Application: plasma-desktop (0.4)
KDE Platform Version: 4.7.2 (4.7.2)
Qt Version: 4.7.4
Operating System: Linux 3.0.0-12-generic x86_64
Distribution: Ubuntu 11.10

-- Information about the crash:
- What I was doing when the application crashed:
When, logging into KDE, plasma desktop starts going crazy and I can't see my taskbar (plasma-desktop restarts) unless I alt-tab.

The crash can be reproduced every time.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f8d485877c0 (LWP 3658))]

Thread 3 (Thread 0x7f8d23f36700 (LWP 3663)):
#0  g_main_context_dispatch (context=0x14c4270) at /build/buildd/glib2.0-2.30.0/./glib/gmain.c:3015
#1  0x00007f8d3c412258 in g_main_context_iterate (context=0x14c4270, block=<optimized out>, dispatch=1, self=<optimized out>) at /build/buildd/glib2.0-2.30.0/./glib/gmain.c:3089
#2  0x00007f8d3c412429 in g_main_context_iteration (context=0x14c4270, may_block=1) at /build/buildd/glib2.0-2.30.0/./glib/gmain.c:3152
#3  0x00007f8d45078f3e in QEventDispatcherGlib::processEvents (this=0x17d2c50, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007f8d4504ccf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f8d4504cef7 in QEventLoop::exec (this=0x7f8d23f35cd0, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007f8d44f6427f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#7  0x00007f8d4502fcbf in QInotifyFileSystemWatcherEngine::run (this=0x15e7490) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007f8d44f66d05 in QThreadPrivate::start (arg=0x15e7490) at thread/qthread_unix.cpp:331
#9  0x00007f8d3972b56c in ?? () from /usr/lib/nvidia-current/libGL.so.1
#10 0x00007f8d3cf1eefc in start_thread (arg=0x7f8d23f36700) at pthread_create.c:304
#11 0x00007f8d47e9289d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#12 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f8d1a7ee700 (LWP 3926)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f8d4207dfe2 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#2  0x00007f8d4207e019 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#3  0x00007f8d3972b56c in ?? () from /usr/lib/nvidia-current/libGL.so.1
#4  0x00007f8d3cf1eefc in start_thread (arg=0x7f8d1a7ee700) at pthread_create.c:304
#5  0x00007f8d47e9289d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#6  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f8d485877c0 (LWP 3658)):
[KCrash Handler]
#6  QGraphicsLayoutItem::graphicsItem (this=0x0) at graphicsview/qgraphicslayoutitem.cpp:920
#7  0x00007f8d449df8f1 in QGraphicsLayoutItemPrivate::hasHeightForWidth (this=<optimized out>) at graphicsview/qgraphicslayoutitem.cpp:286
#8  0x00007f8d44a25591 in QGridLayoutItem::hasDynamicConstraint (this=<optimized out>) at graphicsview/qgridlayoutengine.cpp:576
#9  0x00007f8d44a266b2 in ensureDynamicConstraint (this=0x223a2a0) at graphicsview/qgridlayoutengine.cpp:1657
#10 QGridLayoutEngine::ensureDynamicConstraint (this=0x223a2a0) at graphicsview/qgridlayoutengine.cpp:1652
#11 0x00007f8d44a26769 in QGridLayoutEngine::hasDynamicConstraint (this=0x223a2a0) at graphicsview/qgridlayoutengine.cpp:1677
#12 0x00007f8d44a2aa98 in QGridLayoutEngine::sizeHint (this=0x223a2a0, styleInfo=..., which=Qt::MaximumSize, constraint=...) at graphicsview/qgridlayoutengine.cpp:1134
#13 0x00007f8d449b401a in QGraphicsGridLayout::sizeHint (this=<optimized out>, which=Qt::MaximumSize, constraint=...) at graphicsview/qgraphicsgridlayout.cpp:656
#14 0x00007f8d449debd9 in QGraphicsLayoutItemPrivate::effectiveSizeHints (this=0x223a190, constraint=...) at graphicsview/qgraphicslayoutitem.cpp:169
#15 0x00007f8d449df491 in effectiveSizeHint (constraint=<optimized out>, which=<optimized out>, this=<optimized out>) at graphicsview/qgraphicslayoutitem.cpp:818
#16 QGraphicsLayoutItem::effectiveSizeHint (this=<optimized out>, which=<optimized out>, constraint=<optimized out>) at graphicsview/qgraphicslayoutitem.cpp:810
#17 0x00007f8d44a1c231 in QGraphicsWidget::sizeHint (this=<optimized out>, which=<optimized out>, constraint=<optimized out>) at graphicsview/qgraphicswidget.cpp:743
#18 0x00007f8d449decaf in QGraphicsLayoutItemPrivate::effectiveSizeHints (this=0x223a0a0, constraint=...) at graphicsview/qgraphicslayoutitem.cpp:175
#19 0x00007f8d449df491 in effectiveSizeHint (constraint=<optimized out>, which=<optimized out>, this=<optimized out>) at graphicsview/qgraphicslayoutitem.cpp:818
#20 QGraphicsLayoutItem::effectiveSizeHint (this=<optimized out>, which=<optimized out>, constraint=<optimized out>) at graphicsview/qgraphicslayoutitem.cpp:810
#21 0x00007f8d2b753905 in SystemTray::TaskArea::adjustHiddentTasksWidget (this=0x2235fb0) at ../../../../../plasma/generic/applets/systemtray/ui/taskarea.cpp:452
#22 0x00007f8d2b7555d9 in SystemTray::TaskArea::addWidgetForTask (this=0x2235fb0, task=0x2269670) at ../../../../../plasma/generic/applets/systemtray/ui/taskarea.cpp:320
#23 0x00007f8d2b755926 in SystemTray::TaskArea::addTask (this=0x2235fb0, task=<optimized out>) at ../../../../../plasma/generic/applets/systemtray/ui/taskarea.cpp:196
#24 0x00007f8d2b756124 in SystemTray::TaskArea::qt_metacall (this=0x2235fb0, _c=QMetaObject::InvokeMetaMethod, _id=<optimized out>, _a=0x7fff239b9f50) at ./taskarea.moc:89
#25 0x00007f8d45060eba in QMetaObject::activate (sender=0x159fce0, m=<optimized out>, local_signal_index=<optimized out>, argv=0x7fff239b9f50) at kernel/qobject.cpp:3278
#26 0x00007f8d2b73887f in SystemTray::Manager::taskAdded (this=<optimized out>, _t1=0x2269670) at ./manager.moc:99
#27 0x00007f8d2b738a95 in SystemTray::Manager::addTask (this=0x159fce0, task=0x2269670) at ../../../../../plasma/generic/applets/systemtray/core/manager.cpp:87
#28 0x00007f8d2b738be4 in SystemTray::Manager::qt_metacall (this=0x159fce0, _c=QMetaObject::InvokeMetaMethod, _id=<optimized out>, _a=0x7fff239ba0c0) at ./manager.moc:86
#29 0x00007f8d45060eba in QMetaObject::activate (sender=0x17dfa10, m=<optimized out>, local_signal_index=<optimized out>, argv=0x7fff239ba0c0) at kernel/qobject.cpp:3278
#30 0x00007f8d2b73908f in SystemTray::Protocol::taskCreated (this=<optimized out>, _t1=0x2269670) at ./protocol.moc:91
#31 0x00007f8d2b740178 in SystemTray::PlasmoidProtocol::addApplet (this=0x17dfa10, appletName=..., id=<optimized out>, parent=0x21c5e80) at ../../../../../plasma/generic/applets/systemtray/protocols/plasmoid/plasmoidtaskprotocol.cpp:112
#32 0x00007f8d2b7386d6 in SystemTray::Manager::addApplet (this=<optimized out>, appletName=<optimized out>, parent=<optimized out>) at ../../../../../plasma/generic/applets/systemtray/core/manager.cpp:110
#33 0x00007f8d2b74aa30 in SystemTray::Applet::checkDefaultApplets (this=0x21c5e80) at ../../../../../plasma/generic/applets/systemtray/ui/applet.cpp:737
#34 0x00007f8d2b74ba4c in SystemTray::Applet::qt_metacall (this=0x21c5e80, _c=QMetaObject::InvokeMetaMethod, _id=<optimized out>, _a=0x2249d30) at ./applet.moc:91
#35 0x00007f8d45064a5e in QObject::event (this=0x21c5e80, e=<optimized out>) at kernel/qobject.cpp:1217
#36 0x00007f8d44a1c89b in QGraphicsWidget::event (this=0x21c5e80, event=0x226a470) at graphicsview/qgraphicswidget.cpp:1455
#37 0x00007f8d443fe424 in notify_helper (e=0x226a470, receiver=0x21c5e80, this=0x123d6e0) at kernel/qapplication.cpp:4486
#38 QApplicationPrivate::notify_helper (this=0x123d6e0, receiver=0x21c5e80, e=0x226a470) at kernel/qapplication.cpp:4458
#39 0x00007f8d44403291 in QApplication::notify (this=0x1231a30, receiver=0x21c5e80, e=0x226a470) at kernel/qapplication.cpp:4365
#40 0x00007f8d45cfc126 in KApplication::notify (this=0x1231a30, receiver=0x21c5e80, event=0x226a470) at ../../kdeui/kernel/kapplication.cpp:311
#41 0x00007f8d4504dafc in QCoreApplication::notifyInternal (this=0x1231a30, receiver=0x21c5e80, event=0x226a470) at kernel/qcoreapplication.cpp:787
#42 0x00007f8d4505151f in sendEvent (event=0x226a470, receiver=0x21c5e80) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#43 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x115c430) at kernel/qcoreapplication.cpp:1428
#44 0x00007f8d45078a73 in sendPostedEvents () at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:220
#45 postEventSourceDispatch (s=<optimized out>) at kernel/qeventdispatcher_glib.cpp:277
#46 0x00007f8d3c411a5d in g_main_dispatch (context=0x12408a0) at /build/buildd/glib2.0-2.30.0/./glib/gmain.c:2441
#47 g_main_context_dispatch (context=0x12408a0) at /build/buildd/glib2.0-2.30.0/./glib/gmain.c:3011
#48 0x00007f8d3c412258 in g_main_context_iterate (context=0x12408a0, block=<optimized out>, dispatch=1, self=<optimized out>) at /build/buildd/glib2.0-2.30.0/./glib/gmain.c:3089
#49 0x00007f8d3c412429 in g_main_context_iteration (context=0x12408a0, may_block=1) at /build/buildd/glib2.0-2.30.0/./glib/gmain.c:3152
#50 0x00007f8d45078ed6 in QEventDispatcherGlib::processEvents (this=0x115df40, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:422
#51 0x00007f8d444a607e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=<optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#52 0x00007f8d4504ccf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#53 0x00007f8d4504cef7 in QEventLoop::exec (this=0x7fff239bab20, flags=...) at kernel/qeventloop.cpp:201
#54 0x00007f8d45051789 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#55 0x00007f8d481911a3 in kdemain (argc=1, argv=0x7fff239baf08) at ../../../../plasma/desktop/shell/main.cpp:120
#56 0x00007f8d47dd230d in __libc_start_main (main=0x400640 <main(int, char**)>, argc=1, ubp_av=0x7fff239baf08, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff239baef8) at libc-start.c:226
#57 0x0000000000400671 in _start ()

Possible duplicates by query: bug 285361, bug 284758, bug 284253, bug 284115, bug 284112.

Reported using DrKonqi