| 1 | /****************************************************************************
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| 2 | **
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| 3 | ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
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| 4 | ** Contact: Qt Software Information ([email protected])
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| 5 | **
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| 6 | ** This file is part of the documentation of the Qt Toolkit.
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| 7 | **
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| 8 | ** $QT_BEGIN_LICENSE:LGPL$
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| 9 | ** Commercial Usage
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| 10 | ** Licensees holding valid Qt Commercial licenses may use this file in
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| 11 | ** accordance with the Qt Commercial License Agreement provided with the
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| 12 | ** Software or, alternatively, in accordance with the terms contained in
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| 13 | ** a written agreement between you and Nokia.
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| 14 | **
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| 15 | ** GNU Lesser General Public License Usage
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| 16 | ** Alternatively, this file may be used under the terms of the GNU Lesser
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| 17 | ** General Public License version 2.1 as published by the Free Software
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| 18 | ** Foundation and appearing in the file LICENSE.LGPL included in the
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| 19 | ** packaging of this file. Please review the following information to
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| 20 | ** ensure the GNU Lesser General Public License version 2.1 requirements
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| 21 | ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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| 22 | **
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| 23 | ** In addition, as a special exception, Nokia gives you certain
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| 24 | ** additional rights. These rights are described in the Nokia Qt LGPL
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| 25 | ** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
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| 26 | ** package.
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| 27 | **
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| 28 | ** GNU General Public License Usage
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| 29 | ** Alternatively, this file may be used under the terms of the GNU
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| 30 | ** General Public License version 3.0 as published by the Free Software
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| 31 | ** Foundation and appearing in the file LICENSE.GPL included in the
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| 32 | ** packaging of this file. Please review the following information to
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| 33 | ** ensure the GNU General Public License version 3.0 requirements will be
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| 34 | ** met: http://www.gnu.org/copyleft/gpl.html.
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| 35 | **
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| 36 | ** If you are unsure which license is appropriate for your use, please
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| 37 | ** contact the sales department at [email protected].
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| 38 | ** $QT_END_LICENSE$
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| 39 | **
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| 40 | ****************************************************************************/
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| 41 |
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| 42 | /*!
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| 43 | \page known-issues.html
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| 44 | \title Known Issues in 4.5.1
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| 45 | \ingroup platform-notes
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| 46 | \brief A summary of known issues in Qt 4.5.1 at the time of release.
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| 47 |
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| 48 | An up-to-date list of known issues with Qt 4.5.1 can be found via the
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| 49 | \l{Task Tracker} on the Qt website which provides additional information
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| 50 | about known issues and tasks related to Qt.
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| 51 |
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| 52 | \section1 General Issues
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| 53 |
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| 54 | When running Qt applications on Windows or with \c{-graphicssystem raster},
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| 55 | any process that triggers a QWidget::update() from within a destructor
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| 56 | might result in a crash.
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| 57 |
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| 58 |
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| 59 | \section1 Issues with Third Party Software
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| 60 |
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| 61 | \section2 Intel Compiler Support
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| 62 |
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| 63 | Although it is possible to build applications against Qt 4.5.0 using Intel
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| 64 | CC 10, these applications will crash when run. A fix for this issue is
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| 65 | scheduled for Qt 4.5.1. We recommend that developers who rely on this
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| 66 | compiler wait until the fix is applied before upgrading to the Qt 4.5.x
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| 67 | series of releases.
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| 68 |
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| 69 | \section2 X11 Hardware Support
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| 70 |
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| 71 | \list
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| 72 | \o There is a bug in the 169.xx NVIDIA drivers on certain GeForce 8 series
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| 73 | cards that is triggered by the OpenGL paint engine when using QPainter
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| 74 | on a QGLWidget to draw paths and polygons. Some other painting
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| 75 | operations that end up in the path fallback are affected as well. The
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| 76 | bug causes the whole X server to repeatedly hang for several seconds at
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| 77 | a time.
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| 78 | \o There is an issue with NVIDIA's 9xxx driver series on X11 that causes a
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| 79 | crash in cases where there are several \l{QGLContext}s and the extended
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| 80 | composition modes are used (the composition modes between and including
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| 81 | QPainter::CompositionMode_Multiply and
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| 82 | QPainter::CompositionMode_Exclusion). This affects the composition mode
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| 83 | demo in Qt 4.5, for example. The crash does not occur in newer versions
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| 84 | of the drivers.
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| 85 | \endlist
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| 86 |
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| 87 | \section2 Windows Hardware Support
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| 88 |
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| 89 | \list
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| 90 | \o When using version 6.14.11.6921 of the NVIDIA drivers for the GeForce
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| 91 | 6600 GT under Windows XP, Qt applications which use drag and drop will
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| 92 | display reduced size drag and drop icons when run alongside
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| 93 | applications that use OpenGL. This problem can be worked around by
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| 94 | reducing the level of graphics acceleration provided by the driver, or
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| 95 | by disabling hardware acceleration completely.
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| 96 | \endlist
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| 97 |
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| 98 | \section2 Windows Software Issues
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| 99 |
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| 100 | \list
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| 101 |
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| 102 | \o When building Qt 4.5.0 with Windows 7, the build fails with an error
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| 103 | message regarding failing to embed manifest. This a known issue with
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| 104 | Windows 7, explained in the Windows 7 SDK Beta
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| 105 | \l{http://download.microsoft.com/download/8/8/0/8808A472-6450-4723-9C87-977069714B27/ReleaseNotes.Htm}
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| 106 | {release notes}. A workaround for this issue is to patch the
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| 107 | \bold{embed_manifest_exe.prf} file with the following:
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| 108 |
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| 109 | \code
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| 110 | diff --git a/mkspecs/features/win32/embed_manifest_exe.prf b/mkspecs/features/win32/embed_manifest_exe.prf
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| 111 | index e1747f1..05f116e 100644
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| 112 | --- a/mkspecs/features/win32/embed_manifest_exe.prf
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| 113 | +++ b/mkspecs/features/win32/embed_manifest_exe.prf
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| 114 | @@ -8,4 +8,9 @@ if(win32-msvc2005|win32-msvc2008):!equals(TEMPLATE_PREFIX, "vc"):equals(TEMPLATE
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| 115 | QMAKE_POST_LINK = $$quote(mt.exe -nologo -manifest \"$$replace(OBJECTS_DIR,/,\\)\\$${NOPATH_TARGET}.intermediate.ma
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| 116 | nifest\" -outputresource:$(DESTDIR_TARGET);1$$escape_expand(\n\t))
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| 117 | QMAKE_POST_LINK += $$QMAKE_PREV_POST_LINK
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| 118 | QMAKE_CLEAN += \"$$replace(OBJECTS_DIR,/,\\)\\$${NOPATH_TARGET}.intermediate.manifest\"
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| 119 | + isEmpty(RC_FILE) {
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| 120 | + system("echo.>$$replace(OUT_PWD,/,\\)\\$$replace(OBJECTS_DIR,/,\\)\\Windows7WorkAround.rc")
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| 121 | + RC_FILE = $$replace(OUT_PWD,/,\\)\\$$replace(OBJECTS_DIR,/,\\)\\Windows7WorkAround.rc
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| 122 | + }
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| 123 | +
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| 124 | }
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| 125 | \endcode
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| 126 |
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| 127 | \o Under certain circumstances Visual Studio Integration v1.4.0 will not
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| 128 | be able to install the integration for Visual Studio 2005 on Windows
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| 129 | Vista. An error message states that .NET Framework v2.0 Service Pack 1
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| 130 | is not installed. This is due to a problem with the built-in
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| 131 | installation of this on Windows Vista. This issue can be fixed by
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| 132 | installing .NET Framework version 3.5.
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| 133 |
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| 134 | \o With NVIDIA GeForce 7950 GT (driver version 6.14.11.7824), a fullscreen
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| 135 | QGLWidget flickers when child widgets are shown/hidden. The workaround
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| 136 | for this is to use \l{QWidget::}{setGeometry()} with a width/height 1
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| 137 | pixel bigger than your geometry and call \l{QWidget::}{show()}.
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| 138 |
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| 139 | \o A bug in the Firebird database can cause an application to crash when
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| 140 | \c{fbembed.dll} is unloaded. The bug is fixed in version 2.5.
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| 141 |
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| 142 | \endlist
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| 143 |
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| 144 | \section2 Mac OS X Software Support
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| 145 |
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| 146 | \list
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| 147 | \o If a sheet is opened for a given window, clicking the title bar of that
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| 148 | window will cause it to flash. This behavior has been reported to Apple
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| 149 | (bug number 5827676).
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| 150 | \endlist
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| 151 | */
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