Application that crashed: kwin Version of the application: 4.3.2 (KDE 4.3.2) KDE Version: 4.3.2 (KDE 4.3.2) Qt Version: 4.5.2 Operating System: Linux 2.6.31-20-generic i686 Distribution: Ubuntu 9.10 What I was doing when the application crashed: KWin crashed upon window switching using Alt+Tab and composting enabled. -- Backtrace: Application: KWin (kwin), signal: Segmentation fault [KCrash Handler] #6 WindowPaintData (this=0xbf802270, w=0x1) at ../../../kwin/lib/kwineffects.cpp:76 #7 0x02e5e917 in KWin::CoverSwitchEffect::paintFrontWindow (this=0x9a317d8, frontWindow=0x1, width=1024, leftWindows=2, rightWindows=2, reflectedWindow=false) at ../../../kwin/effects/coverswitch/coverswitch.cpp:801 #8 0x02e5fc28 in KWin::CoverSwitchEffect::paintScene (this=0x9a317d8, frontWindow=0x1, leftWindows=..., rightWindows=..., reflectedWindows=false) at ../../../kwin/effects/coverswitch/coverswitch.cpp:436 #9 0x02e661f3 in KWin::CoverSwitchEffect::paintScreen (this=0x9a317d8, mask=32, region=..., data=...) at ../../../kwin/effects/coverswitch/coverswitch.cpp:308 #10 0x00d99a90 in KWin::EffectsHandlerImpl::paintScreen (this=0x99ad420, mask=32, region=..., data=...) at ../../kwin/effects.cpp:122 #11 0x00138c66 in KWin::Effect::paintScreen (this=0x9a78558, mask=32, region=..., data=...) at ../../../kwin/lib/kwineffects.cpp:206 #12 0x00d99a90 in KWin::EffectsHandlerImpl::paintScreen (this=0x99ad420, mask=32, region=..., data=...) at ../../kwin/effects.cpp:122 #13 0x00138c66 in KWin::Effect::paintScreen (this=0x9a964a8, mask=32, region=..., data=...) at ../../../kwin/lib/kwineffects.cpp:206 #14 0x00d99a90 in KWin::EffectsHandlerImpl::paintScreen (this=0x99ad420, mask=32, region=..., data=...) at ../../kwin/effects.cpp:122 #15 0x02e5cdd3 in KWin::ZoomEffect::paintScreen (this=0x9a8a4c0, mask=32, region=..., data=...) at ../../../kwin/effects/zoom/zoom.cpp:73 #16 0x00d99a90 in KWin::EffectsHandlerImpl::paintScreen (this=0x99ad420, mask=32, region=..., data=...) at ../../kwin/effects.cpp:122 #17 0x00d82604 in KWin::Scene::paintScreen (this=0x99b18f0, mask=0xbf802858, region=0xbf802918) at ../../kwin/scene.cpp:134 #18 0x00d92213 in KWin::SceneOpenGL::paint (this=0x99b18f0, damage=..., toplevels=...) at ../../kwin/scene_opengl.cpp:746 #19 0x00d7dcd1 in KWin::Workspace::performCompositing (this=0x99aa1f0) at ../../kwin/composite.cpp:420 #20 0x00d0c79a in KWin::Workspace::qt_metacall (this=0x99aa1f0, _c=QMetaObject::InvokeMetaMethod, _id=153, _a=0xbf802a0c) at ./workspace.moc:473 #21 0x09786263 in QMetaObject::activate (sender=0x99aa454, from_signal_index=4, to_signal_index=4, argv=0x0) at kernel/qobject.cpp:3113 #22 0x09786ec2 in QMetaObject::activate (sender=0x99aa454, m=0x9861904, local_signal_index=0, argv=0x0) at kernel/qobject.cpp:3187 #23 0x097c0667 in QTimer::timeout (this=0x99aa454) at .moc/release-shared/moc_qtimer.cpp:128 #24 0x0978b9ae in QTimer::timerEvent (this=0x99aa454, e=0xbf802ec0) at kernel/qtimer.cpp:261 #25 0x097803bf in QObject::event (this=0x99aa454, e=0xbf802ec0) at kernel/qobject.cpp:1075 #26 0x08dadf54 in QApplicationPrivate::notify_helper (this=0x98eab50, receiver=0x99aa454, e=0xbf802ec0) at kernel/qapplication.cpp:4056 #27 0x08db567c in QApplication::notify (this=0xbf803238, receiver=0x99aa454, e=0xbf802ec0) at kernel/qapplication.cpp:3603 #28 0x00597bfa in KApplication::notify (this=0xbf803238, receiver=0x99aa454, event=0xbf802ec0) at ../../kdeui/kernel/kapplication.cpp:302 #29 0x00d2246f in KWin::Application::notify (this=0xbf803238, o=0x99aa454, e=0xbf802ec0) at ../../kwin/main.cpp:366 #30 0x097706cb in QCoreApplication::notifyInternal (this=0xbf803238, receiver=0x99aa454, event=0xbf802ec0) at kernel/qcoreapplication.cpp:610 #31 0x0979d7ce in QCoreApplication::sendEvent (this=0x98edd34) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213 #32 QTimerInfoList::activateTimers (this=0x98edd34) at kernel/qeventdispatcher_unix.cpp:572 #33 0x0979b0e0 in timerSourceDispatch (source=0x98edd00) at kernel/qeventdispatcher_glib.cpp:165 #34 0x07da2e88 in g_main_context_dispatch () from /lib/libglib-2.0.so.0 #35 0x07da6730 in ?? () from /lib/libglib-2.0.so.0 #36 0x07da6863 in g_main_context_iteration () from /lib/libglib-2.0.so.0 #37 0x0979b02c in QEventDispatcherGlib::processEvents (this=0x98d4b68, flags=...) at kernel/qeventdispatcher_glib.cpp:327 #38 0x08e4ebe5 in QGuiEventDispatcherGlib::processEvents (this=0x98d4b68, flags=...) at kernel/qguieventdispatcher_glib.cpp:202 #39 0x0976ec79 in QEventLoop::processEvents (this=0xbf803184, flags=) at kernel/qeventloop.cpp:149 #40 0x0976f0ca in QEventLoop::exec (this=0xbf803184, flags=...) at kernel/qeventloop.cpp:201 #41 0x0977153f in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888 #42 0x08daddd7 in QApplication::exec () at kernel/qapplication.cpp:3525 #43 0x00d25034 in kdemain (argc=3, argv=0xbf803434) at ../../kwin/main.cpp:522 #44 0x080485cb in main (argc=3, argv=0xbf803434) at kwin_dummy.cpp:3 Reported using DrKonqi
That bug should be fixed in a more recent release. If you are able to reproduce with KDE SC 4.4 please paste a new stacktrace and reopen the bug. Thanks