Application: kwin (4.6.1 (4.6.1))
KDE Platform Version: 4.6.1 (4.6.1)
Qt Version: 4.7.0
Operating System: Linux 2.6.35-28-generic x86_64
Distribution: Ubuntu 10.10

-- Information about the crash:
- What I was doing when the application crashed:

Letting the computer sit idle at the desktop with two applications (Firefox and Kopete) open.

- Unusual behavior I noticed:

The computer would start the screen saver (OpenGL Screen Savers -> Solar Winds (GL)) normally. However, after a few minutes, moving the mouse to disengage the screen saver would result in either the desktop coming back (after a significant delay) with a crash report for KWin, or the desktop would not come back at all (solid black screen with the cursor), requiring a hard restart to use the machine.

The situation was reproduced several times.

-- Backtrace:
Application: KWin (kwin), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f9f43a8f780 (LWP 2585))]

Thread 3 (Thread 0x7f9f284bc700 (LWP 2650)):
#0  0xffffffffff60017b in ?? ()
#1  0x00007f9f284bbad0 in ?? ()
#2  0x00007fffdb1d3852 in ?? ()
Backtrace stopped: previous frame identical to this frame (corrupt stack?)

Thread 2 (Thread 0x7f9f27cbb700 (LWP 2651)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f9f4210c334 in QTWTF::TCMalloc_PageHeap::scavengerThread (this=0x7f9f42417160) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:2359
#2  0x00007f9f4210c369 in QTWTF::TCMalloc_PageHeap::runScavengerThread (context=0x7f9f42425234) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:1464
#3  0x00007f9f39d3b971 in start_thread (arg=<value optimized out>) at pthread_create.c:304
#4  0x00007f9f432f192d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#5  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f9f43a8f780 (LWP 2585)):
[KCrash Handler]
#6  0x00007f9f2b121a33 in ?? () from /usr/lib/dri/i915_dri.so
#7  0x00007f9f2b212905 in ?? () from /usr/lib/dri/i915_dri.so
#8  0x00007f9f2b206afa in ?? () from /usr/lib/dri/i915_dri.so
#9  0x00007f9f2b132c98 in ?? () from /usr/lib/dri/i915_dri.so
#10 0x00007f9f2b2078fd in ?? () from /usr/lib/dri/i915_dri.so
#11 0x00007f9f2b207c96 in ?? () from /usr/lib/dri/i915_dri.so
#12 0x00007f9f2b2003df in ?? () from /usr/lib/dri/i915_dri.so
#13 0x00007f9f2b1fbdcc in ?? () from /usr/lib/dri/i915_dri.so
#14 0x00007f9f2b1fdac2 in ?? () from /usr/lib/dri/i915_dri.so
#15 0x00007f9f2b15453e in ?? () from /usr/lib/dri/i915_dri.so
#16 0x00007f9f416f1ac9 in KWin::PaintClipper::Iterator::~Iterator (this=0x7fffdb1abc50, __in_chrg=<value optimized out>) at ../../../kwin/lib/kwineffects.cpp:873
#17 0x00007f9f416fb288 in KWin::renderGLGeometry (region=<value optimized out>, count=4, vertices=<value optimized out>, texture=0x1a6b950, color=0x0, dim=2, stride=0) at ../../../kwin/lib/kwinglutils.cpp:188
#18 0x00007f9f43667f36 in KWin::SceneOpenGL::Window::paintDecoration (this=0x1a572d0, decoration=0x182af28, decorationType=KWin::SceneOpenGL::Window::DecorationTop, region=<value optimized out>, rect=<value optimized out>, data=..., quads=..., updateDeco=false) at ../../kwin/scene_opengl.cpp:1633
#19 0x00007f9f4366a09f in KWin::SceneOpenGL::Window::performPaint (this=0x1a572d0, mask=1, region=) at ../../kwin/scene_opengl.cpp:1545
#20 0x00007f9f43655e63 in KWin::Scene::finalDrawWindow (this=<value optimized out>, w=<value optimized out>, mask=1, region=<value optimized out>, data=<value optimized out>) at ../../kwin/scene.cpp:332
#21 0x00007f9f43674fe9 in KWin::EffectsHandlerImpl::drawWindow (this=<value optimized out>, w=0x1a01cc0, mask=1, region=<value optimized out>, data=<value optimized out>) at ../../kwin/effects.cpp:247
#22 0x00007f9f416f1c7c in KWin::Effect::drawWindow (this=<value optimized out>, w=0x1a01cc0, mask=1, region=<value optimized out>, data=<value optimized out>) at ../../../kwin/lib/kwineffects.cpp:262
#23 0x00007f9f43675088 in KWin::EffectsHandlerImpl::drawWindow (this=0x13754e0, w=0x1a01cc0, mask=1, region=<value optimized out>, data=<value optimized out>) at ../../kwin/effects.cpp:243
#24 0x00007f9f416f1c7c in KWin::Effect::drawWindow (this=<value optimized out>, w=0x1a01cc0, mask=1, region=<value optimized out>, data=<value optimized out>) at ../../../kwin/lib/kwineffects.cpp:262
#25 0x00007f9f43675088 in KWin::EffectsHandlerImpl::drawWindow (this=0x13754e0, w=0x1a01cc0, mask=1, region=<value optimized out>, data=<value optimized out>) at ../../kwin/effects.cpp:243
#26 0x00007f9f416f1c7c in KWin::Effect::drawWindow (this=<value optimized out>, w=0x1a01cc0, mask=1, region=<value optimized out>, data=<value optimized out>) at ../../../kwin/lib/kwineffects.cpp:262
#27 0x00007f9f43675088 in KWin::EffectsHandlerImpl::drawWindow (this=0x13754e0, w=0x1a01cc0, mask=1, region=<value optimized out>, data=<value optimized out>) at ../../kwin/effects.cpp:243
#28 0x00007f9f416f1c7c in KWin::Effect::drawWindow (this=<value optimized out>, w=0x1a01cc0, mask=1, region=<value optimized out>, data=<value optimized out>) at ../../../kwin/lib/kwineffects.cpp:262
#29 0x00007f9f43675088 in KWin::EffectsHandlerImpl::drawWindow (this=0x13754e0, w=0x1a01cc0, mask=1, region=<value optimized out>, data=<value optimized out>) at ../../kwin/effects.cpp:243
#30 0x00007f9f416f1c7c in KWin::Effect::drawWindow (this=<value optimized out>, w=0x1a01cc0, mask=1, region=<value optimized out>, data=<value optimized out>) at ../../../kwin/lib/kwineffects.cpp:262
#31 0x00007f9f43675088 in KWin::EffectsHandlerImpl::drawWindow (this=0x13754e0, w=0x1a01cc0, mask=1, region=<value optimized out>, data=<value optimized out>) at ../../kwin/effects.cpp:243
#32 0x00007f9f416f1c7c in KWin::Effect::drawWindow (this=<value optimized out>, w=0x1a01cc0, mask=1, region=<value optimized out>, data=<value optimized out>) at ../../../kwin/lib/kwineffects.cpp:262
#33 0x00007f9f43675088 in KWin::EffectsHandlerImpl::drawWindow (this=0x13754e0, w=0x1a01cc0, mask=1, region=<value optimized out>, data=<value optimized out>) at ../../kwin/effects.cpp:243
#34 0x00007f9f416f1c7c in KWin::Effect::drawWindow (this=<value optimized out>, w=0x1a01cc0, mask=1, region=<value optimized out>, data=<value optimized out>) at ../../../kwin/lib/kwineffects.cpp:262
#35 0x00007f9f43675088 in KWin::EffectsHandlerImpl::drawWindow (this=0x13754e0, w=0x1a01cc0, mask=1, region=<value optimized out>, data=<value optimized out>) at ../../kwin/effects.cpp:243
#36 0x00007f9f416f1c7c in KWin::Effect::drawWindow (this=<value optimized out>, w=0x1a01cc0, mask=1, region=<value optimized out>, data=<value optimized out>) at ../../../kwin/lib/kwineffects.cpp:262
#37 0x00007f9f43675088 in KWin::EffectsHandlerImpl::drawWindow (this=0x13754e0, w=0x1a01cc0, mask=1, region=<value optimized out>, data=<value optimized out>) at ../../kwin/effects.cpp:243
#38 0x00007f9f416f1c7c in KWin::Effect::drawWindow (this=<value optimized out>, w=0x1a01cc0, mask=1, region=<value optimized out>, data=<value optimized out>) at ../../../kwin/lib/kwineffects.cpp:262
#39 0x00007f9f43675088 in KWin::EffectsHandlerImpl::drawWindow (this=0x13754e0, w=0x1a01cc0, mask=1, region=<value optimized out>, data=<value optimized out>) at ../../kwin/effects.cpp:243
#40 0x00007f9f416f1c7c in KWin::Effect::drawWindow (this=<value optimized out>, w=0x1a01cc0, mask=1, region=<value optimized out>, data=<value optimized out>) at ../../../kwin/lib/kwineffects.cpp:262
#41 0x00007f9f43675088 in KWin::EffectsHandlerImpl::drawWindow (this=0x13754e0, w=0x1a01cc0, mask=1, region=<value optimized out>, data=<value optimized out>) at ../../kwin/effects.cpp:243
#42 0x00007f9f416f1c7c in KWin::Effect::drawWindow (this=<value optimized out>, w=0x1a01cc0, mask=1, region=<value optimized out>, data=<value optimized out>) at ../../../kwin/lib/kwineffects.cpp:262
#43 0x00007f9f43675088 in KWin::EffectsHandlerImpl::drawWindow (this=0x13754e0, w=0x1a01cc0, mask=1, region=<value optimized out>, data=<value optimized out>) at ../../kwin/effects.cpp:243
#44 0x00007f9f416f1c7c in KWin::Effect::drawWindow (this=<value optimized out>, w=0x1a01cc0, mask=1, region=<value optimized out>, data=<value optimized out>) at ../../../kwin/lib/kwineffects.cpp:262
#45 0x00007f9f43675088 in KWin::EffectsHandlerImpl::drawWindow (this=0x13754e0, w=0x1a01cc0, mask=1, region=<value optimized out>, data=<value optimized out>) at ../../kwin/effects.cpp:243
#46 0x00007f9f416f1c7c in KWin::Effect::drawWindow (this=<value optimized out>, w=0x1a01cc0, mask=1, region=<value optimized out>, data=<value optimized out>) at ../../../kwin/lib/kwineffects.cpp:262
#47 0x00007f9f43675088 in KWin::EffectsHandlerImpl::drawWindow (this=0x13754e0, w=0x1a01cc0, mask=1, region=<value optimized out>, data=<value optimized out>) at ../../kwin/effects.cpp:243
#48 0x00007f9f416f1c7c in KWin::Effect::drawWindow (this=<value optimized out>, w=0x1a01cc0, mask=1, region=<value optimized out>, data=<value optimized out>) at ../../../kwin/lib/kwineffects.cpp:262
#49 0x00007f9f43675088 in KWin::EffectsHandlerImpl::drawWindow (this=0x13754e0, w=0x1a01cc0, mask=1, region=<value optimized out>, data=<value optimized out>) at ../../kwin/effects.cpp:243
#50 0x00007f9f43654b0c in KWin::Scene::finalPaintWindow (this=<value optimized out>, w=0x1a01cc0, mask=1, region=<value optimized out>, data=<value optimized out>) at ../../kwin/scene.cpp:323
#51 0x00007f9f43675109 in KWin::EffectsHandlerImpl::paintWindow (this=<value optimized out>, w=0x1a01cc0, mask=1, region=<value optimized out>, data=<value optimized out>) at ../../kwin/effects.cpp:204
#52 0x00007f9f416f1d8c in KWin::Effect::paintWindow (this=<value optimized out>, w=0x1a01cc0, mask=1, region=<value optimized out>, data=<value optimized out>) at ../../../kwin/lib/kwineffects.cpp:242
#53 0x00007f9f436751a8 in KWin::EffectsHandlerImpl::paintWindow (this=0x13754e0, w=0x1a01cc0, mask=1, region=<value optimized out>, data=<value optimized out>) at ../../kwin/effects.cpp:200
#54 0x00007f9f2a5b88b1 in KWin::DashboardEffect::paintWindow (this=<value optimized out>, w=0x1a01cc0, mask=1, region=) at ../../../kwin/effects/dashboard/dashboard.cpp:100
#55 0x00007f9f436751a8 in KWin::EffectsHandlerImpl::paintWindow (this=0x13754e0, w=0x1a01cc0, mask=1, region=<value optimized out>, data=<value optimized out>) at ../../kwin/effects.cpp:200
#56 0x00007f9f2a5d3af5 in KWin::LogoutEffect::paintWindow (this=<value optimized out>, w=0x1a01cc0, mask=1, region=) at ../../../kwin/effects/logout/logout.cpp:198
#57 0x00007f9f436751a8 in KWin::EffectsHandlerImpl::paintWindow (this=0x13754e0, w=0x1a01cc0, mask=1, region=<value optimized out>, data=<value optimized out>) at ../../kwin/effects.cpp:200
#58 0x00007f9f2a6010d7 in KWin::TaskbarThumbnailEffect::paintWindow (this=0x15bc6b0, w=0x1a01cc0, mask=1, region=<value optimized out>, data=...) at ../../../kwin/effects/taskbarthumbnail/taskbarthumbnail.cpp:70
#59 0x00007f9f436751a8 in KWin::EffectsHandlerImpl::paintWindow (this=0x13754e0, w=0x1a01cc0, mask=1, region=<value optimized out>, data=<value optimized out>) at ../../kwin/effects.cpp:200
#60 0x00007f9f2a5d0ae4 in KWin::HighlightWindowEffect::paintWindow (this=<value optimized out>, w=0x1a01cc0, mask=1, region=) at ../../../kwin/effects/highlightwindow/highlightwindow.cpp:104
#61 0x00007f9f436751a8 in KWin::EffectsHandlerImpl::paintWindow (this=0x13754e0, w=0x1a01cc0, mask=1, region=<value optimized out>, data=<value optimized out>) at ../../kwin/effects.cpp:200
#62 0x00007f9f2a5c80fd in KWin::DialogParentEffect::paintWindow (this=<value optimized out>, w=0x1a01cc0, mask=1, region=) at ../../../kwin/effects/dialogparent/dialogparent.cpp:70
#63 0x00007f9f436751a8 in KWin::EffectsHandlerImpl::paintWindow (this=0x13754e0, w=0x1a01cc0, mask=1, region=<value optimized out>, data=<value optimized out>) at ../../kwin/effects.cpp:200
#64 0x00007f9f2a5cc192 in KWin::FadeEffect::paintWindow (this=<value optimized out>, w=0x1a01cc0, mask=<value optimized out>, region=<value optimized out>, data=...) at ../../../kwin/effects/fade/fade.cpp:160
#65 0x00007f9f436751a8 in KWin::EffectsHandlerImpl::paintWindow (this=0x13754e0, w=0x1a01cc0, mask=1, region=<value optimized out>, data=<value optimized out>) at ../../kwin/effects.cpp:200
#66 0x00007f9f2a615490 in KWin::CubeEffect::paintWindow (this=0x151ec60, w=0x1a01cc0, mask=1, region=<value optimized out>, data=...) at ../../../kwin/effects/cube/cube.cpp:1581
#67 0x00007f9f436751a8 in KWin::EffectsHandlerImpl::paintWindow (this=0x13754e0, w=0x1a01cc0, mask=1, region=<value optimized out>, data=<value optimized out>) at ../../kwin/effects.cpp:200
#68 0x00007f9f2a61e73e in KWin::CubeSlideEffect::paintWindow (this=<value optimized out>, w=0x1a01cc0, mask=1, region=) at ../../../kwin/effects/cube/cubeslide.cpp:412
#69 0x00007f9f436751a8 in KWin::EffectsHandlerImpl::paintWindow (this=0x13754e0, w=0x1a01cc0, mask=1, region=<value optimized out>, data=<value optimized out>) at ../../kwin/effects.cpp:200
#70 0x00007f9f2a5d748f in KWin::TranslucencyEffect::paintWindow (this=<value optimized out>, w=0x1a01cc0, mask=1, region=) at ../../../kwin/effects/translucency/translucency.cpp:180
#71 0x00007f9f436751a8 in KWin::EffectsHandlerImpl::paintWindow (this=0x13754e0, w=0x1a01cc0, mask=1, region=<value optimized out>, data=<value optimized out>) at ../../kwin/effects.cpp:200
#72 0x00007f9f2a5d8ddd in KWin::MinimizeAnimationEffect::paintWindow (this=<value optimized out>, w=0x1a01cc0, mask=1, region=) at ../../../kwin/effects/minimizeanimation/minimizeanimation.cpp:103
#73 0x00007f9f436751a8 in KWin::EffectsHandlerImpl::paintWindow (this=0x13754e0, w=0x1a01cc0, mask=1, region=<value optimized out>, data=<value optimized out>) at ../../kwin/effects.cpp:200
#74 0x00007f9f2a60d7bd in KWin::CoverSwitchEffect::paintWindow (this=<value optimized out>, w=0x1a01cc0, mask=1, region=) at ../../../kwin/effects/coverswitch/coverswitch.cpp:504
#75 0x00007f9f436751a8 in KWin::EffectsHandlerImpl::paintWindow (this=0x13754e0, w=0x1a01cc0, mask=1, region=<value optimized out>, data=<value optimized out>) at ../../kwin/effects.cpp:200
#76 0x00007f9f2a6006b2 in KWin::SlidingPopupsEffect::paintWindow (this=<value optimized out>, w=0x1a01cc0, mask=<value optimized out>, region=<value optimized out>, data=...) at ../../../kwin/effects/slidingpopups/slidingpopups.cpp:127
#77 0x00007f9f436751a8 in KWin::EffectsHandlerImpl::paintWindow (this=0x13754e0, w=0x1a01cc0, mask=1, region=<value optimized out>, data=<value optimized out>) at ../../kwin/effects.cpp:200
#78 0x00007f9f2a5d2823 in KWin::LoginEffect::paintWindow (this=<value optimized out>, w=0x1a01cc0, mask=1, region=<value optimized out>, data=<value optimized out>) at ../../../kwin/effects/login/login.cpp:69
#79 0x00007f9f436751a8 in KWin::EffectsHandlerImpl::paintWindow (this=0x13754e0, w=0x1a01cc0, mask=1, region=<value optimized out>, data=<value optimized out>) at ../../kwin/effects.cpp:200
#80 0x00007f9f436560ac in KWin::Scene::paintWindow (this=<value optimized out>, w=0x1a572d0, mask=1, region=) at ../../kwin/scene.cpp:317
#81 0x00007f9f43657e9a in KWin::Scene::paintSimpleScreen (this=0xc7ffe0, orig_mask=<value optimized out>, region=<value optimized out>) at ../../kwin/scene.cpp:288
#82 0x00007f9f43654b87 in KWin::Scene::finalPaintScreen (this=0xc7ffe0, mask=0, region=<value optimized out>, data=<value optimized out>) at ../../kwin/scene.cpp:180
#83 0x00007f9f43675226 in KWin::EffectsHandlerImpl::paintScreen (this=<value optimized out>, mask=0, region=) at ../../kwin/effects.cpp:173
#84 0x00007f9f2a637bdb in KWin::StartupFeedbackEffect::paintScreen (this=0xb48890, mask=0, region=<value optimized out>, data=...) at ../../../kwin/effects/startupfeedback/startupfeedback.cpp:166
#85 0x00007f9f436752be in KWin::EffectsHandlerImpl::paintScreen (this=0x13754e0, mask=0, region=) at ../../kwin/effects.cpp:169
#86 0x00007f9f416f1e0f in KWin::Effect::paintScreen (this=<value optimized out>, mask=0, region=<value optimized out>, data=...) at ../../../kwin/lib/kwineffects.cpp:227
#87 0x00007f9f436752be in KWin::EffectsHandlerImpl::paintScreen (this=0x13754e0, mask=0, region=) at ../../kwin/effects.cpp:169
#88 0x00007f9f2a5d3f1f in KWin::LogoutEffect::paintScreen (this=0x154a8a0, mask=0, region=<value optimized out>, data=...) at ../../../kwin/effects/logout/logout.cpp:207
#89 0x00007f9f436752be in KWin::EffectsHandlerImpl::paintScreen (this=0x13754e0, mask=0, region=) at ../../kwin/effects.cpp:169
#90 0x00007f9f416f1e0f in KWin::Effect::paintScreen (this=<value optimized out>, mask=0, region=<value optimized out>, data=...) at ../../../kwin/lib/kwineffects.cpp:227
#91 0x00007f9f436752be in KWin::EffectsHandlerImpl::paintScreen (this=0x13754e0, mask=0, region=) at ../../kwin/effects.cpp:169
#92 0x00007f9f416f1e0f in KWin::Effect::paintScreen (this=<value optimized out>, mask=0, region=<value optimized out>, data=...) at ../../../kwin/lib/kwineffects.cpp:227
#93 0x00007f9f436752be in KWin::EffectsHandlerImpl::paintScreen (this=0x13754e0, mask=0, region=) at ../../kwin/effects.cpp:169
#94 0x00007f9f416f1e0f in KWin::Effect::paintScreen (this=<value optimized out>, mask=0, region=<value optimized out>, data=...) at ../../../kwin/lib/kwineffects.cpp:227
#95 0x00007f9f436752be in KWin::EffectsHandlerImpl::paintScreen (this=0x13754e0, mask=0, region=) at ../../kwin/effects.cpp:169
#96 0x00007f9f416f1e0f in KWin::Effect::paintScreen (this=<value optimized out>, mask=0, region=<value optimized out>, data=...) at ../../../kwin/lib/kwineffects.cpp:227
#97 0x00007f9f436752be in KWin::EffectsHandlerImpl::paintScreen (this=0x13754e0, mask=0, region=) at ../../kwin/effects.cpp:169
#98 0x00007f9f2a6193aa in KWin::CubeEffect::paintScreen (this=<value optimized out>, mask=0, region=) at ../../../kwin/effects/cube/cube.cpp:698
#99 0x00007f9f436752be in KWin::EffectsHandlerImpl::paintScreen (this=0x13754e0, mask=0, region=) at ../../kwin/effects.cpp:169
#100 0x00007f9f2a61ffe2 in KWin::CubeSlideEffect::paintScreen (this=<value optimized out>, mask=0, region=) at ../../../kwin/effects/cube/cubeslide.cpp:111
#101 0x00007f9f436752be in KWin::EffectsHandlerImpl::paintScreen (this=0x13754e0, mask=0, region=) at ../../kwin/effects.cpp:169
#102 0x00007f9f416f1e0f in KWin::Effect::paintScreen (this=<value optimized out>, mask=0, region=<value optimized out>, data=...) at ../../../kwin/lib/kwineffects.cpp:227
#103 0x00007f9f436752be in KWin::EffectsHandlerImpl::paintScreen (this=0x13754e0, mask=0, region=) at ../../kwin/effects.cpp:169
#104 0x00007f9f416f1e0f in KWin::Effect::paintScreen (this=<value optimized out>, mask=0, region=<value optimized out>, data=...) at ../../../kwin/lib/kwineffects.cpp:227
#105 0x00007f9f436752be in KWin::EffectsHandlerImpl::paintScreen (this=0x13754e0, mask=0, region=) at ../../kwin/effects.cpp:169
#106 0x00007f9f2a60fb04 in KWin::CoverSwitchEffect::paintScreen (this=0x15557e0, mask=0, region=<value optimized out>, data=...) at ../../../kwin/effects/coverswitch/coverswitch.cpp:126
#107 0x00007f9f436752be in KWin::EffectsHandlerImpl::paintScreen (this=0x13754e0, mask=0, region=) at ../../kwin/effects.cpp:169
#108 0x00007f9f416f1e0f in KWin::Effect::paintScreen (this=<value optimized out>, mask=0, region=<value optimized out>, data=...) at ../../../kwin/lib/kwineffects.cpp:227
#109 0x00007f9f436752be in KWin::EffectsHandlerImpl::paintScreen (this=0x13754e0, mask=0, region=) at ../../kwin/effects.cpp:169
#110 0x00007f9f416f1e0f in KWin::Effect::paintScreen (this=<value optimized out>, mask=0, region=<value optimized out>, data=...) at ../../../kwin/lib/kwineffects.cpp:227
#111 0x00007f9f436752be in KWin::EffectsHandlerImpl::paintScreen (this=0x13754e0, mask=0, region=) at ../../kwin/effects.cpp:169
#112 0x00007f9f436562d5 in KWin::Scene::paintScreen (this=0xc7ffe0, mask=0x7fffdb1af7cc, region=0x7fffdb1af8b0) at ../../kwin/scene.cpp:137
#113 0x00007f9f4366aef0 in KWin::SceneOpenGL::paint (this=0xc7ffe0, damage=<value optimized out>, toplevels=) at ../../kwin/scene_opengl.cpp:772
#114 0x00007f9f436517cf in KWin::Workspace::performCompositing (this=<value optimized out>) at ../../kwin/composite.cpp:448
#115 0x00007f9f3f64d8f9 in QObject::event (this=0xcf2a40, e=0x2) at kernel/qobject.cpp:1183
#116 0x00007f9f3e9a2fdc in QApplicationPrivate::notify_helper (this=0xb5b910, receiver=0xcf2a40, e=0x7fffdb1b00a0) at kernel/qapplication.cpp:4396
#117 0x00007f9f3e9a8aed in QApplication::notify (this=0x7fffdb1b04d0, receiver=0xcf2a40, e=0x7fffdb1b00a0) at kernel/qapplication.cpp:4277
#118 0x00007f9f42dd62c6 in KApplication::notify (this=0x7fffdb1b04d0, receiver=0xcf2a40, event=0x7fffdb1b00a0) at ../../kdeui/kernel/kapplication.cpp:311
#119 0x00007f9f3f63bcdc in QCoreApplication::notifyInternal (this=0x7fffdb1b04d0, receiver=0xcf2a40, event=0x7fffdb1b00a0) at kernel/qcoreapplication.cpp:732
#120 0x00007f9f3f66b6f2 in sendEvent (this=0xb5c320) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#121 QTimerInfoList::activateTimers (this=0xb5c320) at kernel/qeventdispatcher_unix.cpp:602
#122 0x00007f9f3f66b82c in QEventDispatcherUNIX::processEvents (this=0xb35c20, flags=) at kernel/qeventdispatcher_unix.cpp:923
#123 0x00007f9f3ea56c2f in QEventDispatcherX11::processEvents (this=<value optimized out>, flags=) at kernel/qeventdispatcher_x11.cpp:152
#124 0x00007f9f3f63aa02 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149
#125 0x00007f9f3f63adec in QEventLoop::exec (this=0x7fffdb1b03d0, flags=) at kernel/qeventloop.cpp:201
#126 0x00007f9f3f63eebb in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1009
#127 0x00007f9f435eb643 in kdemain (argc=<value optimized out>, argv=<value optimized out>) at ../../kwin/main.cpp:542
#128 0x00007f9f43229d8e in __libc_start_main (main=<value optimized out>, argc=<value optimized out>, ubp_av=<value optimized out>, init=<value optimized out>, fini=<value optimized out>, rtld_fini=<value optimized out>, stack_end=0x7fffdb1b0b58) at libc-start.c:226
#129 0x0000000000400669 in _start ()

Possible duplicates by query: bug 268179, bug 265365, bug 265031, bug 264687, bug 262639.

Reported using DrKonqi