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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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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