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:
trying to launch the applet (e.g. klickoff but it can be any other one) the computer slows down (this version of kde used to work normally with maverik). if i open a browser and try to open flash video in fullscreen, kwin crashes
- Unusual behavior I noticed:
transparency slows down my computer (on intel) very much. the systems disables all effects. after manual renewing the effects, the panels remains opaque and animations work seamlessly

-- Backtrace:
Application: KWin (kwin), signal: Segmentation fault
[Current thread is 1 (Thread 0xb76e0720 (LWP 1241))]

Thread 3 (Thread 0xb28b3b70 (LWP 1247)):
#0  0x02b53d41 in clock_gettime () from /lib/i386-linux-gnu/librt.so.1
#1  0x0593add8 in do_gettime () at tools/qelapsedtimer_unix.cpp:123
#2  qt_gettime () at tools/qelapsedtimer_unix.cpp:140
#3  0x05a074f2 in updateCurrentTime (this=0x9a2c128, tm=...) at kernel/qeventdispatcher_unix.cpp:339
#4  QTimerInfoList::timerWait (this=0x9a2c128, tm=...) at kernel/qeventdispatcher_unix.cpp:442
#5  0x05a093a3 in QEventDispatcherUNIX::processEvents (this=0x9c9de50, flags=...) at kernel/qeventdispatcher_unix.cpp:906
#6  0x059d8289 in QEventLoop::processEvents (this=0xb28b3280, flags=...) at kernel/qeventloop.cpp:149
#7  0x059d8522 in QEventLoop::exec (this=0xb28b3280, flags=...) at kernel/qeventloop.cpp:201
#8  0x058e22a0 in QThread::exec (this=0x9c5ed50) at thread/qthread.cpp:492
#9  0x059b9fdb in QInotifyFileSystemWatcherEngine::run (this=0x9c5ed50) at io/qfilesystemwatcher_inotify.cpp:248
#10 0x058e4da2 in QThreadPrivate::start (arg=0x9c5ed50) at thread/qthread_unix.cpp:320
#11 0x0283de99 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#12 0x0073a73e in clone () from /lib/i386-linux-gnu/libc.so.6

Thread 2 (Thread 0xb20aab70 (LWP 1248)):
#0  0x00e28416 in __kernel_vsyscall ()
#1  0x0284248c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/i386-linux-gnu/libpthread.so.0
#2  0x007483fd in pthread_cond_wait () from /lib/i386-linux-gnu/libc.so.6
#3  0x00fb0817 in QTWTF::TCMalloc_PageHeap::scavengerThread (this=0x10c41c0) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:2359
#4  0x00fb0851 in QTWTF::TCMalloc_PageHeap::runScavengerThread (context=0x10c41c0) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:1464
#5  0x0283de99 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#6  0x0073a73e in clone () from /lib/i386-linux-gnu/libc.so.6

Thread 1 (Thread 0xb76e0720 (LWP 1241)):
[KCrash Handler]
#7  intel_region_buffer (intel=0x9961dc0, region=0x0, flag=2) at intel_regions.c:514
#8  0x0386a742 in intelClearWithBlit (ctx=0x9961dc0, mask=2) at intel_blit.c:262
#9  0x03863670 in intelClear (ctx=0x9961dc0, mask=2) at intel_clear.c:177
#10 0x04a13512 in _mesa_Clear (mask=<value optimized out>) at main/clear.c:241
#11 0x0052684b in KWin::SceneOpenGL::paintBackground (this=0x9699970, region=...) at ../../kwin/scene_opengl.cpp:921
#12 0x0051d562 in KWin::Scene::paintGenericScreen (this=0x9699970, orig_mask=32) at ../../kwin/scene.cpp:188
#13 0x00526a31 in KWin::SceneOpenGL::paintGenericScreen (this=0x9699970, mask=32, data=...) at ../../kwin/scene_opengl.cpp:909
#14 0x0051a7c0 in KWin::Scene::finalPaintScreen (this=0x9699970, mask=32, region=..., data=...) at ../../kwin/scene.cpp:178
#15 0x0053c0fc in KWin::EffectsHandlerImpl::paintScreen (this=0x969c3f8, mask=32, region=..., data=...) at ../../kwin/effects.cpp:173
#16 0x03b1b0e9 in KWin::StartupFeedbackEffect::paintScreen (this=0x9cb2978, mask=32, region=..., data=...) at ../../../kwin/effects/startupfeedback/startupfeedback.cpp:166
#17 0x0053c172 in KWin::EffectsHandlerImpl::paintScreen (this=0x969c3f8, mask=32, region=..., data=...) at ../../kwin/effects.cpp:169
#18 0x0057f256 in KWin::Effect::paintScreen (this=0x9ac5388, mask=32, region=..., data=...) at ../../../kwin/lib/kwineffects.cpp:227
#19 0x0053c172 in KWin::EffectsHandlerImpl::paintScreen (this=0x969c3f8, mask=32, region=..., data=...) at ../../kwin/effects.cpp:169
#20 0x03abd07f in KWin::LogoutEffect::paintScreen (this=0x9c910a0, mask=32, region=..., data=...) at ../../../kwin/effects/logout/logout.cpp:207
#21 0x0053c172 in KWin::EffectsHandlerImpl::paintScreen (this=0x969c3f8, mask=32, region=..., data=...) at ../../kwin/effects.cpp:169
#22 0x03ad8b10 in KWin::ShadowEffect::paintScreen (this=0x9abdee0, mask=32, region=..., data=...) at ../../../kwin/effects/shadow/shadow.cpp:189
#23 0x0053c172 in KWin::EffectsHandlerImpl::paintScreen (this=0x969c3f8, mask=32, region=..., data=...) at ../../kwin/effects.cpp:169
#24 0x03aed013 in KWin::BlurEffect::paintScreen (this=0x9c8f770, mask=32, region=..., data=...) at ../../../kwin/effects/blur/blur.cpp:230
#25 0x0053c172 in KWin::EffectsHandlerImpl::paintScreen (this=0x969c3f8, mask=32, region=..., data=...) at ../../kwin/effects.cpp:169
#26 0x03ac1e6f in KWin::PresentWindowsEffect::paintScreen (this=0x9cc9708, mask=32, region=..., data=...) at ../../../kwin/effects/presentwindows/presentwindows.cpp:205
#27 0x0053c172 in KWin::EffectsHandlerImpl::paintScreen (this=0x969c3f8, mask=32, region=..., data=...) at ../../kwin/effects.cpp:169
#28 0x0057f256 in KWin::Effect::paintScreen (this=0x9ccb000, mask=32, region=..., data=...) at ../../../kwin/lib/kwineffects.cpp:227
#29 0x0053c172 in KWin::EffectsHandlerImpl::paintScreen (this=0x969c3f8, mask=32, region=..., data=...) at ../../kwin/effects.cpp:169
#30 0x0057f256 in KWin::Effect::paintScreen (this=0x9cb38f0, mask=32, region=..., data=...) at ../../../kwin/lib/kwineffects.cpp:227
#31 0x0053c172 in KWin::EffectsHandlerImpl::paintScreen (this=0x969c3f8, mask=32, region=..., data=...) at ../../kwin/effects.cpp:169
#32 0x0057f256 in KWin::Effect::paintScreen (this=0x9a06640, mask=32, region=..., data=...) at ../../../kwin/lib/kwineffects.cpp:227
#33 0x0053c172 in KWin::EffectsHandlerImpl::paintScreen (this=0x969c3f8, mask=32, region=..., data=...) at ../../kwin/effects.cpp:169
#34 0x0057f256 in KWin::Effect::paintScreen (this=0x9cb6268, mask=32, region=..., data=...) at ../../../kwin/lib/kwineffects.cpp:227
#35 0x0053c172 in KWin::EffectsHandlerImpl::paintScreen (this=0x969c3f8, mask=32, region=..., data=...) at ../../kwin/effects.cpp:169
#36 0x0057f256 in KWin::Effect::paintScreen (this=0x99d7ff8, mask=32, region=..., data=...) at ../../../kwin/lib/kwineffects.cpp:227
#37 0x0053c172 in KWin::EffectsHandlerImpl::paintScreen (this=0x969c3f8, mask=32, region=..., data=...) at ../../kwin/effects.cpp:169
#38 0x03aa87e9 in KWin::DesktopGridEffect::paintScreen (this=0x9c90cb0, mask=32, region=..., data=...) at ../../../kwin/effects/desktopgrid/desktopgrid.cpp:155
#39 0x0053c172 in KWin::EffectsHandlerImpl::paintScreen (this=0x969c3f8, mask=32, region=..., data=...) at ../../kwin/effects.cpp:169
#40 0x03adfce2 in KWin::SlideEffect::paintScreen (this=0x97b5328, mask=32, region=..., data=...) at ../../../kwin/effects/slide/slide.cpp:86
#41 0x0053c172 in KWin::EffectsHandlerImpl::paintScreen (this=0x969c3f8, mask=32, region=..., data=...) at ../../kwin/effects.cpp:169
#42 0x03aa1799 in KWin::BoxSwitchEffect::paintScreen (this=0x9cb7490, mask=32, region=..., data=...) at ../../../kwin/effects/boxswitch/boxswitch.cpp:143
#43 0x0053c172 in KWin::EffectsHandlerImpl::paintScreen (this=0x969c3f8, mask=32, region=..., data=...) at ../../kwin/effects.cpp:169
#44 0x03afbbcc in KWin::CubeEffect::paintScreen (this=0x9cb9838, mask=32, region=..., data=...) at ../../../kwin/effects/cube/cube.cpp:698
#45 0x0053c172 in KWin::EffectsHandlerImpl::paintScreen (this=0x969c3f8, mask=32, region=..., data=...) at ../../kwin/effects.cpp:169
#46 0x0057f256 in KWin::Effect::paintScreen (this=0x998bdf8, mask=32, region=..., data=...) at ../../../kwin/lib/kwineffects.cpp:227
#47 0x0053c172 in KWin::EffectsHandlerImpl::paintScreen (this=0x969c3f8, mask=32, region=..., data=...) at ../../kwin/effects.cpp:169
#48 0x0057f256 in KWin::Effect::paintScreen (this=0x98e2170, mask=32, region=..., data=...) at ../../../kwin/lib/kwineffects.cpp:227
#49 0x0053c172 in KWin::EffectsHandlerImpl::paintScreen (this=0x969c3f8, mask=32, region=..., data=...) at ../../kwin/effects.cpp:169
#50 0x0057f256 in KWin::Effect::paintScreen (this=0x98e4330, mask=32, region=..., data=...) at ../../../kwin/lib/kwineffects.cpp:227
#51 0x0053c172 in KWin::EffectsHandlerImpl::paintScreen (this=0x969c3f8, mask=32, region=..., data=...) at ../../kwin/effects.cpp:169
#52 0x0057f256 in KWin::Effect::paintScreen (this=0x979ab50, mask=32, region=..., data=...) at ../../../kwin/lib/kwineffects.cpp:227
#53 0x0053c172 in KWin::EffectsHandlerImpl::paintScreen (this=0x969c3f8, mask=32, region=..., data=...) at ../../kwin/effects.cpp:169
#54 0x03af4a0c in KWin::CoverSwitchEffect::paintScreen (this=0x98e9438, mask=32, region=..., data=...) at ../../../kwin/effects/coverswitch/coverswitch.cpp:126
#55 0x0053c172 in KWin::EffectsHandlerImpl::paintScreen (this=0x969c3f8, mask=32, region=..., data=...) at ../../kwin/effects.cpp:169
#56 0x0057f256 in KWin::Effect::paintScreen (this=0x9ad43f0, mask=32, region=..., data=...) at ../../../kwin/lib/kwineffects.cpp:227
#57 0x0053c172 in KWin::EffectsHandlerImpl::paintScreen (this=0x969c3f8, mask=32, region=..., data=...) at ../../kwin/effects.cpp:169
#58 0x0057f256 in KWin::Effect::paintScreen (this=0x9cabac8, mask=32, region=..., data=...) at ../../../kwin/lib/kwineffects.cpp:227
#59 0x0053c172 in KWin::EffectsHandlerImpl::paintScreen (this=0x969c3f8, mask=32, region=..., data=...) at ../../kwin/effects.cpp:169
#60 0x03b1d8c9 in KWin::TrackMouseEffect::paintScreen (this=0x97b5cb0, mask=32, region=..., data=...) at ../../../kwin/effects/trackmouse/trackmouse.cpp:112
#61 0x0053c172 in KWin::EffectsHandlerImpl::paintScreen (this=0x969c3f8, mask=32, region=..., data=...) at ../../kwin/effects.cpp:169
#62 0x03aea0c1 in KWin::ZoomEffect::paintScreen (this=0x9ccb430, mask=32, region=..., data=...) at ../../../kwin/effects/zoom/zoom.cpp:341
#63 0x0053c172 in KWin::EffectsHandlerImpl::paintScreen (this=0x969c3f8, mask=32, region=..., data=...) at ../../kwin/effects.cpp:169
#64 0x0051b98c in KWin::Scene::paintScreen (this=0x9699970, mask=0xbf9fc768, region=0xbf9fc7f0) at ../../kwin/scene.cpp:137
#65 0x00532962 in KWin::SceneOpenGL::paint (this=0x9699970, damage=..., toplevels=...) at ../../kwin/scene_opengl.cpp:772
#66 0x00517886 in KWin::Workspace::performCompositing (this=0x96b72d0) at ../../kwin/composite.cpp:448
#67 0x059ee214 in QObject::event (this=0x96b72d0, e=0xbf9fcd1c) at kernel/qobject.cpp:1190
#68 0x03fa8d24 in QApplicationPrivate::notify_helper (this=0x95c8dd0, receiver=0x96b72d0, e=0xbf9fcd1c) at kernel/qapplication.cpp:4462
#69 0x03fad8ce in QApplication::notify (this=0xbf9fd034, receiver=0x96b72d0, e=0xbf9fcd1c) at kernel/qapplication.cpp:3862
#70 0x00c483ca in KApplication::notify (this=0xbf9fd034, receiver=0x96b72d0, event=0xbf9fcd1c) at ../../kdeui/kernel/kapplication.cpp:311
#71 0x004a6abf in KWin::Application::notify (this=0xbf9fd034, o=0x96b72d0, e=0xbf9fcd1c) at ../../kwin/main.cpp:376
#72 0x059d90bb in QCoreApplication::notifyInternal (this=0xbf9fd034, receiver=0x96b72d0, event=0xbf9fcd1c) at kernel/qcoreapplication.cpp:731
#73 0x05a091e4 in sendEvent (this=0x95c9690) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#74 QTimerInfoList::activateTimers (this=0x95c9690) at kernel/qeventdispatcher_unix.cpp:604
#75 0x05a09338 in QEventDispatcherUNIX::processEvents (this=0x9586aa8, flags=...) at kernel/qeventdispatcher_unix.cpp:923
#76 0x0405d7ea in QEventDispatcherX11::processEvents (this=0x9586aa8, flags=...) at kernel/qeventdispatcher_x11.cpp:152
#77 0x059d8289 in QEventLoop::processEvents (this=0xbf9fcf74, flags=...) at kernel/qeventloop.cpp:149
#78 0x059d8522 in QEventLoop::exec (this=0xbf9fcf74, flags=...) at kernel/qeventloop.cpp:201
#79 0x059dcecc in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1008
#80 0x03fa68e7 in QApplication::exec () at kernel/qapplication.cpp:3736
#81 0x004a95b2 in kdemain (argc=1, argv=0xbf9fd2b4) at ../../kwin/main.cpp:542
#82 0x080485bb in main (argc=1, argv=0xbf9fd2b4) at kwin_dummy.cpp:3

This bug may be a duplicate of or related to bug 252817.

Possible duplicates by query: bug 271905, bug 271873, bug 271574, bug 271452, bug 271396.

Reported using DrKonqi