Application: kwin (4.6.00 (4.6.0) "release 6")
KDE Platform Version: 4.6.00 (4.6.0) "release 6"
Qt Version: 4.7.1
Operating System: Linux 2.6.37.1-1.2-desktop i686
Distribution: "openSUSE 11.4 (i586)"

-- Information about the crash:
- What I was doing when the application crashed:
Firefox 4.0 was the only open application running on the desktop when the screen-saver automatically activated. On closing the screen-saver KWin reported that it had crashed. On this occasion it was possible to close the warning without further problems. Previous occasions - the desktop froze completely and the session had to be forced to close (AltCtrlBackspace).

-- Backtrace:
Application: KWin (kwin), signal: Segmentation fault
[Current thread is 1 (Thread 0xb24b4ac0 (LWP 3533))]

Thread 2 (Thread 0xae307b70 (LWP 3759)):
#0  0xffffe424 in __kernel_vsyscall ()
#1  0xb6201105 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#2  0xb755daec in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libc.so.6
#3  0xb6bf4e17 in QTWTF::TCMalloc_PageHeap::scavengerThread (this=0xb6d0b1a0) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:2359
#4  0xb6bf4e5f in QTWTF::TCMalloc_PageHeap::runScavengerThread (context=0xb6d0b1a0) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:1464
#5  0xb61fcb05 in start_thread () from /lib/libpthread.so.0
#6  0xb754fd5e in clone () from /lib/libc.so.6

Thread 1 (Thread 0xb24b4ac0 (LWP 3533)):
[KCrash Handler]
#7  intel_region_buffer (intel=0x82b6f80, region=0x0, flag=2) at intel_regions.c:514
#8  0xaf59f16a in intelClearWithBlit (ctx=0x82b6f80, mask=2) at intel_blit.c:262
#9  0xaf5a190d in intelClear (ctx=0x82b6f80, mask=2) at intel_clear.c:177
#10 0xaf79f698 in _mesa_Clear (mask=<value optimized out>) at main/clear.c:241
#11 0xb76baebb in KWin::SceneOpenGL::paintBackground (this=0x87f06c0, region=...) at /usr/src/debug/kdebase-workspace-4.6.0/kwin/scene_opengl.cpp:921
#12 0xb76b132c in KWin::Scene::paintGenericScreen (this=0x87f06c0, orig_mask=32) at /usr/src/debug/kdebase-workspace-4.6.0/kwin/scene.cpp:188
#13 0xb76bb0d1 in KWin::SceneOpenGL::paintGenericScreen (this=0x87f06c0, mask=32, data=...) at /usr/src/debug/kdebase-workspace-4.6.0/kwin/scene_opengl.cpp:909
#14 0xb76ae110 in KWin::Scene::finalPaintScreen (this=0x87f06c0, mask=32, region=..., data=...) at /usr/src/debug/kdebase-workspace-4.6.0/kwin/scene.cpp:178
#15 0xb76cfc45 in KWin::EffectsHandlerImpl::paintScreen (this=0x856e690, mask=32, region=..., data=...) at /usr/src/debug/kdebase-workspace-4.6.0/kwin/effects.cpp:173
#16 0xae3a1796 in KWin::StartupFeedbackEffect::paintScreen (this=0x876d4e8, mask=32, region=..., data=...) at /usr/src/debug/kdebase-workspace-4.6.0/kwin/effects/startupfeedback/startupfeedback.cpp:166
#17 0xb76cfcc7 in KWin::EffectsHandlerImpl::paintScreen (this=0x856e690, mask=32, region=..., data=...) at /usr/src/debug/kdebase-workspace-4.6.0/kwin/effects.cpp:169
#18 0xb69dfd7a in KWin::Effect::paintScreen (this=0x862ec28, mask=32, region=..., data=...) at /usr/src/debug/kdebase-workspace-4.6.0/kwin/lib/kwineffects.cpp:227
#19 0xb76cfcc7 in KWin::EffectsHandlerImpl::paintScreen (this=0x856e690, mask=32, region=..., data=...) at /usr/src/debug/kdebase-workspace-4.6.0/kwin/effects.cpp:169
#20 0xae33fcb2 in KWin::LogoutEffect::paintScreen (this=0x86149a0, mask=32, region=..., data=...) at /usr/src/debug/kdebase-workspace-4.6.0/kwin/effects/logout/logout.cpp:207
#21 0xb76cfcc7 in KWin::EffectsHandlerImpl::paintScreen (this=0x856e690, mask=32, region=..., data=...) at /usr/src/debug/kdebase-workspace-4.6.0/kwin/effects.cpp:169
#22 0xae35c81f in KWin::ShadowEffect::paintScreen (this=0x87241f0, mask=32, region=..., data=...) at /usr/src/debug/kdebase-workspace-4.6.0/kwin/effects/shadow/shadow.cpp:189
#23 0xb76cfcc7 in KWin::EffectsHandlerImpl::paintScreen (this=0x856e690, mask=32, region=..., data=...) at /usr/src/debug/kdebase-workspace-4.6.0/kwin/effects.cpp:169
#24 0xae3718d1 in KWin::BlurEffect::paintScreen (this=0x85f1718, mask=32, region=..., data=...) at /usr/src/debug/kdebase-workspace-4.6.0/kwin/effects/blur/blur.cpp:230
#25 0xb76cfcc7 in KWin::EffectsHandlerImpl::paintScreen (this=0x856e690, mask=0, region=..., data=...) at /usr/src/debug/kdebase-workspace-4.6.0/kwin/effects.cpp:169
#26 0xae344da4 in KWin::PresentWindowsEffect::paintScreen (this=0x871d368, mask=0, region=..., data=...) at /usr/src/debug/kdebase-workspace-4.6.0/kwin/effects/presentwindows/presentwindows.cpp:205
#27 0xb76cfcc7 in KWin::EffectsHandlerImpl::paintScreen (this=0x856e690, mask=0, region=..., data=...) at /usr/src/debug/kdebase-workspace-4.6.0/kwin/effects.cpp:169
#28 0xb69dfd7a in KWin::Effect::paintScreen (this=0x8195ba8, mask=0, region=..., data=...) at /usr/src/debug/kdebase-workspace-4.6.0/kwin/lib/kwineffects.cpp:227
#29 0xb76cfcc7 in KWin::EffectsHandlerImpl::paintScreen (this=0x856e690, mask=0, region=..., data=...) at /usr/src/debug/kdebase-workspace-4.6.0/kwin/effects.cpp:169
#30 0xb69dfd7a in KWin::Effect::paintScreen (this=0x84bb890, mask=0, region=..., data=...) at /usr/src/debug/kdebase-workspace-4.6.0/kwin/lib/kwineffects.cpp:227
#31 0xb76cfcc7 in KWin::EffectsHandlerImpl::paintScreen (this=0x856e690, mask=0, region=..., data=...) at /usr/src/debug/kdebase-workspace-4.6.0/kwin/effects.cpp:169
#32 0xb69dfd7a in KWin::Effect::paintScreen (this=0x87f5dd0, mask=0, region=..., data=...) at /usr/src/debug/kdebase-workspace-4.6.0/kwin/lib/kwineffects.cpp:227
#33 0xb76cfcc7 in KWin::EffectsHandlerImpl::paintScreen (this=0x856e690, mask=0, region=..., data=...) at /usr/src/debug/kdebase-workspace-4.6.0/kwin/effects.cpp:169
#34 0xb69dfd7a in KWin::Effect::paintScreen (this=0x84af508, mask=0, region=..., data=...) at /usr/src/debug/kdebase-workspace-4.6.0/kwin/lib/kwineffects.cpp:227
#35 0xb76cfcc7 in KWin::EffectsHandlerImpl::paintScreen (this=0x856e690, mask=0, region=..., data=...) at /usr/src/debug/kdebase-workspace-4.6.0/kwin/effects.cpp:169
#36 0xae329e64 in KWin::DesktopGridEffect::paintScreen (this=0x8631e90, mask=0, region=..., data=...) at /usr/src/debug/kdebase-workspace-4.6.0/kwin/effects/desktopgrid/desktopgrid.cpp:155
#37 0xb76cfcc7 in KWin::EffectsHandlerImpl::paintScreen (this=0x856e690, mask=0, region=..., data=...) at /usr/src/debug/kdebase-workspace-4.6.0/kwin/effects.cpp:169
#38 0xae363e3d in KWin::SlideEffect::paintScreen (this=0x852a2c8, mask=0, region=..., data=...) at /usr/src/debug/kdebase-workspace-4.6.0/kwin/effects/slide/slide.cpp:86
#39 0xb76cfcc7 in KWin::EffectsHandlerImpl::paintScreen (this=0x856e690, mask=0, region=..., data=...) at /usr/src/debug/kdebase-workspace-4.6.0/kwin/effects.cpp:169
#40 0xae321dec in KWin::BoxSwitchEffect::paintScreen (this=0x872e8a0, mask=0, region=..., data=...) at /usr/src/debug/kdebase-workspace-4.6.0/kwin/effects/boxswitch/boxswitch.cpp:143
#41 0xb76cfcc7 in KWin::EffectsHandlerImpl::paintScreen (this=0x856e690, mask=0, region=..., data=...) at /usr/src/debug/kdebase-workspace-4.6.0/kwin/effects.cpp:169
#42 0xb69dfd7a in KWin::Effect::paintScreen (this=0x84c14d8, mask=0, region=..., data=...) at /usr/src/debug/kdebase-workspace-4.6.0/kwin/lib/kwineffects.cpp:227
#43 0xb76cfcc7 in KWin::EffectsHandlerImpl::paintScreen (this=0x856e690, mask=0, region=..., data=...) at /usr/src/debug/kdebase-workspace-4.6.0/kwin/effects.cpp:169
#44 0xb69dfd7a in KWin::Effect::paintScreen (this=0x87ca020, mask=0, region=..., data=...) at /usr/src/debug/kdebase-workspace-4.6.0/kwin/lib/kwineffects.cpp:227
#45 0xb76cfcc7 in KWin::EffectsHandlerImpl::paintScreen (this=0x856e690, mask=0, region=..., data=...) at /usr/src/debug/kdebase-workspace-4.6.0/kwin/effects.cpp:169
#46 0xb69dfd7a in KWin::Effect::paintScreen (this=0x86f7860, mask=0, region=..., data=...) at /usr/src/debug/kdebase-workspace-4.6.0/kwin/lib/kwineffects.cpp:227
#47 0xb76cfcc7 in KWin::EffectsHandlerImpl::paintScreen (this=0x856e690, mask=0, region=..., data=...) at /usr/src/debug/kdebase-workspace-4.6.0/kwin/effects.cpp:169
#48 0xb69dfd7a in KWin::Effect::paintScreen (this=0x870f920, mask=0, region=..., data=...) at /usr/src/debug/kdebase-workspace-4.6.0/kwin/lib/kwineffects.cpp:227
#49 0xb76cfcc7 in KWin::EffectsHandlerImpl::paintScreen (this=0x856e690, mask=0, region=..., data=...) at /usr/src/debug/kdebase-workspace-4.6.0/kwin/effects.cpp:169
#50 0xb69dfd7a in KWin::Effect::paintScreen (this=0x8607ef8, mask=0, region=..., data=...) at /usr/src/debug/kdebase-workspace-4.6.0/kwin/lib/kwineffects.cpp:227
#51 0xb76cfcc7 in KWin::EffectsHandlerImpl::paintScreen (this=0x856e690, mask=0, region=..., data=...) at /usr/src/debug/kdebase-workspace-4.6.0/kwin/effects.cpp:169
#52 0xae36e760 in KWin::ZoomEffect::paintScreen (this=0x84bbc60, mask=0, region=..., data=...) at /usr/src/debug/kdebase-workspace-4.6.0/kwin/effects/zoom/zoom.cpp:341
#53 0xb76cfcc7 in KWin::EffectsHandlerImpl::paintScreen (this=0x856e690, mask=0, region=..., data=...) at /usr/src/debug/kdebase-workspace-4.6.0/kwin/effects.cpp:169
#54 0xb76b0a09 in KWin::Scene::paintScreen (this=0x87f06c0, mask=0xbff06130, region=0xbff061d0) at /usr/src/debug/kdebase-workspace-4.6.0/kwin/scene.cpp:137
#55 0xb76c617a in KWin::SceneOpenGL::paint (this=0x87f06c0, damage=..., toplevels=...) at /usr/src/debug/kdebase-workspace-4.6.0/kwin/scene_opengl.cpp:772
#56 0xb76ab213 in KWin::Workspace::performCompositing (this=0x8460770) at /usr/src/debug/kdebase-workspace-4.6.0/kwin/composite.cpp:448
#57 0xb63893f4 in QObject::event (this=0x8460770, e=0xbff0671c) at kernel/qobject.cpp:1175
#58 0xb5881414 in QApplicationPrivate::notify_helper (this=0x8070028, receiver=0x8460770, e=0xbff0671c) at kernel/qapplication.cpp:4445
#59 0xb588a0c7 in QApplication::notify (this=0xbff06a54, receiver=0x8460770, e=0xbff0671c) at kernel/qapplication.cpp:3845
#60 0xb71961f1 in KApplication::notify (this=0xbff06a54, receiver=0x8460770, event=0xbff0671c) at /usr/src/debug/kdelibs-4.6.0/kdeui/kernel/kapplication.cpp:311
#61 0xb7637131 in KWin::Application::notify (this=0xbff06a54, o=0x8460770, e=0xbff0671c) at /usr/src/debug/kdebase-workspace-4.6.0/kwin/main.cpp:376
#62 0xb6373fde in QCoreApplication::notifyInternal (this=0xbff06a54, receiver=0x8460770, event=0xbff0671c) at kernel/qcoreapplication.cpp:732
#63 0xb63a5379 in sendEvent (this=0x80707b0) at kernel/qcoreapplication.h:215
#64 QTimerInfoList::activateTimers (this=0x80707b0) at kernel/qeventdispatcher_unix.cpp:618
#65 0xb63a5b1d in QEventDispatcherUNIX::processEvents (this=0x80534e0, flags=...) at kernel/qeventdispatcher_unix.cpp:937
#66 0xb593864a in QEventDispatcherX11::processEvents (this=0x80534e0, flags=...) at kernel/qeventdispatcher_x11.cpp:152
#67 0xb63732bd in QEventLoop::processEvents (this=0xbff06984, flags=...) at kernel/qeventloop.cpp:149
#68 0xb63734e9 in QEventLoop::exec (this=0xbff06984, flags=...) at kernel/qeventloop.cpp:201
#69 0xb6377f90 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1009
#70 0xb587f104 in QApplication::exec () at kernel/qapplication.cpp:3719
#71 0xb7639bc7 in kdemain (argc=3, argv=0xbff06cc4) at /usr/src/debug/kdebase-workspace-4.6.0/kwin/main.cpp:542
#72 0x0804860b in main (argc=3, argv=0xbff06cc4) at /usr/src/debug/kdebase-workspace-4.6.0/build/kwin/kwin_dummy.cpp:3

This bug may be a duplicate of or related to bug 269889, bug 257115, bug 252824.

Possible duplicates by query: bug 271452, bug 271396, bug 270557, bug 269938, bug 269895.

Reported using DrKonqi