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:
Cuando se activa el protector de pantalla, al restaurarla (moviendo el mouse, tocando una tecla) "salta" el error de Kwin

The crash can be reproduced every time.

-- Backtrace:
Application: KWin (kwin), signal: Segmentation fault
[Current thread is 1 (Thread 0xb78ae720 (LWP 2633))]

Thread 3 (Thread 0xb2ca8b70 (LWP 2639)):
#0  0x00b2ad41 in clock_gettime (clock_id=1, tp=0xb2ca8120) at ../sysdeps/unix/clock_gettime.c:116
#1  0x03cf7dd8 in do_gettime () at tools/qelapsedtimer_unix.cpp:123
#2  qt_gettime () at tools/qelapsedtimer_unix.cpp:140
#3  0x03dc44f2 in updateCurrentTime (this=0x8d1fd50, tm=...) at kernel/qeventdispatcher_unix.cpp:339
#4  QTimerInfoList::timerWait (this=0x8d1fd50, tm=...) at kernel/qeventdispatcher_unix.cpp:442
#5  0x03dc63a3 in QEventDispatcherUNIX::processEvents (this=0x8d1edc0, flags=...) at kernel/qeventdispatcher_unix.cpp:906
#6  0x03d95289 in QEventLoop::processEvents (this=0xb2ca8280, flags=...) at kernel/qeventloop.cpp:149
#7  0x03d95522 in QEventLoop::exec (this=0xb2ca8280, flags=...) at kernel/qeventloop.cpp:201
#8  0x03c9f2a0 in QThread::exec (this=0x8c8c9c8) at thread/qthread.cpp:492
#9  0x03d76fdb in QInotifyFileSystemWatcherEngine::run (this=0x8c8c9c8) at io/qfilesystemwatcher_inotify.cpp:248
#10 0x03ca1da2 in QThreadPrivate::start (arg=0x8c8c9c8) at thread/qthread_unix.cpp:320
#11 0x00b0ae99 in start_thread (arg=0xb2ca8b70) at pthread_create.c:304
#12 0x0075873e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:130

Thread 2 (Thread 0xb249fb70 (LWP 2640)):
#0  0x00b76416 in __kernel_vsyscall ()
#1  0x00b0f48c in pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/i386/i686/../i486/pthread_cond_wait.S:169
#2  0x007663fd in __pthread_cond_wait (cond=0x11c12b0, mutex=0x11c1298) at forward.c:139
#3  0x010a8817 in QTWTF::TCMalloc_PageHeap::scavengerThread (this=0x11bc1c0) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:2359
#4  0x010a8851 in QTWTF::TCMalloc_PageHeap::runScavengerThread (context=0x11bc1c0) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:1464
#5  0x00b0ae99 in start_thread (arg=0xb249fb70) at pthread_create.c:304
#6  0x0075873e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:130

Thread 1 (Thread 0xb78ae720 (LWP 2633)):
[KCrash Handler]
#7  0x0475f2e0 in intel_region_buffer () from /usr/lib/dri/i965_dri.so
#8  0x04750ce2 in intelClearWithBlit () from /usr/lib/dri/i965_dri.so
#9  0x047534c0 in ?? () from /usr/lib/dri/i965_dri.so
#10 0x04dea512 in _mesa_Clear () from /usr/lib/dri/libdricore.so
#11 0x002d584b in KWin::SceneOpenGL::paintBackground (this=0x8667f90, region=...) at ../../kwin/scene_opengl.cpp:921
#12 0x002cc562 in KWin::Scene::paintGenericScreen (this=0x8667f90, orig_mask=32) at ../../kwin/scene.cpp:188
#13 0x002d5a31 in KWin::SceneOpenGL::paintGenericScreen (this=0x8667f90, mask=32, data=...) at ../../kwin/scene_opengl.cpp:909
#14 0x002c97c0 in KWin::Scene::finalPaintScreen (this=0x8667f90, mask=32, region=..., data=...) at ../../kwin/scene.cpp:178
#15 0x002eb0fc in KWin::EffectsHandlerImpl::paintScreen (this=0x8a005b0, mask=32, region=..., data=...) at ../../kwin/effects.cpp:173
#16 0x050359d5 in KWin::SnowEffect::paintScreen (this=0x8c86088, mask=32, region=..., data=...) at ../../../kwin/effects/snow/snow.cpp:120
#17 0x002eb172 in KWin::EffectsHandlerImpl::paintScreen (this=0x8a005b0, mask=32, region=..., data=...) at ../../kwin/effects.cpp:169
#18 0x050360e9 in KWin::StartupFeedbackEffect::paintScreen (this=0x8b37cf8, mask=32, region=..., data=...) at ../../../kwin/effects/startupfeedback/startupfeedback.cpp:166
#19 0x002eb172 in KWin::EffectsHandlerImpl::paintScreen (this=0x8a005b0, mask=32, region=..., data=...) at ../../kwin/effects.cpp:169
#20 0x00180256 in KWin::Effect::paintScreen (this=0x8c548d8, mask=32, region=..., data=...) at ../../../kwin/lib/kwineffects.cpp:227
#21 0x002eb172 in KWin::EffectsHandlerImpl::paintScreen (this=0x8a005b0, mask=32, region=..., data=...) at ../../kwin/effects.cpp:169
#22 0x04fd807f in KWin::LogoutEffect::paintScreen (this=0x8b24fc8, mask=32, region=..., data=...) at ../../../kwin/effects/logout/logout.cpp:207
#23 0x002eb172 in KWin::EffectsHandlerImpl::paintScreen (this=0x8a005b0, mask=32, region=..., data=...) at ../../kwin/effects.cpp:169
#24 0x04ff3b10 in KWin::ShadowEffect::paintScreen (this=0x8bcd210, mask=32, region=..., data=...) at ../../../kwin/effects/shadow/shadow.cpp:189
#25 0x002eb172 in KWin::EffectsHandlerImpl::paintScreen (this=0x8a005b0, mask=32, region=..., data=...) at ../../kwin/effects.cpp:169
#26 0x05008013 in KWin::BlurEffect::paintScreen (this=0x8a51bc8, mask=32, region=..., data=...) at ../../../kwin/effects/blur/blur.cpp:230
#27 0x002eb172 in KWin::EffectsHandlerImpl::paintScreen (this=0x8a005b0, mask=0, region=..., data=...) at ../../kwin/effects.cpp:169
#28 0x04fdce6f in KWin::PresentWindowsEffect::paintScreen (this=0x8a2ea10, mask=0, region=..., data=...) at ../../../kwin/effects/presentwindows/presentwindows.cpp:205
#29 0x002eb172 in KWin::EffectsHandlerImpl::paintScreen (this=0x8a005b0, mask=0, region=..., data=...) at ../../kwin/effects.cpp:169
#30 0x00180256 in KWin::Effect::paintScreen (this=0x8b2a2c0, mask=0, region=..., data=...) at ../../../kwin/lib/kwineffects.cpp:227
#31 0x002eb172 in KWin::EffectsHandlerImpl::paintScreen (this=0x8a005b0, mask=0, region=..., data=...) at ../../kwin/effects.cpp:169
#32 0x00180256 in KWin::Effect::paintScreen (this=0x8a87150, mask=0, region=..., data=...) at ../../../kwin/lib/kwineffects.cpp:227
#33 0x002eb172 in KWin::EffectsHandlerImpl::paintScreen (this=0x8a005b0, mask=0, region=..., data=...) at ../../kwin/effects.cpp:169
#34 0x00180256 in KWin::Effect::paintScreen (this=0x8b28290, mask=0, region=..., data=...) at ../../../kwin/lib/kwineffects.cpp:227
#35 0x002eb172 in KWin::EffectsHandlerImpl::paintScreen (this=0x8a005b0, mask=0, region=..., data=...) at ../../kwin/effects.cpp:169
#36 0x00180256 in KWin::Effect::paintScreen (this=0x8b12750, mask=0, region=..., data=...) at ../../../kwin/lib/kwineffects.cpp:227
#37 0x002eb172 in KWin::EffectsHandlerImpl::paintScreen (this=0x8a005b0, mask=0, region=..., data=...) at ../../kwin/effects.cpp:169
#38 0x04fc37e9 in KWin::DesktopGridEffect::paintScreen (this=0x8a30388, mask=0, region=..., data=...) at ../../../kwin/effects/desktopgrid/desktopgrid.cpp:155
#39 0x002eb172 in KWin::EffectsHandlerImpl::paintScreen (this=0x8a005b0, mask=0, region=..., data=...) at ../../kwin/effects.cpp:169
#40 0x04fbc799 in KWin::BoxSwitchEffect::paintScreen (this=0x8ba8ac0, mask=0, region=..., data=...) at ../../../kwin/effects/boxswitch/boxswitch.cpp:143
#41 0x002eb172 in KWin::EffectsHandlerImpl::paintScreen (this=0x8a005b0, mask=0, region=..., data=...) at ../../kwin/effects.cpp:169
#42 0x05016bcc in KWin::CubeEffect::paintScreen (this=0x8a54a78, mask=0, region=..., data=...) at ../../../kwin/effects/cube/cube.cpp:698
#43 0x002eb172 in KWin::EffectsHandlerImpl::paintScreen (this=0x8a005b0, mask=0, region=..., data=...) at ../../kwin/effects.cpp:169
#44 0x00180256 in KWin::Effect::paintScreen (this=0x8a982e8, mask=0, region=..., data=...) at ../../../kwin/lib/kwineffects.cpp:227
#45 0x002eb172 in KWin::EffectsHandlerImpl::paintScreen (this=0x8a005b0, mask=0, region=..., data=...) at ../../kwin/effects.cpp:169
#46 0x00180256 in KWin::Effect::paintScreen (this=0x8c0c518, mask=0, region=..., data=...) at ../../../kwin/lib/kwineffects.cpp:227
#47 0x002eb172 in KWin::EffectsHandlerImpl::paintScreen (this=0x8a005b0, mask=0, region=..., data=...) at ../../kwin/effects.cpp:169
#48 0x0501fdf0 in KWin::CubeSlideEffect::paintScreen (this=0x8c86280, mask=0, region=..., data=...) at ../../../kwin/effects/cube/cubeslide.cpp:111
#49 0x002eb172 in KWin::EffectsHandlerImpl::paintScreen (this=0x8a005b0, mask=0, region=..., data=...) at ../../kwin/effects.cpp:169
#50 0x00180256 in KWin::Effect::paintScreen (this=0x8b23618, mask=0, region=..., data=...) at ../../../kwin/lib/kwineffects.cpp:227
#51 0x002eb172 in KWin::EffectsHandlerImpl::paintScreen (this=0x8a005b0, mask=0, region=..., data=...) at ../../kwin/effects.cpp:169
#52 0x00180256 in KWin::Effect::paintScreen (this=0x8b7a0d8, mask=0, region=..., data=...) at ../../../kwin/lib/kwineffects.cpp:227
#53 0x002eb172 in KWin::EffectsHandlerImpl::paintScreen (this=0x8a005b0, mask=0, region=..., data=...) at ../../kwin/effects.cpp:169
#54 0x0500fa0c in KWin::CoverSwitchEffect::paintScreen (this=0x8c0d198, mask=0, region=..., data=...) at ../../../kwin/effects/coverswitch/coverswitch.cpp:126
#55 0x002eb172 in KWin::EffectsHandlerImpl::paintScreen (this=0x8a005b0, mask=0, region=..., data=...) at ../../kwin/effects.cpp:169
#56 0x00180256 in KWin::Effect::paintScreen (this=0x8a2fa30, mask=0, region=..., data=...) at ../../../kwin/lib/kwineffects.cpp:227
#57 0x002eb172 in KWin::EffectsHandlerImpl::paintScreen (this=0x8a005b0, mask=0, region=..., data=...) at ../../kwin/effects.cpp:169
#58 0x00180256 in KWin::Effect::paintScreen (this=0x8a443b0, mask=0, region=..., data=...) at ../../../kwin/lib/kwineffects.cpp:227
#59 0x002eb172 in KWin::EffectsHandlerImpl::paintScreen (this=0x8a005b0, mask=0, region=..., data=...) at ../../kwin/effects.cpp:169
#60 0x050050c1 in KWin::ZoomEffect::paintScreen (this=0x8a97898, mask=0, region=..., data=...) at ../../../kwin/effects/zoom/zoom.cpp:341
#61 0x002eb172 in KWin::EffectsHandlerImpl::paintScreen (this=0x8a005b0, mask=0, region=..., data=...) at ../../kwin/effects.cpp:169
#62 0x002ca98c in KWin::Scene::paintScreen (this=0x8667f90, mask=0xbfb67918, region=0xbfb679a0) at ../../kwin/scene.cpp:137
#63 0x002e1962 in KWin::SceneOpenGL::paint (this=0x8667f90, damage=..., toplevels=...) at ../../kwin/scene_opengl.cpp:772
#64 0x002c6886 in KWin::Workspace::performCompositing (this=0x8964e28) at ../../kwin/composite.cpp:448
#65 0x03dab214 in QObject::event (this=0x8964e28, e=0xbfb67ecc) at kernel/qobject.cpp:1190
#66 0x012efd24 in QApplicationPrivate::process_cmdline (this=0x8598438) at kernel/qapplication.cpp:573
#67 0x012f48ce in ?? () at ../../include/QtCore/../../src/corelib/global/qglobal.h:2248 from /usr/lib/libQtGui.so.4
#68 0x00d583ca in KApplication::notify (this=0xbfb681e4, receiver=0x8964e28, event=0xbfb67ecc) at ../../kdeui/kernel/kapplication.cpp:311
#69 0x00255abf in KWin::Application::notify (this=0xbfb681e4, o=0x8964e28, e=0xbfb67ecc) at ../../kwin/main.cpp:376
#70 0x03d960bb in QCoreApplication::notifyInternal (this=0xbfb681e4, receiver=0x8964e28, event=0xbfb67ecc) at kernel/qcoreapplication.cpp:731
#71 0x03dc61e4 in sendEvent (this=0x85a1568) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#72 QTimerInfoList::activateTimers (this=0x85a1568) at kernel/qeventdispatcher_unix.cpp:604
#73 0x03dc6338 in QEventDispatcherUNIX::processEvents (this=0x8556aa8, flags=...) at kernel/qeventdispatcher_unix.cpp:923
#74 0x013a47ea in ~QAbstractEventDispatcherPrivate (this=0x8556aa8, __in_chrg=<value optimized out>) at ../../include/QtCore/private/../../../src/corelib/kernel/qabstracteventdispatcher_p.h:64
#75 ~QEventDispatcherGlibPrivate (this=0x8556aa8, __in_chrg=<value optimized out>) at ../../include/QtCore/private/../../../src/corelib/kernel/qeventdispatcher_glib_p.h:104
#76 QGuiEventDispatcherGlibPrivate::~QGuiEventDispatcherGlibPrivate (this=0x8556aa8, __in_chrg=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:63
#77 0x03d95289 in QEventLoop::processEvents (this=0xbfb68124, flags=...) at kernel/qeventloop.cpp:149
#78 0x03d95522 in QEventLoop::exec (this=0xbfb68124, flags=...) at kernel/qeventloop.cpp:201
#79 0x03d99ecc in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1008
#80 0x012ed8e7 in operator+ (widget=0xbfb681c8, touchEvent=0x8592d88) at ../../include/QtCore/../../src/corelib/tools/qpoint.h:315
#81 QApplicationPrivate::updateTouchPointsForWidget (widget=0xbfb681c8, touchEvent=0x8592d88) at kernel/qapplication.cpp:5659
#82 0x002585b2 in kdemain (argc=3, argv=0xbfb68464) at ../../kwin/main.cpp:542
#83 0x080485bb in main (argc=3, argv=0xbfb68464) at kwin_dummy.cpp:3

This bug may be a duplicate of or related to bug 277203, bug 252824.

Possible duplicates by query: bug 277753, bug 277203, bug 276797, bug 276695, bug 276588.

Reported using DrKonqi