Application: kwin (4.6.2 (4.6.2))
KDE Platform Version: 4.6.2 (4.6.2) (Compiled from sources)
Qt Version: 4.7.2
Operating System: Linux 2.6.38-8-generic x86_64
Distribution: Ubuntu 11.04

-- Information about the crash:
- What I was doing when the application crashed:
I was looking a flash video in full screen mode and I changed my sound set by the shortcut (an indicator appears and Kwin crashs)
At the same manner when a friend disconnect by skype and skype gives this information (the small window appears) Kwin crashs)

- Custom settings of the application:
I had window composition activated

The crash can be reproduced every time.

-- Backtrace:
Application: KWin (kwin), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f9bfc2637a0 (LWP 1012))]

Thread 3 (Thread 0x7f9be0bf5700 (LWP 1036)):
#0  0xffffffffff60017b in ?? ()
#1  0x00007f9be0bf4ad0 in ?? ()
#2  0x00007fff4c5787b2 in ?? ()
Backtrace stopped: previous frame identical to this frame (corrupt stack?)

Thread 2 (Thread 0x7f9bdbfff700 (LWP 1037)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f9bfa9102a2 in QTWTF::TCMalloc_PageHeap::scavengerThread (this=0x7f9bfac29180) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:2359
#2  0x00007f9bfa9102d9 in QTWTF::TCMalloc_PageHeap::runScavengerThread (context=0x7f9bfac37254) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:1464
#3  0x00007f9bf246bd8c in start_thread (arg=0x7f9bdbfff700) at pthread_create.c:304
#4  0x00007f9bfbab104d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#5  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f9bfc2637a0 (LWP 1012)):
[KCrash Handler]
#6  intel_region_buffer (intel=0xb85e20, region=0x0, flag=2) at intel_regions.c:514
#7  0x00007f9be39546c2 in intelClearWithBlit (ctx=0xb85e20, mask=2) at intel_blit.c:262
#8  0x00007f9be3956d2a in intelClear (ctx=0xb85e20, mask=2) at intel_clear.c:177
#9  0x00007f9bfbe27ce7 in KWin::SceneOpenGL::paintBackground (this=<value optimized out>, region=<value optimized out>) at ../../kwin/scene_opengl.cpp:921
#10 0x00007f9bfbe1f88f in KWin::Scene::paintGenericScreen (this=0xb831f0, orig_mask=40) at ../../kwin/scene.cpp:188
#11 0x00007f9bfbe1cc7a in KWin::Scene::finalPaintScreen (this=0xb831f0, mask=40, region=<value optimized out>, data=<value optimized out>) at ../../kwin/scene.cpp:178
#12 0x00007f9bfbe3af19 in KWin::EffectsHandlerImpl::paintScreen (this=0xeab0a0, mask=40, region=<value optimized out>, data=...) at ../../kwin/effects.cpp:173
#13 0x00007f9be29d05a6 in KWin::StartupFeedbackEffect::paintScreen (this=0x204b000, mask=40, region=<value optimized out>, data=...) at ../../../kwin/effects/startupfeedback/startupfeedback.cpp:166
#14 0x00007f9bfbe3afa3 in KWin::EffectsHandlerImpl::paintScreen (this=0xeab0a0, mask=40, region=<value optimized out>, data=...) at ../../kwin/effects.cpp:169
#15 0x00007f9bf9efaa18 in KWin::Effect::paintScreen (this=<value optimized out>, mask=40, region=<value optimized out>, data=...) at ../../../kwin/lib/kwineffects.cpp:227
#16 0x00007f9bfbe3afa3 in KWin::EffectsHandlerImpl::paintScreen (this=0xeab0a0, mask=40, region=<value optimized out>, data=...) at ../../kwin/effects.cpp:169
#17 0x00007f9be297744d in KWin::LogoutEffect::paintScreen (this=0x20caa40, mask=40, region=..., data=...) at ../../../kwin/effects/logout/logout.cpp:207
#18 0x00007f9bfbe3afa3 in KWin::EffectsHandlerImpl::paintScreen (this=0xeab0a0, mask=40, region=<value optimized out>, data=...) at ../../kwin/effects.cpp:169
#19 0x00007f9be299257b in KWin::ShadowEffect::paintScreen (this=0x1dc3a30, mask=40, region=..., data=...) at ../../../kwin/effects/shadow/shadow.cpp:189
#20 0x00007f9bfbe3afa3 in KWin::EffectsHandlerImpl::paintScreen (this=0xeab0a0, mask=40, region=<value optimized out>, data=...) at ../../kwin/effects.cpp:169
#21 0x00007f9be29a4e68 in KWin::BlurEffect::paintScreen (this=<value optimized out>, mask=40, region=..., data=...) at ../../../kwin/effects/blur/blur.cpp:230
#22 0x00007f9bfbe3afa3 in KWin::EffectsHandlerImpl::paintScreen (this=0xeab0a0, mask=8, region=<value optimized out>, data=...) at ../../kwin/effects.cpp:169
#23 0x00007f9be297bfbd in KWin::PresentWindowsEffect::paintScreen (this=0x20d9dd0, mask=8, region=..., data=...) at ../../../kwin/effects/presentwindows/presentwindows.cpp:205
#24 0x00007f9bfbe3afa3 in KWin::EffectsHandlerImpl::paintScreen (this=0xeab0a0, mask=8, region=<value optimized out>, data=...) at ../../kwin/effects.cpp:169
#25 0x00007f9bf9efaa18 in KWin::Effect::paintScreen (this=<value optimized out>, mask=8, region=<value optimized out>, data=...) at ../../../kwin/lib/kwineffects.cpp:227
#26 0x00007f9bfbe3afa3 in KWin::EffectsHandlerImpl::paintScreen (this=0xeab0a0, mask=8, region=<value optimized out>, data=...) at ../../kwin/effects.cpp:169
#27 0x00007f9bf9efaa18 in KWin::Effect::paintScreen (this=<value optimized out>, mask=8, region=<value optimized out>, data=...) at ../../../kwin/lib/kwineffects.cpp:227
#28 0x00007f9bfbe3afa3 in KWin::EffectsHandlerImpl::paintScreen (this=0xeab0a0, mask=8, region=<value optimized out>, data=...) at ../../kwin/effects.cpp:169
#29 0x00007f9bf9efaa18 in KWin::Effect::paintScreen (this=<value optimized out>, mask=8, region=<value optimized out>, data=...) at ../../../kwin/lib/kwineffects.cpp:227
#30 0x00007f9bfbe3afa3 in KWin::EffectsHandlerImpl::paintScreen (this=0xeab0a0, mask=8, region=<value optimized out>, data=...) at ../../kwin/effects.cpp:169
#31 0x00007f9bf9efaa18 in KWin::Effect::paintScreen (this=<value optimized out>, mask=8, region=<value optimized out>, data=...) at ../../../kwin/lib/kwineffects.cpp:227
#32 0x00007f9bfbe3afa3 in KWin::EffectsHandlerImpl::paintScreen (this=0xeab0a0, mask=8, region=<value optimized out>, data=...) at ../../kwin/effects.cpp:169
#33 0x00007f9be2963365 in KWin::DesktopGridEffect::paintScreen (this=0x1cf6840, mask=8, region=..., data=...) at ../../../kwin/effects/desktopgrid/desktopgrid.cpp:155
#34 0x00007f9bfbe3afa3 in KWin::EffectsHandlerImpl::paintScreen (this=0xeab0a0, mask=8, region=<value optimized out>, data=...) at ../../kwin/effects.cpp:169
#35 0x00007f9be2998b8f in KWin::SlideEffect::paintScreen (this=<value optimized out>, mask=8, region=..., data=...) at ../../../kwin/effects/slide/slide.cpp:86
#36 0x00007f9bfbe3afa3 in KWin::EffectsHandlerImpl::paintScreen (this=0xeab0a0, mask=8, region=<value optimized out>, data=...) at ../../kwin/effects.cpp:169
#37 0x00007f9be295cbad in KWin::BoxSwitchEffect::paintScreen (this=0x20cb460, mask=8, region=..., data=...) at ../../../kwin/effects/boxswitch/boxswitch.cpp:143
#38 0x00007f9bfbe3afa3 in KWin::EffectsHandlerImpl::paintScreen (this=0xeab0a0, mask=8, region=<value optimized out>, data=...) at ../../kwin/effects.cpp:169
#39 0x00007f9be29b3256 in KWin::CubeEffect::paintScreen (this=<value optimized out>, mask=8, region=..., data=...) at ../../../kwin/effects/cube/cube.cpp:698
#40 0x00007f9bfbe3afa3 in KWin::EffectsHandlerImpl::paintScreen (this=0xeab0a0, mask=8, region=<value optimized out>, data=...) at ../../kwin/effects.cpp:169
#41 0x00007f9bf9efaa18 in KWin::Effect::paintScreen (this=<value optimized out>, mask=8, region=<value optimized out>, data=...) at ../../../kwin/lib/kwineffects.cpp:227
#42 0x00007f9bfbe3afa3 in KWin::EffectsHandlerImpl::paintScreen (this=0xeab0a0, mask=8, region=<value optimized out>, data=...) at ../../kwin/effects.cpp:169
#43 0x00007f9bf9efaa18 in KWin::Effect::paintScreen (this=<value optimized out>, mask=8, region=<value optimized out>, data=...) at ../../../kwin/lib/kwineffects.cpp:227
#44 0x00007f9bfbe3afa3 in KWin::EffectsHandlerImpl::paintScreen (this=0xeab0a0, mask=8, region=<value optimized out>, data=...) at ../../kwin/effects.cpp:169
#45 0x00007f9bf9efaa18 in KWin::Effect::paintScreen (this=<value optimized out>, mask=8, region=<value optimized out>, data=...) at ../../../kwin/lib/kwineffects.cpp:227
#46 0x00007f9bfbe3afa3 in KWin::EffectsHandlerImpl::paintScreen (this=0xeab0a0, mask=8, region=<value optimized out>, data=...) at ../../kwin/effects.cpp:169
#47 0x00007f9be29abd86 in KWin::CoverSwitchEffect::paintScreen (this=0x20d4f40, mask=8, region=..., data=...) at ../../../kwin/effects/coverswitch/coverswitch.cpp:126
#48 0x00007f9bfbe3afa3 in KWin::EffectsHandlerImpl::paintScreen (this=0xeab0a0, mask=8, region=<value optimized out>, data=...) at ../../kwin/effects.cpp:169
#49 0x00007f9bf9efaa18 in KWin::Effect::paintScreen (this=<value optimized out>, mask=8, region=<value optimized out>, data=...) at ../../../kwin/lib/kwineffects.cpp:227
#50 0x00007f9bfbe3afa3 in KWin::EffectsHandlerImpl::paintScreen (this=0xeab0a0, mask=8, region=<value optimized out>, data=...) at ../../kwin/effects.cpp:169
#51 0x00007f9bf9efaa18 in KWin::Effect::paintScreen (this=<value optimized out>, mask=8, region=<value optimized out>, data=...) at ../../../kwin/lib/kwineffects.cpp:227
#52 0x00007f9bfbe3afa3 in KWin::EffectsHandlerImpl::paintScreen (this=0xeab0a0, mask=8, region=<value optimized out>, data=...) at ../../kwin/effects.cpp:169
#53 0x00007f9be29a239b in KWin::ZoomEffect::paintScreen (this=0x1e52a00, mask=8, region=..., data=...) at ../../../kwin/effects/zoom/zoom.cpp:341
#54 0x00007f9bfbe3afa3 in KWin::EffectsHandlerImpl::paintScreen (this=0xeab0a0, mask=8, region=<value optimized out>, data=...) at ../../kwin/effects.cpp:169
#55 0x00007f9bfbe1f0af in KWin::Scene::paintScreen (this=0xb831f0, mask=0x7fff4c46ed1c, region=0x7fff4c46ede0) at ../../kwin/scene.cpp:137
#56 0x00007f9bfbe32ef3 in KWin::SceneOpenGL::paint (this=0xb831f0, damage=..., toplevels=<value optimized out>) at ../../kwin/scene_opengl.cpp:772
#57 0x00007f9bfbe1a396 in KWin::Workspace::performCompositing (this=0xeb1e90) at ../../kwin/composite.cpp:448
#58 0x00007f9bf7e731c9 in QObject::event (this=0xeb1e90, e=<value optimized out>) at kernel/qobject.cpp:1190
#59 0x00007f9bf72209e4 in QApplicationPrivate::notify_helper (this=0xaa52e0, receiver=0xeb1e90, e=0x7fff4c46f570) at kernel/qapplication.cpp:4462
#60 0x00007f9bf72253aa in QApplication::notify (this=<value optimized out>, receiver=0xeb1e90, e=0x7fff4c46f570) at kernel/qapplication.cpp:4341
#61 0x00007f9bfb5ac866 in KApplication::notify (this=0x7fff4c46f970, receiver=0xeb1e90, event=0x7fff4c46f570) at ../../kdeui/kernel/kapplication.cpp:311
#62 0x00007f9bf7e5f49c in QCoreApplication::notifyInternal (this=0x7fff4c46f970, receiver=0xeb1e90, event=0x7fff4c46f570) at kernel/qcoreapplication.cpp:731
#63 0x00007f9bf7e8cf12 in sendEvent (this=0xaa6600) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#64 QTimerInfoList::activateTimers (this=0xaa6600) at kernel/qeventdispatcher_unix.cpp:604
#65 0x00007f9bf7e8d05b in QEventDispatcherUNIX::processEvents (this=0xa4a340, flags=...) at kernel/qeventdispatcher_unix.cpp:923
#66 0x00007f9bf72c8c0c in QEventDispatcherX11::processEvents (this=0xa4a340, flags=...) at kernel/qeventdispatcher_x11.cpp:152
#67 0x00007f9bf7e5e882 in QEventLoop::processEvents (this=<value optimized out>, flags=...) at kernel/qeventloop.cpp:149
#68 0x00007f9bf7e5eabc in QEventLoop::exec (this=0x7fff4c46f8b0, flags=...) at kernel/qeventloop.cpp:201
#69 0x00007f9bf7e62ecb in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1008
#70 0x00007f9bfbdb81ec in kdemain (argc=<value optimized out>, argv=0x7fff4c470008) at ../../kwin/main.cpp:542
#71 0x00007f9bfb9e9eff in __libc_start_main (main=0x400740 <main(int, char**)>, argc=1, ubp_av=0x7fff4c470008, init=<value optimized out>, fini=<value optimized out>, rtld_fini=<value optimized out>, stack_end=0x7fff4c46fff8) at libc-start.c:226
#72 0x0000000000400669 in _start ()

Possible duplicates by query: bug 272011, bug 271964, bug 271905, bug 271873, bug 271574.

Reported using DrKonqi