     typedef BOOL (WINAPI *EnableMouseInPointer)(BOOL);
     typedef BOOL (WINAPI *GetPointerType)(UINT32, PVOID);
     typedef BOOL (WINAPI *GetPointerInfo)(UINT32, PVOID);
+    typedef BOOL (WINAPI *GetPointerDeviceRects)(HANDLE, RECT *, RECT *);
     typedef BOOL (WINAPI *GetPointerTouchInfo)(UINT32, PVOID);
     typedef BOOL (WINAPI *GetPointerFrameTouchInfo)(UINT32, UINT32 *, PVOID);
     typedef BOOL (WINAPI *GetPointerPenInfo)(UINT32, PVOID);
@@ -105,6 +106,7 @@ struct QWindowsUser32DLL
     EnableMouseInPointer enableMouseInPointer = nullptr;
     GetPointerType getPointerType = nullptr;
     GetPointerInfo getPointerInfo = nullptr;
+    GetPointerDeviceRects getPointerDeviceRects = nullptr;
     GetPointerTouchInfo getPointerTouchInfo = nullptr;
     GetPointerFrameTouchInfo getPointerFrameTouchInfo = nullptr;
     GetPointerPenInfo getPointerPenInfo = nullptr;
diff --git a/src/plugins/platforms/windows/qwindowspointerhandler.cpp b/src/plugins/platforms/windows/qwindowspointerhandler.cpp
index c11be972b0..abd4d56da0 100644
--- a/src/plugins/platforms/windows/qwindowspointerhandler.cpp
+++ b/src/plugins/platforms/windows/qwindowspointerhandler.cpp
@@ -428,9 +428,18 @@ bool QWindowsPointerHandler::translatePenEvent(QWindow *window, HWND hwnd, QtWin
         return false; // Let DefWindowProc() handle Non Client messages.
 
     POINTER_PEN_INFO *penInfo = static_cast<POINTER_PEN_INFO *>(vPenInfo);
+
+    RECT pRect, dRect;
+    if (!QWindowsContext::user32dll.getPointerDeviceRects(penInfo->pointerInfo.sourceDevice, &pRect, &dRect))
+        return false;
+
     const quint32 pointerId = penInfo->pointerInfo.pointerId;
     const QPoint globalPos = QPoint(penInfo->pointerInfo.ptPixelLocation.x, penInfo->pointerInfo.ptPixelLocation.y);
     const QPoint localPos = QWindowsGeometryHint::mapFromGlobal(hwnd, globalPos);
+    const QPointF hiResGlobalPos = QPointF(dRect.left + qreal(penInfo->pointerInfo.ptHimetricLocation.x - pRect.left)
+                                           / (pRect.right - pRect.left) * (dRect.right - dRect.left),
+                                           dRect.top + qreal(penInfo->pointerInfo.ptHimetricLocation.y - pRect.top)
+                                           / (pRect.bottom - pRect.top) * (dRect.bottom - dRect.top));
     const qreal pressure = (penInfo->penMask & PEN_MASK_PRESSURE) ? qreal(penInfo->pressure) / 1024.0 : 0.5;
     const qreal rotation = (penInfo->penMask & PEN_MASK_ROTATION) ? qreal(penInfo->rotation) : 0.0;
     const qreal tangentialPressure = 0.0;
@@ -438,6 +447,13 @@ bool QWindowsPointerHandler::translatePenEvent(QWindow *window, HWND hwnd, QtWin
     const int yTilt = (penInfo->penMask & PEN_MASK_TILT_Y) ? penInfo->tiltY : 0;
     const int z = 0;
 
+    if (QWindowsContext::verbose > 1)
+        qCDebug(lcQpaEvents).noquote().nospace() << showbase
+            << __FUNCTION__ << " pointerId=" << pointerId
+            << " globalPos=" << globalPos << " localPos=" << localPos << " hiResGlobalPos=" << hiResGlobalPos
+            << " message=" << hex << msg.message
+            << " flags=" << hex << penInfo->pointerInfo.pointerFlags;
+
     const QTabletEvent::TabletDevice device = QTabletEvent::Stylus;
     QTabletEvent::PointerType type;
     Qt::MouseButtons mouseButtons;
@@ -491,16 +507,18 @@ bool QWindowsPointerHandler::translatePenEvent(QWindow *window, HWND hwnd, QtWin
         }
         const Qt::KeyboardModifiers keyModifiers = QWindowsKeyMapper::queryKeyboardModifiers();
 
-        QWindowSystemInterface::handleTabletEvent(target, localPos, globalPos, device, type, mouseButtons,
+        QWindowSystemInterface::handleTabletEvent(target, localPos, hiResGlobalPos, device, type, mouseButtons,
                                                   pressure, xTilt, yTilt, tangentialPressure, rotation, z,
                                                   pointerId, keyModifiers);
 
-        QEvent::Type eventType;
-        Qt::MouseButton button;
-        getMouseEventInfo(msg.message, penInfo->pointerInfo.ButtonChangeType, globalPos, &eventType, &button);
+        if (!(QWindowsIntegration::instance()->options() & QWindowsIntegration::DontPassOsMouseEventsSynthesizedFromTouch)) {
+            QEvent::Type eventType;
+            Qt::MouseButton button;
+            getMouseEventInfo(msg.message, penInfo->pointerInfo.ButtonChangeType, globalPos, &eventType, &button);
 
-        QWindowSystemInterface::handleMouseEvent(target, localPos, globalPos, mouseButtons, button, eventType,
-                                                 keyModifiers, Qt::MouseEventSynthesizedByQt);
+            QWindowSystemInterface::handleMouseEvent(target, localPos, globalPos, mouseButtons, button, eventType,
+                                                     keyModifiers, Qt::MouseEventSynthesizedByQt);
+        }
         break;
     }
     }
diff --git a/src/printsupport/kernel/qprintengine_win.cpp b/src/printsupport/kernel/qprintengine_win.cpp
index 6f263e5ea8..5ee93a46b3 100644
--- a/src/printsupport/kernel/qprintengine_win.cpp
+++ b/src/printsupport/kernel/qprintengine_win.cpp
@@ -1779,39 +1779,26 @@ static void draw_text_item_win(const QPointF &pos, const QTextItemInt &ti, HDC h
         QTransform matrix = QTransform::fromTranslate(baseline_pos.x(), baseline_pos.y());
         ti.fontEngine->getGlyphPositions(ti.glyphs, matrix, ti.flags,
             _glyphs, positions);
-        if (_glyphs.size() == 0) {
+        if (_glyphs.isEmpty()) {
             SelectObject(hdc, old_font);
             return;
         }
 
-        bool outputEntireItem = _glyphs.size() > 0;
-
-        if (outputEntireItem) {
-            options |= ETO_PDY;
-            QVarLengthArray<INT> glyphDistances(_glyphs.size() * 2);
-            QVarLengthArray<wchar_t> g(_glyphs.size());
-            for (int i=0; i<_glyphs.size() - 1; ++i) {
-                glyphDistances[i * 2] = qRound(positions[i + 1].x) - qRound(positions[i].x);
-                glyphDistances[i * 2 + 1] = qRound(positions[i + 1].y) - qRound(positions[i].y);
-                g[i] = _glyphs[i];
-            }
-            glyphDistances[(_glyphs.size() - 1) * 2] = 0;
-            glyphDistances[(_glyphs.size() - 1) * 2 + 1] = 0;
-            g[_glyphs.size() - 1] = _glyphs[_glyphs.size() - 1];
-            ExtTextOut(hdc, qRound(positions[0].x), qRound(positions[0].y), options, 0,
-                       g.constData(), _glyphs.size(),
-                       glyphDistances.data());
-        } else {
-            int i = 0;
-            while(i < _glyphs.size()) {
-                wchar_t g = _glyphs[i];
-
-                ExtTextOut(hdc, qRound(positions[i].x),
-                           qRound(positions[i].y), options, 0,
-                           &g, 1, 0);
-                ++i;
-            }
+        options |= ETO_PDY;
+        QVarLengthArray<INT> glyphDistances(_glyphs.size() * 2);
+        QVarLengthArray<wchar_t> g(_glyphs.size());
+        const int lastGlyph = _glyphs.size() - 1;
+        for (int i = 0; i < lastGlyph; ++i) {
+            glyphDistances[i * 2] = qRound(positions[i + 1].x) - qRound(positions[i].x);
+            glyphDistances[i * 2 + 1] = qRound(positions[i + 1].y) - qRound(positions[i].y);
+            g[i] = _glyphs[i];
         }
+        glyphDistances[lastGlyph * 2] = 0;
+        glyphDistances[lastGlyph * 2 + 1] = 0;
+        g[lastGlyph] = _glyphs[lastGlyph];
+        ExtTextOut(hdc, qRound(positions[0].x), qRound(positions[0].y), options, nullptr,
+                   g.constData(), _glyphs.size(),
+                   glyphDistances.data());
     }
 
         win_xform.eM11 = win_xform.eM22 = 1.0;
diff --git a/src/sql/kernel/qsqlquery.cpp b/src/sql/kernel/qsqlquery.cpp
index 628bfa1880..daadcb8a0e 100644
--- a/src/sql/kernel/qsqlquery.cpp
+++ b/src/sql/kernel/qsqlquery.cpp
@@ -942,10 +942,12 @@ void QSqlQuery::clear()
   query. See the \l{QSqlQuery examples}{Detailed Description} for
   examples.
 
-  Portability note: Some databases choose to delay preparing a query
+  Portability notes: Some databases choose to delay preparing a query
   until it is executed the first time. In this case, preparing a
   syntactically wrong query succeeds, but every consecutive exec()
   will fail.
+  When the database does not support named placeholders directly,
+  the placeholder can only contain characters in the range [a-zA-Z0-9_].
 
   For SQLite, the query string can contain only one statement at a time.
   If more than one statement is given, the function returns \c false.
diff --git a/src/sql/models/qsqlquerymodel_p.h b/src/sql/models/qsqlquerymodel_p.h
index 76aaf00c88..d5ca2f89cb 100644
--- a/src/sql/models/qsqlquerymodel_p.h
+++ b/src/sql/models/qsqlquerymodel_p.h
@@ -75,7 +75,7 @@ public:
     void initColOffsets(int size);
     int columnInQuery(int modelColumn) const;
 
-    mutable QSqlQuery query;
+    mutable QSqlQuery query = { QSqlQuery(0) };
     mutable QSqlError error;
     QModelIndex bottom;
     QSqlRecord rec;
diff --git a/src/sql/models/qsqltablemodel_p.h b/src/sql/models/qsqltablemodel_p.h
index faa1b30803..bb568ab444 100644
--- a/src/sql/models/qsqltablemodel_p.h
+++ b/src/sql/models/qsqltablemodel_p.h
@@ -93,7 +93,7 @@ public:
     QSqlTableModel::EditStrategy strategy;
     bool busyInsertingRows;
 
-    QSqlQuery editQuery;
+    QSqlQuery editQuery = { QSqlQuery(0) };
     QSqlIndex primaryIndex;
     QString tableName;
     QString filter;
diff --git a/src/widgets/itemviews/qheaderview.cpp b/src/widgets/itemviews/qheaderview.cpp
index 70f8b28299..6857ccd8bb 100644
--- a/src/widgets/itemviews/qheaderview.cpp
+++ b/src/widgets/itemviews/qheaderview.cpp
@@ -3369,7 +3369,9 @@ void QHeaderViewPrivate::setupSectionIndicator(int section, int position)
     sectionIndicator->resize(w, h);
 #endif
 
-    QPixmap pm(w, h);
+    const qreal pixmapDevicePixelRatio = q->devicePixelRatioF();
+    QPixmap pm(QSize(w, h) * pixmapDevicePixelRatio);
+    pm.setDevicePixelRatio(pixmapDevicePixelRatio);
     pm.fill(QColor(0, 0, 0, 45));
     QRect rect(0, 0, w, h);
 
diff --git a/tests/auto/corelib/tools/qlocale/tst_qlocale.cpp b/tests/auto/corelib/tools/qlocale/tst_qlocale.cpp
index 011515dcba..4bfaf23d22 100644
--- a/tests/auto/corelib/tools/qlocale/tst_qlocale.cpp
+++ b/tests/auto/corelib/tools/qlocale/tst_qlocale.cpp
@@ -2744,6 +2744,37 @@ void tst_QLocale::formattedDataSize_data()
 #undef ROWQ
 #undef ROWB
     }
+
+    // Languages which don't use a Latin alphabet
+
+    const QLocale::DataSizeFormats iecFormat = QLocale::DataSizeIecFormat;
+    const QLocale::DataSizeFormats traditionalFormat = QLocale::DataSizeTraditionalFormat;
+    const QLocale::DataSizeFormats siFormat = QLocale::DataSizeSIFormat;
+    const QLocale::Language lang = QLocale::Russian;
+
+    QTest::newRow("Russian-IEC-0") << lang << 2 << iecFormat << 0 << QString("0 \u0431\u0430\u0439\u0442\u044B");
+    QTest::newRow("Russian-IEC-10") << lang << 2 << iecFormat << 10 << QString("10 \u0431\u0430\u0439\u0442\u044B");
+    // CLDR doesn't provide IEC prefixes (yet?) so they aren't getting translated
+    QTest::newRow("Russian-IEC-12Ki") << lang << 2 << iecFormat << 12345 << QString("12,06 KiB");
+    QTest::newRow("Russian-IEC-16Ki") << lang << 2 << iecFormat << 16384 << QString("16,00 KiB");
+    QTest::newRow("Russian-IEC-1235k") << lang << 2 << iecFormat << 1234567 << QString("1,18 MiB");
+    QTest::newRow("Russian-IEC-1374k") << lang << 2 << iecFormat << 1374744 << QString("1,31 MiB");
+    QTest::newRow("Russian-IEC-1234M") << lang << 2 << iecFormat << 1234567890 << QString("1,15 GiB");
+
+    QTest::newRow("Russian-Trad-0") << lang << 2 << traditionalFormat << 0 << QString("0 \u0431\u0430\u0439\u0442\u044B");
+    QTest::newRow("Russian-Trad-10") << lang << 2 << traditionalFormat << 10 << QString("10 \u0431\u0430\u0439\u0442\u044B");
+    QTest::newRow("Russian-Trad-12Ki") << lang << 2 << traditionalFormat << 12345 << QString("12,06 \u043A\u0411");
+    QTest::newRow("Russian-Trad-16Ki") << lang << 2 << traditionalFormat << 16384 << QString("16,00 \u043A\u0411");
+    QTest::newRow("Russian-Trad-1235k") << lang << 2 << traditionalFormat << 1234567 << QString("1,18 \u041C\u0411");
+    QTest::newRow("Russian-Trad-1374k") << lang << 2 << traditionalFormat << 1374744 << QString("1,31 \u041C\u0411");
+    QTest::newRow("Russian-Trad-1234M") << lang << 2 << traditionalFormat << 1234567890 << QString("1,15 \u0413\u0411");
+
+    QTest::newRow("Russian-Decimal-0") << lang << 2 << siFormat << 0 << QString("0 \u0431\u0430\u0439\u0442\u044B");
+    QTest::newRow("Russian-Decimal-10") << lang << 2 << siFormat << 10 << QString("10 \u0431\u0430\u0439\u0442\u044B");
+    QTest::newRow("Russian-Decimal-16Ki") << lang << 2 << siFormat << 16384 << QString("16,38 \u043A\u0411");
+    QTest::newRow("Russian-Decimal-1234k") << lang << 2 << siFormat << 1234567 << QString("1,23 \u041C\u0411");
+    QTest::newRow("Russian-Decimal-1374k") << lang << 2 << siFormat << 1374744 << QString("1,37 \u041C\u0411");
+    QTest::newRow("Russian-Decimal-1234M") << lang << 2 << siFormat << 1234567890 << QString("1,23 \u0413\u0411");
 }
 
 void tst_QLocale::formattedDataSize()
diff --git a/tests/auto/other/gestures/BLACKLIST b/tests/auto/other/gestures/BLACKLIST
index 7f36054c6e..ff6d2fa48e 100644
--- a/tests/auto/other/gestures/BLACKLIST
+++ b/tests/auto/other/gestures/BLACKLIST
@@ -1,5 +1,6 @@
 []
 rhel-7.4
+ubuntu-18.04
 [customGesture]
 # QTBUG-67254
 ubuntu
diff --git a/tests/auto/sql/models/qsqltablemodel/tst_qsqltablemodel.cpp b/tests/auto/sql/models/qsqltablemodel/tst_qsqltablemodel.cpp
index 430fa981d5..da31f437d9 100644
--- a/tests/auto/sql/models/qsqltablemodel/tst_qsqltablemodel.cpp
+++ b/tests/auto/sql/models/qsqltablemodel/tst_qsqltablemodel.cpp
@@ -31,11 +31,29 @@
 #include "../../kernel/qsqldatabase/tst_databases.h"
 #include <QtSql>
 #include <QtSql/private/qsqltablemodel_p.h>
+#include <QThread>
 
 const QString test(qTableName("test", __FILE__, QSqlDatabase())),
                    test2(qTableName("test2", __FILE__, QSqlDatabase())),
                    test3(qTableName("test3", __FILE__, QSqlDatabase()));
 
+// In order to catch when the warning message occurs, indicating that the database belongs to another
+// thread, we have to install our own message handler. To ensure that the test reporting still happens
+// as before, we call the originating one.
+//
+// For now, this is only called inside the modelInAnotherThread() test
+QtMessageHandler oldHandler = nullptr;
+
+void sqlTableModelMessageHandler(QtMsgType type, const QMessageLogContext &context, const QString &msg)
+{
+    if (type == QtWarningMsg &&
+        msg == "QSqlDatabasePrivate::database: requested database does not "
+               "belong to the calling thread.") {
+        QFAIL("Requested database does not belong to the calling thread.");
+    }
+    if (oldHandler)
+        oldHandler(type, context, msg);
+}
 
 class tst_QSqlTableModel : public QObject
 {
@@ -116,6 +134,7 @@ private slots:
 
     void sqlite_bigTable_data() { generic_data("QSQLITE"); }
     void sqlite_bigTable();
+    void modelInAnotherThread();
 
     // bug specific tests
     void insertRecordBeforeSelect_data() { generic_data(); }
@@ -276,6 +295,10 @@ void tst_QSqlTableModel::init()
 void tst_QSqlTableModel::cleanup()
 {
     recreateTestTables();
+    if (oldHandler) {
+        qInstallMessageHandler(oldHandler);
+        oldHandler = nullptr;
+    }
 }
 
 void tst_QSqlTableModel::select()
@@ -2100,5 +2123,29 @@ void tst_QSqlTableModel::invalidFilterAndHeaderData()
     QVERIFY(!v.isValid());
 }
 
+class SqlThread : public QThread
+{
+public:
+    SqlThread() : QThread() {}
+    void run()
+    {
+        QSqlDatabase db = QSqlDatabase::addDatabase("QSQLITE", "non-default-connection");
+        QSqlTableModel stm(nullptr, db);
+        isDone = true;
+    }
+    bool isDone = false;
+};
+
+void tst_QSqlTableModel::modelInAnotherThread()
+{
+    oldHandler = qInstallMessageHandler(sqlTableModelMessageHandler);
+    QSqlDatabase db = QSqlDatabase::addDatabase("QSQLITE");
+    CHECK_DATABASE(db);
+    SqlThread t;
+    t.start();
+    QTRY_VERIFY(t.isDone);
+    QVERIFY(t.isFinished());
+}
+
 QTEST_MAIN(tst_QSqlTableModel)
 #include "tst_qsqltablemodel.moc"