Application: kwin (4.5.2 (KDE 4.5.2))
KDE Platform Version: 4.5.2 (KDE 4.5.2)
Qt Version: 4.7.0
Operating System: Linux 2.6.36-0.30.rc6.git0.fc15.x86_64 x86_64
Distribution: "Fedora release 15 (Rawhide)"

-- Information about the crash:
Was trying to switch 'Boxed' switching to Present Windows and then pressed tab, kwin then crashed.

-- Backtrace:
Application: KWin (kwin), signal: Segmentation fault
82	T_PSEUDO (SYSCALL_SYMBOL, SYSCALL_NAME, SYSCALL_NARGS)
[KCrash Handler]
#6  dri2DrawableGetMSC (psc=0x22e2f70, pdraw=0x0, ust=0x7fffa2345998, msc=0x7fffa2345990, sbc=0x7fffa2345988) at dri2_glx.c:301
#7  0x000000308b823fed in __glXGetVideoSyncSGI (count=0x7fffa23459dc) at glxcmds.c:1781
#8  0x0000003a7acbcbb1 in KWin::SceneOpenGL::waitSync (this=<value optimized out>) at /usr/src/debug/kdebase-workspace-4.5.2/kwin/scene_opengl.cpp:781
#9  0x0000003a7acc1120 in KWin::SceneOpenGL::flushBuffer (this=0x22ea300, mask=<value optimized out>, damage=...) at /usr/src/debug/kdebase-workspace-4.5.2/kwin/scene_opengl.cpp:830
#10 0x0000003a7acc193a in KWin::SceneOpenGL::paint (this=0x22ea300, damage=..., toplevels=<value optimized out>) at /usr/src/debug/kdebase-workspace-4.5.2/kwin/scene_opengl.cpp:761
#11 0x0000003a7acae09c in KWin::Workspace::performCompositing (this=0x22fa2d0) at /usr/src/debug/kdebase-workspace-4.5.2/kwin/composite.cpp:454
#12 0x0000003a7ac34e3d in KWin::Workspace::qt_metacall (this=0x22fa2d0, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fffa2345e00) at /usr/src/debug/kdebase-workspace-4.5.2/x86_64-redhat-linux-gnu/kwin/workspace.moc:583
#13 0x000000308417002f in QMetaObject::activate (sender=0x22fa798, m=<value optimized out>, local_signal_index=<value optimized out>, argv=0x0) at kernel/qobject.cpp:3272
#14 0x000000308416f859 in QObject::event (this=0x22fa798, e=<value optimized out>) at kernel/qobject.cpp:1175
#15 0x00000030871b4b64 in QApplicationPrivate::notify_helper (this=0x21d6af0, receiver=0x22fa798, e=0x7fffa2346550) at kernel/qapplication.cpp:4396
#16 0x00000030871b95da in QApplication::notify (this=<value optimized out>, receiver=0x22fa798, e=0x7fffa2346550) at kernel/qapplication.cpp:4277
#17 0x0000003a78c20416 in KApplication::notify(QObject*, QEvent*) () from /usr/lib64/libkdeui.so.5
#18 0x000000308415b7ac in QCoreApplication::notifyInternal (this=0x7fffa2346950, receiver=0x22fa798, event=0x7fffa2346550) at kernel/qcoreapplication.cpp:732
#19 0x00000030841893d2 in sendEvent (this=0x21d7500) at kernel/qcoreapplication.h:215
#20 QTimerInfoList::activateTimers (this=0x21d7500) at kernel/qeventdispatcher_unix.cpp:602
#21 0x0000003084189510 in QEventDispatcherUNIX::processEvents (this=0x21b38f0, flags=...) at kernel/qeventdispatcher_unix.cpp:923
#22 0x00000030872594dc in QEventDispatcherX11::processEvents (this=0x21b38f0, flags=...) at kernel/qeventdispatcher_x11.cpp:152
#23 0x000000308415ab42 in QEventLoop::processEvents (this=<value optimized out>, flags=...) at kernel/qeventloop.cpp:149
#24 0x000000308415ad8c in QEventLoop::exec (this=0x7fffa2346890, flags=...) at kernel/qeventloop.cpp:201
#25 0x000000308415f20b in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1009
#26 0x0000003a7ac50178 in kdemain (argc=<value optimized out>, argv=0x7fffa2346950) at /usr/src/debug/kdebase-workspace-4.5.2/kwin/main.cpp:531
#27 0x000000307941ee7d in __libc_start_main (main=0x400910 <main(int, char**)>, argc=3, ubp_av=0x7fffa2346f68, init=<value optimized out>, fini=<value optimized out>, rtld_fini=<value optimized out>, stack_end=0x7fffa2346f58) at libc-start.c:226
#28 0x0000000000400839 in _start ()

Possible duplicates by query: bug 253664, bug 252999, bug 252853, bug 249159, bug 247408.

Reported using DrKonqi