Application: kwin (4.6.2 (4.6.2))
KDE Platform Version: 4.6.2 (4.6.2)
Qt Version: 4.7.2
Operating System: Linux 2.6.38-8-generic i686
Distribution: Ubuntu 11.04

-- Information about the crash:
I was viewing a video online in firefox while this happened.  I clicked to enlarge the video to fullscreen and then kwin crashed.

-- Backtrace:
Application: KWin (kwin), signal: Segmentation fault
[Current thread is 1 (Thread 0xb7889720 (LWP 1851))]

Thread 3 (Thread 0xb2a27b70 (LWP 1890)):
#0  0x03324d41 in clock_gettime () from /lib/i386-linux-gnu/librt.so.1
#1  0x099bedd8 in do_gettime () at tools/qelapsedtimer_unix.cpp:123
#2  qt_gettime () at tools/qelapsedtimer_unix.cpp:140
#3  0x09a8b4f2 in updateCurrentTime (this=0x9e52408, tm=...) at kernel/qeventdispatcher_unix.cpp:339
#4  QTimerInfoList::timerWait (this=0x9e52408, tm=...) at kernel/qeventdispatcher_unix.cpp:442
#5  0x09a8d3a3 in QEventDispatcherUNIX::processEvents (this=0xa51e2b8, flags=...) at kernel/qeventdispatcher_unix.cpp:906
#6  0x09a5c289 in QEventLoop::processEvents (this=0xb2a27280, flags=...) at kernel/qeventloop.cpp:149
#7  0x09a5c522 in QEventLoop::exec (this=0xb2a27280, flags=...) at kernel/qeventloop.cpp:201
#8  0x099662a0 in QThread::exec (this=0x9e354c0) at thread/qthread.cpp:492
#9  0x09a3dfdb in QInotifyFileSystemWatcherEngine::run (this=0x9e354c0) at io/qfilesystemwatcher_inotify.cpp:248
#10 0x09968da2 in QThreadPrivate::start (arg=0x9e354c0) at thread/qthread_unix.cpp:320
#11 0x03ba5e99 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#12 0x001e073e in clone () from /lib/i386-linux-gnu/libc.so.6

Thread 2 (Thread 0xb2226b70 (LWP 1891)):
#0  0x006b2416 in __kernel_vsyscall ()
#1  0x03baa48c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/i386-linux-gnu/libpthread.so.0
#2  0x001ee3fd in pthread_cond_wait () from /lib/i386-linux-gnu/libc.so.6
#3  0x00e82817 in QTWTF::TCMalloc_PageHeap::scavengerThread (this=0xf961c0) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:2359
#4  0x00e82851 in QTWTF::TCMalloc_PageHeap::runScavengerThread (context=0xf961c0) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:1464
#5  0x03ba5e99 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#6  0x001e073e in clone () from /lib/i386-linux-gnu/libc.so.6

Thread 1 (Thread 0xb7889720 (LWP 1851)):
[KCrash Handler]
#7  intel_region_buffer (intel=0x9f9c770, region=0x0, flag=2) at intel_regions.c:514
#8  0x0384ece2 in intelClearWithBlit (ctx=0x9f9c770, mask=2) at intel_blit.c:262
#9  0x038514c0 in intelClear (ctx=0x9f9c770, mask=2) at intel_clear.c:177
#10 0x039d4512 in _mesa_Clear (mask=<value optimized out>) at main/clear.c:241
#11 0x005b884b in KWin::SceneOpenGL::paintBackground (this=0x9ebc920, region=...) at ../../kwin/scene_opengl.cpp:921
#12 0x005af562 in KWin::Scene::paintGenericScreen (this=0x9ebc920, orig_mask=32) at ../../kwin/scene.cpp:188
#13 0x005b8a31 in KWin::SceneOpenGL::paintGenericScreen (this=0x9ebc920, mask=32, data=...) at ../../kwin/scene_opengl.cpp:909
#14 0x005ac7c0 in KWin::Scene::finalPaintScreen (this=0x9ebc920, mask=32, region=..., data=...) at ../../kwin/scene.cpp:178
#15 0x005ce0fc in KWin::EffectsHandlerImpl::paintScreen (this=0xa2ae638, mask=32, region=..., data=...) at ../../kwin/effects.cpp:173
#16 0x0792e0e9 in KWin::StartupFeedbackEffect::paintScreen (this=0xa3e8fd8, mask=32, region=..., data=...) at ../../../kwin/effects/startupfeedback/startupfeedback.cpp:166
#17 0x005ce172 in KWin::EffectsHandlerImpl::paintScreen (this=0xa2ae638, mask=32, region=..., data=...) at ../../kwin/effects.cpp:169
#18 0x00302256 in KWin::Effect::paintScreen (this=0xa34e920, mask=32, region=..., data=...) at ../../../kwin/lib/kwineffects.cpp:227
#19 0x005ce172 in KWin::EffectsHandlerImpl::paintScreen (this=0xa2ae638, mask=32, region=..., data=...) at ../../kwin/effects.cpp:169
#20 0x078d007f in KWin::LogoutEffect::paintScreen (this=0xa3df008, mask=32, region=..., data=...) at ../../../kwin/effects/logout/logout.cpp:207
#21 0x005ce172 in KWin::EffectsHandlerImpl::paintScreen (this=0xa2ae638, mask=32, region=..., data=...) at ../../kwin/effects.cpp:169
#22 0x078ebb10 in KWin::ShadowEffect::paintScreen (this=0xa47ad18, mask=32, region=..., data=...) at ../../../kwin/effects/shadow/shadow.cpp:189
#23 0x005ce172 in KWin::EffectsHandlerImpl::paintScreen (this=0xa2ae638, mask=32, region=..., data=...) at ../../kwin/effects.cpp:169
#24 0x07900013 in KWin::BlurEffect::paintScreen (this=0xa2fcb50, mask=32, region=..., data=...) at ../../../kwin/effects/blur/blur.cpp:230
#25 0x005ce172 in KWin::EffectsHandlerImpl::paintScreen (this=0xa2ae638, mask=0, region=..., data=...) at ../../kwin/effects.cpp:169
#26 0x078d4e6f in KWin::PresentWindowsEffect::paintScreen (this=0xa2db290, mask=0, region=..., data=...) at ../../../kwin/effects/presentwindows/presentwindows.cpp:205
#27 0x005ce172 in KWin::EffectsHandlerImpl::paintScreen (this=0xa2ae638, mask=0, region=..., data=...) at ../../kwin/effects.cpp:169
#28 0x00302256 in KWin::Effect::paintScreen (this=0xa308ab0, mask=0, region=..., data=...) at ../../../kwin/lib/kwineffects.cpp:227
#29 0x005ce172 in KWin::EffectsHandlerImpl::paintScreen (this=0xa2ae638, mask=0, region=..., data=...) at ../../kwin/effects.cpp:169
#30 0x00302256 in KWin::Effect::paintScreen (this=0xa440d60, mask=0, region=..., data=...) at ../../../kwin/lib/kwineffects.cpp:227
#31 0x005ce172 in KWin::EffectsHandlerImpl::paintScreen (this=0xa2ae638, mask=0, region=..., data=...) at ../../kwin/effects.cpp:169
#32 0x00302256 in KWin::Effect::paintScreen (this=0xa44e250, mask=0, region=..., data=...) at ../../../kwin/lib/kwineffects.cpp:227
#33 0x005ce172 in KWin::EffectsHandlerImpl::paintScreen (this=0xa2ae638, mask=0, region=..., data=...) at ../../kwin/effects.cpp:169
#34 0x00302256 in KWin::Effect::paintScreen (this=0xa3613b8, mask=0, region=..., data=...) at ../../../kwin/lib/kwineffects.cpp:227
#35 0x005ce172 in KWin::EffectsHandlerImpl::paintScreen (this=0xa2ae638, mask=0, region=..., data=...) at ../../kwin/effects.cpp:169
#36 0x078bb7e9 in KWin::DesktopGridEffect::paintScreen (this=0xa2db5f0, mask=0, region=..., data=...) at ../../../kwin/effects/desktopgrid/desktopgrid.cpp:155
#37 0x005ce172 in KWin::EffectsHandlerImpl::paintScreen (this=0xa2ae638, mask=0, region=..., data=...) at ../../kwin/effects.cpp:169
#38 0x078f2ce2 in KWin::SlideEffect::paintScreen (this=0xa3531f0, mask=0, region=..., data=...) at ../../../kwin/effects/slide/slide.cpp:86
#39 0x005ce172 in KWin::EffectsHandlerImpl::paintScreen (this=0xa2ae638, mask=0, region=..., data=...) at ../../kwin/effects.cpp:169
#40 0x078b4799 in KWin::BoxSwitchEffect::paintScreen (this=0xa49b990, mask=0, region=..., data=...) at ../../../kwin/effects/boxswitch/boxswitch.cpp:143
#41 0x005ce172 in KWin::EffectsHandlerImpl::paintScreen (this=0xa2ae638, mask=0, region=..., data=...) at ../../kwin/effects.cpp:169
#42 0x0790ebcc in KWin::CubeEffect::paintScreen (this=0xa3e8bd8, mask=0, region=..., data=...) at ../../../kwin/effects/cube/cube.cpp:698
#43 0x005ce172 in KWin::EffectsHandlerImpl::paintScreen (this=0xa2ae638, mask=0, region=..., data=...) at ../../kwin/effects.cpp:169
#44 0x00302256 in KWin::Effect::paintScreen (this=0xa41ecb0, mask=0, region=..., data=...) at ../../../kwin/lib/kwineffects.cpp:227
#45 0x005ce172 in KWin::EffectsHandlerImpl::paintScreen (this=0xa2ae638, mask=0, region=..., data=...) at ../../kwin/effects.cpp:169
#46 0x00302256 in KWin::Effect::paintScreen (this=0xa30bd18, mask=0, region=..., data=...) at ../../../kwin/lib/kwineffects.cpp:227
#47 0x005ce172 in KWin::EffectsHandlerImpl::paintScreen (this=0xa2ae638, mask=0, region=..., data=...) at ../../kwin/effects.cpp:169
#48 0x00302256 in KWin::Effect::paintScreen (this=0xa3ff5f0, mask=0, region=..., data=...) at ../../../kwin/lib/kwineffects.cpp:227
#49 0x005ce172 in KWin::EffectsHandlerImpl::paintScreen (this=0xa2ae638, mask=0, region=..., data=...) at ../../kwin/effects.cpp:169
#50 0x07907a0c in KWin::CoverSwitchEffect::paintScreen (this=0xa3dedf0, mask=0, region=..., data=...) at ../../../kwin/effects/coverswitch/coverswitch.cpp:126
#51 0x005ce172 in KWin::EffectsHandlerImpl::paintScreen (this=0xa2ae638, mask=0, region=..., data=...) at ../../kwin/effects.cpp:169
#52 0x00302256 in KWin::Effect::paintScreen (this=0xa2ff588, mask=0, region=..., data=...) at ../../../kwin/lib/kwineffects.cpp:227
#53 0x005ce172 in KWin::EffectsHandlerImpl::paintScreen (this=0xa2ae638, mask=0, region=..., data=...) at ../../kwin/effects.cpp:169
#54 0x00302256 in KWin::Effect::paintScreen (this=0xa306940, mask=0, region=..., data=...) at ../../../kwin/lib/kwineffects.cpp:227
#55 0x005ce172 in KWin::EffectsHandlerImpl::paintScreen (this=0xa2ae638, mask=0, region=..., data=...) at ../../kwin/effects.cpp:169
#56 0x078fd0c1 in KWin::ZoomEffect::paintScreen (this=0xa3ab6c8, mask=0, region=..., data=...) at ../../../kwin/effects/zoom/zoom.cpp:341
#57 0x005ce172 in KWin::EffectsHandlerImpl::paintScreen (this=0xa2ae638, mask=0, region=..., data=...) at ../../kwin/effects.cpp:169
#58 0x005ad98c in KWin::Scene::paintScreen (this=0x9ebc920, mask=0xbfc160d8, region=0xbfc16160) at ../../kwin/scene.cpp:137
#59 0x005c4962 in KWin::SceneOpenGL::paint (this=0x9ebc920, damage=..., toplevels=...) at ../../kwin/scene_opengl.cpp:772
#60 0x005a9886 in KWin::Workspace::performCompositing (this=0xb404c2e0) at ../../kwin/composite.cpp:448
#61 0x09a72214 in QObject::event (this=0xb404c2e0, e=0xbfc1668c) at kernel/qobject.cpp:1190
#62 0x04332d24 in QApplicationPrivate::notify_helper (this=0x9dbe8c0, receiver=0xb404c2e0, e=0xbfc1668c) at kernel/qapplication.cpp:4462
#63 0x043378ce in QApplication::notify (this=0xbfc169a4, receiver=0xb404c2e0, e=0xbfc1668c) at kernel/qapplication.cpp:3862
#64 0x008943ca in KApplication::notify (this=0xbfc169a4, receiver=0xb404c2e0, event=0xbfc1668c) at ../../kdeui/kernel/kapplication.cpp:311
#65 0x00538abf in KWin::Application::notify (this=0xbfc169a4, o=0xb404c2e0, e=0xbfc1668c) at ../../kwin/main.cpp:376
#66 0x09a5d0bb in QCoreApplication::notifyInternal (this=0xbfc169a4, receiver=0xb404c2e0, event=0xbfc1668c) at kernel/qcoreapplication.cpp:731
#67 0x09a8d1e4 in sendEvent (this=0x9dc3b88) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#68 QTimerInfoList::activateTimers (this=0x9dc3b88) at kernel/qeventdispatcher_unix.cpp:604
#69 0x09a8d338 in QEventDispatcherUNIX::processEvents (this=0x9d7daa8, flags=...) at kernel/qeventdispatcher_unix.cpp:923
#70 0x043e77ea in QEventDispatcherX11::processEvents (this=0x9d7daa8, flags=...) at kernel/qeventdispatcher_x11.cpp:152
#71 0x09a5c289 in QEventLoop::processEvents (this=0xbfc168e4, flags=...) at kernel/qeventloop.cpp:149
#72 0x09a5c522 in QEventLoop::exec (this=0xbfc168e4, flags=...) at kernel/qeventloop.cpp:201
#73 0x09a60ecc in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1008
#74 0x043308e7 in QApplication::exec () at kernel/qapplication.cpp:3736
#75 0x0053b5b2 in kdemain (argc=3, argv=0xbfc16c24) at ../../kwin/main.cpp:542
#76 0x080485bb in main (argc=3, argv=0xbfc16c24) at kwin_dummy.cpp:3

Possible duplicates by query: bug 272069, bug 272021, bug 272011, bug 271964, bug 271905.

Reported using DrKonqi