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:
- What I was doing when the application crashed:
The screensaver was running  but when i tried to log in my session, the dialog box didn't appear fine, only the text box, an  some buttons after some mouse movements.

-- Backtrace:
Application: KWin (kwin), signal: Segmentation fault
[Current thread is 1 (Thread 0xb78b0720 (LWP 1346))]

Thread 3 (Thread 0xb2cccb70 (LWP 1352)):
#0  0x00ee0d41 in clock_gettime () from /lib/i386-linux-gnu/librt.so.1
#1  0x01759dd8 in do_gettime () at tools/qelapsedtimer_unix.cpp:123
#2  qt_gettime () at tools/qelapsedtimer_unix.cpp:140
#3  0x01827525 in updateCurrentTime (this=0x919df08, flags=..., timeout=0x0) at kernel/qeventdispatcher_unix.cpp:339
#4  QEventDispatcherUNIXPrivate::doSelect (this=0x919df08, flags=..., timeout=0x0) at kernel/qeventdispatcher_unix.cpp:182
#5  0x01828326 in QEventDispatcherUNIX::processEvents (this=0x93c6ad0, flags=...) at kernel/qeventdispatcher_unix.cpp:919
#6  0x017f7289 in QEventLoop::processEvents (this=0xb2ccc280, flags=...) at kernel/qeventloop.cpp:149
#7  0x017f7522 in QEventLoop::exec (this=0xb2ccc280, flags=...) at kernel/qeventloop.cpp:201
#8  0x017012a0 in QThread::exec (this=0x919aab8) at thread/qthread.cpp:492
#9  0x017d8fdb in QInotifyFileSystemWatcherEngine::run (this=0x919aab8) at io/qfilesystemwatcher_inotify.cpp:248
#10 0x01703da2 in QThreadPrivate::start (arg=0x919aab8) at thread/qthread_unix.cpp:320
#11 0x013e9e99 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#12 0x0023173e in clone () from /lib/i386-linux-gnu/libc.so.6

Thread 2 (Thread 0xb24c3b70 (LWP 1353)):
#0  0x008b3416 in __kernel_vsyscall ()
#1  0x013ee48c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/i386-linux-gnu/libpthread.so.0
#2  0x0023f3fd in pthread_cond_wait () from /lib/i386-linux-gnu/libc.so.6
#3  0x00cd9817 in QTWTF::TCMalloc_PageHeap::scavengerThread (this=0xded1c0) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:2359
#4  0x00cd9851 in QTWTF::TCMalloc_PageHeap::runScavengerThread (context=0xded1c0) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:1464
#5  0x013e9e99 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#6  0x0023173e in clone () from /lib/i386-linux-gnu/libc.so.6

Thread 1 (Thread 0xb78b0720 (LWP 1346)):
[KCrash Handler]
#7  intel_region_buffer (intel=0x8de2650, region=0x0, flag=2) at intel_regions.c:514
#8  0x052c7ce2 in intelClearWithBlit (ctx=0x8de2650, mask=2) at intel_blit.c:262
#9  0x052ca4c0 in intelClear (ctx=0x8de2650, mask=2) at intel_clear.c:177
#10 0x04739512 in _mesa_Clear (mask=<value optimized out>) at main/clear.c:241
#11 0x0042984b in KWin::SceneOpenGL::paintBackground (this=0x8e0cd88, region=...) at ../../kwin/scene_opengl.cpp:921
#12 0x00420562 in KWin::Scene::paintGenericScreen (this=0x8e0cd88, orig_mask=40) at ../../kwin/scene.cpp:188
#13 0x00429a31 in KWin::SceneOpenGL::paintGenericScreen (this=0x8e0cd88, mask=40, data=...) at ../../kwin/scene_opengl.cpp:909
#14 0x0041d7c0 in KWin::Scene::finalPaintScreen (this=0x8e0cd88, mask=40, region=..., data=...) at ../../kwin/scene.cpp:178
#15 0x0043f0fc in KWin::EffectsHandlerImpl::paintScreen (this=0x9107e00, mask=40, region=..., data=...) at ../../kwin/effects.cpp:173
#16 0x049850e9 in KWin::StartupFeedbackEffect::paintScreen (this=0x9244c60, mask=40, region=..., data=...) at ../../../kwin/effects/startupfeedback/startupfeedback.cpp:166
#17 0x0043f172 in KWin::EffectsHandlerImpl::paintScreen (this=0x9107e00, mask=40, region=..., data=...) at ../../kwin/effects.cpp:169
#18 0x0082c256 in KWin::Effect::paintScreen (this=0x9358808, mask=40, region=..., data=...) at ../../../kwin/lib/kwineffects.cpp:227
#19 0x0043f172 in KWin::EffectsHandlerImpl::paintScreen (this=0x9107e00, mask=40, region=..., data=...) at ../../kwin/effects.cpp:169
#20 0x0492707f in KWin::LogoutEffect::paintScreen (this=0x92b5af0, mask=40, region=..., data=...) at ../../../kwin/effects/logout/logout.cpp:207
#21 0x0043f172 in KWin::EffectsHandlerImpl::paintScreen (this=0x9107e00, mask=40, region=..., data=...) at ../../kwin/effects.cpp:169
#22 0x04942b10 in KWin::ShadowEffect::paintScreen (this=0x9341338, mask=40, region=..., data=...) at ../../../kwin/effects/shadow/shadow.cpp:189
#23 0x0043f172 in KWin::EffectsHandlerImpl::paintScreen (this=0x9107e00, mask=40, region=..., data=...) at ../../kwin/effects.cpp:169
#24 0x04957013 in KWin::BlurEffect::paintScreen (this=0x91773e0, mask=40, region=..., data=...) at ../../../kwin/effects/blur/blur.cpp:230
#25 0x0043f172 in KWin::EffectsHandlerImpl::paintScreen (this=0x9107e00, mask=8, region=..., data=...) at ../../kwin/effects.cpp:169
#26 0x0492be6f in KWin::PresentWindowsEffect::paintScreen (this=0x9168f70, mask=8, region=..., data=...) at ../../../kwin/effects/presentwindows/presentwindows.cpp:205
#27 0x0043f172 in KWin::EffectsHandlerImpl::paintScreen (this=0x9107e00, mask=8, region=..., data=...) at ../../kwin/effects.cpp:169
#28 0x0082c256 in KWin::Effect::paintScreen (this=0x9244c30, mask=8, region=..., data=...) at ../../../kwin/lib/kwineffects.cpp:227
#29 0x0043f172 in KWin::EffectsHandlerImpl::paintScreen (this=0x9107e00, mask=8, region=..., data=...) at ../../kwin/effects.cpp:169
#30 0x0082c256 in KWin::Effect::paintScreen (this=0x928c940, mask=8, region=..., data=...) at ../../../kwin/lib/kwineffects.cpp:227
#31 0x0043f172 in KWin::EffectsHandlerImpl::paintScreen (this=0x9107e00, mask=8, region=..., data=...) at ../../kwin/effects.cpp:169
#32 0x0082c256 in KWin::Effect::paintScreen (this=0x91c1600, mask=8, region=..., data=...) at ../../../kwin/lib/kwineffects.cpp:227
#33 0x0043f172 in KWin::EffectsHandlerImpl::paintScreen (this=0x9107e00, mask=8, region=..., data=...) at ../../kwin/effects.cpp:169
#34 0x0082c256 in KWin::Effect::paintScreen (this=0x91df038, mask=8, region=..., data=...) at ../../../kwin/lib/kwineffects.cpp:227
#35 0x0043f172 in KWin::EffectsHandlerImpl::paintScreen (this=0x9107e00, mask=8, region=..., data=...) at ../../kwin/effects.cpp:169
#36 0x049127e9 in KWin::DesktopGridEffect::paintScreen (this=0x9346328, mask=8, region=..., data=...) at ../../../kwin/effects/desktopgrid/desktopgrid.cpp:155
#37 0x0043f172 in KWin::EffectsHandlerImpl::paintScreen (this=0x9107e00, mask=8, region=..., data=...) at ../../kwin/effects.cpp:169
#38 0x04949ce2 in KWin::SlideEffect::paintScreen (this=0x9341958, mask=8, region=..., data=...) at ../../../kwin/effects/slide/slide.cpp:86
#39 0x0043f172 in KWin::EffectsHandlerImpl::paintScreen (this=0x9107e00, mask=8, region=..., data=...) at ../../kwin/effects.cpp:169
#40 0x0490b799 in KWin::BoxSwitchEffect::paintScreen (this=0x92b5fc0, mask=8, region=..., data=...) at ../../../kwin/effects/boxswitch/boxswitch.cpp:143
#41 0x0043f172 in KWin::EffectsHandlerImpl::paintScreen (this=0x9107e00, mask=8, region=..., data=...) at ../../kwin/effects.cpp:169
#42 0x04965bcc in KWin::CubeEffect::paintScreen (this=0x9252f90, mask=8, region=..., data=...) at ../../../kwin/effects/cube/cube.cpp:698
#43 0x0043f172 in KWin::EffectsHandlerImpl::paintScreen (this=0x9107e00, mask=8, region=..., data=...) at ../../kwin/effects.cpp:169
#44 0x0082c256 in KWin::Effect::paintScreen (this=0x9252f18, mask=8, region=..., data=...) at ../../../kwin/lib/kwineffects.cpp:227
#45 0x0043f172 in KWin::EffectsHandlerImpl::paintScreen (this=0x9107e00, mask=8, region=..., data=...) at ../../kwin/effects.cpp:169
#46 0x0082c256 in KWin::Effect::paintScreen (this=0x9242f98, mask=8, region=..., data=...) at ../../../kwin/lib/kwineffects.cpp:227
#47 0x0043f172 in KWin::EffectsHandlerImpl::paintScreen (this=0x9107e00, mask=8, region=..., data=...) at ../../kwin/effects.cpp:169
#48 0x0082c256 in KWin::Effect::paintScreen (this=0x91c4328, mask=8, region=..., data=...) at ../../../kwin/lib/kwineffects.cpp:227
#49 0x0043f172 in KWin::EffectsHandlerImpl::paintScreen (this=0x9107e00, mask=8, region=..., data=...) at ../../kwin/effects.cpp:169
#50 0x0495ea0c in KWin::CoverSwitchEffect::paintScreen (this=0x930ea48, mask=8, region=..., data=...) at ../../../kwin/effects/coverswitch/coverswitch.cpp:126
#51 0x0043f172 in KWin::EffectsHandlerImpl::paintScreen (this=0x9107e00, mask=8, region=..., data=...) at ../../kwin/effects.cpp:169
#52 0x0082c256 in KWin::Effect::paintScreen (this=0x9226c28, mask=8, region=..., data=...) at ../../../kwin/lib/kwineffects.cpp:227
#53 0x0043f172 in KWin::EffectsHandlerImpl::paintScreen (this=0x9107e00, mask=8, region=..., data=...) at ../../kwin/effects.cpp:169
#54 0x0082c256 in KWin::Effect::paintScreen (this=0x9153f60, mask=8, region=..., data=...) at ../../../kwin/lib/kwineffects.cpp:227
#55 0x0043f172 in KWin::EffectsHandlerImpl::paintScreen (this=0x9107e00, mask=8, region=..., data=...) at ../../kwin/effects.cpp:169
#56 0x0082c256 in KWin::Effect::paintScreen (this=0x9264178, mask=8, region=..., data=...) at ../../../kwin/lib/kwineffects.cpp:227
#57 0x0043f172 in KWin::EffectsHandlerImpl::paintScreen (this=0x9107e00, mask=8, region=..., data=...) at ../../kwin/effects.cpp:169
#58 0x049540c1 in KWin::ZoomEffect::paintScreen (this=0x930ecb8, mask=8, region=..., data=...) at ../../../kwin/effects/zoom/zoom.cpp:341
#59 0x0043f172 in KWin::EffectsHandlerImpl::paintScreen (this=0x9107e00, mask=8, region=..., data=...) at ../../kwin/effects.cpp:169
#60 0x0041e98c in KWin::Scene::paintScreen (this=0x8e0cd88, mask=0xbf926388, region=0xbf926410) at ../../kwin/scene.cpp:137
#61 0x00435962 in KWin::SceneOpenGL::paint (this=0x8e0cd88, damage=..., toplevels=...) at ../../kwin/scene_opengl.cpp:772
#62 0x0041a886 in KWin::Workspace::performCompositing (this=0x91128f0) at ../../kwin/composite.cpp:448
#63 0x0180d214 in QObject::event (this=0x91128f0, e=0xbf92693c) at kernel/qobject.cpp:1190
#64 0x027e7d24 in QApplicationPrivate::notify_helper (this=0x8d33718, receiver=0x91128f0, e=0xbf92693c) at kernel/qapplication.cpp:4462
#65 0x027ec8ce in QApplication::notify (this=0xbf926c54, receiver=0x91128f0, e=0xbf92693c) at kernel/qapplication.cpp:3862
#66 0x006553ca in KApplication::notify (this=0xbf926c54, receiver=0x91128f0, event=0xbf92693c) at ../../kdeui/kernel/kapplication.cpp:311
#67 0x003a9abf in KWin::Application::notify (this=0xbf926c54, o=0x91128f0, e=0xbf92693c) at ../../kwin/main.cpp:376
#68 0x017f80bb in QCoreApplication::notifyInternal (this=0xbf926c54, receiver=0x91128f0, event=0xbf92693c) at kernel/qcoreapplication.cpp:731
#69 0x018281e4 in sendEvent (this=0x8d35f68) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#70 QTimerInfoList::activateTimers (this=0x8d35f68) at kernel/qeventdispatcher_unix.cpp:604
#71 0x01828338 in QEventDispatcherUNIX::processEvents (this=0x8cf3ac0, flags=...) at kernel/qeventdispatcher_unix.cpp:923
#72 0x0289c7ea in QEventDispatcherX11::processEvents (this=0x8cf3ac0, flags=...) at kernel/qeventdispatcher_x11.cpp:152
#73 0x017f7289 in QEventLoop::processEvents (this=0xbf926b94, flags=...) at kernel/qeventloop.cpp:149
#74 0x017f7522 in QEventLoop::exec (this=0xbf926b94, flags=...) at kernel/qeventloop.cpp:201
#75 0x017fbecc in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1008
#76 0x027e58e7 in QApplication::exec () at kernel/qapplication.cpp:3736
#77 0x003ac5b2 in kdemain (argc=3, argv=0xbf926ed4) at ../../kwin/main.cpp:542
#78 0x080485bb in main (argc=3, argv=0xbf926ed4) at kwin_dummy.cpp:3

Possible duplicates by query: bug 272696, bug 272690, bug 272646, bug 272524, bug 272506.

Reported using DrKonqi