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/****************************************************************************
**
** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the documentation of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
/*!
\page known-issues.html
\title Known Issues in %VERSION%
\ingroup platform-notes
\brief A summary of known issues in Qt %VERSION% at the time of release.
An up-to-date list of known issues with Qt %VERSION% can be found via the
\l{http://bugreports.qt.nokia.com/}{Qt Bug Tracker}.
\section1 General Issues
When running Qt applications on Windows or with \c{-graphicssystem raster},
any process that triggers a QWidget::update() from within a destructor
might result in a crash.
\section1 Issues with Third Party Software
\section2 X11 Hardware Support
\list
\o There is a bug in the 169.xx NVIDIA drivers on certain GeForce 8 series
cards that is triggered by the OpenGL paint engine when using QPainter
on a QGLWidget to draw paths and polygons. Some other painting
operations that end up in the path fallback are affected as well. The
bug causes the whole X server to repeatedly hang for several seconds at
a time.
\o There is an issue with NVIDIA's 9xxx driver series on X11 that causes a
crash in cases where there are several \l{QGLContext}s and the extended
composition modes are used (the composition modes between and including
QPainter::CompositionMode_Multiply and
QPainter::CompositionMode_Exclusion). This affects the composition mode
demo in Qt 4.5, for example. The crash does not occur in newer versions
of the drivers.
\endlist
\section2 Windows Hardware Support
\list
\o When using version 6.14.11.6921 of the NVIDIA drivers for the GeForce
6600 GT under Windows XP, Qt applications which use drag and drop will
display reduced size drag and drop icons when run alongside
applications that use OpenGL. This problem can be worked around by
reducing the level of graphics acceleration provided by the driver, or
by disabling hardware acceleration completely.
\endlist
\section2 Windows Software Issues
\list
\o When building Qt 4.5.0 with Windows 7, the build fails with an error
message regarding failing to embed manifest. This a known issue with
Windows 7, explained in the Windows 7 SDK Beta
\l{http://download.microsoft.com/download/8/8/0/8808A472-6450-4723-9C87-977069714B27/ReleaseNotes.Htm}
{release notes}. A workaround for this issue is to patch the
\bold{embed_manifest_exe.prf} file with the following:
\code
diff --git a/mkspecs/features/win32/embed_manifest_exe.prf b/mkspecs/features/win32/embed_manifest_exe.prf
index e1747f1..05f116e 100644
--- a/mkspecs/features/win32/embed_manifest_exe.prf
+++ b/mkspecs/features/win32/embed_manifest_exe.prf
@@ -8,4 +8,9 @@ if(win32-msvc2005|win32-msvc2008):!equals(TEMPLATE_PREFIX, "vc"):equals(TEMPLATE
QMAKE_POST_LINK = $$quote(mt.exe -nologo -manifest \"$$replace(OBJECTS_DIR,/,\\)\\$${NOPATH_TARGET}.intermediate.ma
nifest\" -outputresource:$(DESTDIR_TARGET);1$$escape_expand(\n\t))
QMAKE_POST_LINK += $$QMAKE_PREV_POST_LINK
QMAKE_CLEAN += \"$$replace(OBJECTS_DIR,/,\\)\\$${NOPATH_TARGET}.intermediate.manifest\"
+ isEmpty(RC_FILE) {
+ system("echo.>$$replace(OUT_PWD,/,\\)\\$$replace(OBJECTS_DIR,/,\\)\\Windows7WorkAround.rc")
+ RC_FILE = $$replace(OUT_PWD,/,\\)\\$$replace(OBJECTS_DIR,/,\\)\\Windows7WorkAround.rc
+ }
+
}
\endcode
\o With NVIDIA GeForce 7950 GT (driver version 6.14.11.7824), a fullscreen
QGLWidget flickers when child widgets are shown/hidden. The workaround
for this is to use \l{QWidget::}{setGeometry()} with a width/height 1
pixel bigger than your geometry and call \l{QWidget::}{show()}.
\o A bug in the Firebird database can cause an application to crash when
\c{fbembed.dll} is unloaded. The bug is fixed in version 2.5.
\endlist
\section2 Mac OS X Software Support
\list
\o If a sheet is opened for a given window, clicking the title bar of that
window will cause it to flash. This behavior has been reported to Apple
(bug number 5827676).
\endlist
*/
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