Application: plasma-desktop (0.4)
KDE Platform Version: 4.7.2 (4.7.2)
Qt Version: 4.7.4
Operating System: Linux 3.0.0-13-generic x86_64
Distribution: Ubuntu 11.10

-- Information about the crash:
- What I was doing when the application crashed: I just wanted to restart the computer. It sometimes also happens randomly, but very often when  I try to restart or shutdown the computer

The crash can be reproduced some of the time.

-- Backtrace:
Application: Plasma-Desktop-Umgebung (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0x7fbf267dd7a0 (LWP 2015))]

Thread 11 (Thread 0x7fbf0357a700 (LWP 2016)):
#0  0x00007fbf260c3773 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007fbf1a64ef68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fbf1a64f429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fbf232b5f3e in QEventDispatcherGlib::processEvents (this=0x123ebc0, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007fbf23289cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007fbf23289ef7 in QEventLoop::exec (this=0x7fbf03579db0, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007fbf231a127f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#7  0x00007fbf2326ccbf in QInotifyFileSystemWatcherEngine::run (this=0x123d550) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007fbf231a3d05 in QThreadPrivate::start (arg=0x123d550) at thread/qthread_unix.cpp:331
#9  0x00007fbf1b15befc in start_thread (arg=0x7fbf0357a700) at pthread_create.c:304
#10 0x00007fbf260cf89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 10 (Thread 0x7fbf00bc6700 (LWP 2033)):
#0  0x00007fbf260c3773 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007fbf1a64ef68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fbf1a64f429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fbf232b5f3e in QEventDispatcherGlib::processEvents (this=0x13efd30, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007fbf23289cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007fbf23289ef7 in QEventLoop::exec (this=0x7fbf00bc5db0, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007fbf231a127f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#7  0x00007fbf2326ccbf in QInotifyFileSystemWatcherEngine::run (this=0x13ef000) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007fbf231a3d05 in QThreadPrivate::start (arg=0x13ef000) at thread/qthread_unix.cpp:331
#9  0x00007fbf1b15befc in start_thread (arg=0x7fbf00bc6700) at pthread_create.c:304
#10 0x00007fbf260cf89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 9 (Thread 0x7fbef8de3700 (LWP 8844)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007fbf231a41ab in wait (time=18446744073709551615, this=0x12f9ee0) at thread/qwaitcondition_unix.cpp:88
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x1295810, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:160
#3  0x00007fbf1ef9e864 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x13261f0, th=0x25ab790) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007fbf1efa0e0b in ThreadWeaver::WorkingHardState::applyForWork (this=0x128a060, th=0x25ab790) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007fbf1efa0e24 in ThreadWeaver::WorkingHardState::applyForWork (this=0x128a060, th=0x25ab790) at ../../../threadweaver/Weaver/WorkingHardState.cpp:74
#6  0x00007fbf1efa0e24 in ThreadWeaver::WorkingHardState::applyForWork (this=0x128a060, th=0x25ab790) at ../../../threadweaver/Weaver/WorkingHardState.cpp:74
#7  0x00007fbf1ef9fccf in ThreadWeaver::ThreadRunHelper::run (this=0x7fbef8de2e00, parent=0x13261f0, th=0x25ab790) at ../../../threadweaver/Weaver/Thread.cpp:87
#8  0x00007fbf1ef9fd5b in ThreadWeaver::Thread::run (this=0x25ab790) at ../../../threadweaver/Weaver/Thread.cpp:142
#9  0x00007fbf231a3d05 in QThreadPrivate::start (arg=0x25ab790) at thread/qthread_unix.cpp:331
#10 0x00007fbf1b15befc in start_thread (arg=0x7fbef8de3700) at pthread_create.c:304
#11 0x00007fbf260cf89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#12 0x0000000000000000 in ?? ()

Thread 8 (Thread 0x7fbef648e700 (LWP 8845)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007fbf231a41ab in wait (time=18446744073709551615, this=0x12f9ee0) at thread/qwaitcondition_unix.cpp:88
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x1295810, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:160
#3  0x00007fbf1ef9e864 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x13261f0, th=0x1764400) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007fbf1efa0e0b in ThreadWeaver::WorkingHardState::applyForWork (this=0x128a060, th=0x1764400) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007fbf1ef9fccf in ThreadWeaver::ThreadRunHelper::run (this=0x7fbef648de00, parent=0x13261f0, th=0x1764400) at ../../../threadweaver/Weaver/Thread.cpp:87
#6  0x00007fbf1ef9fd5b in ThreadWeaver::Thread::run (this=0x1764400) at ../../../threadweaver/Weaver/Thread.cpp:142
#7  0x00007fbf231a3d05 in QThreadPrivate::start (arg=0x1764400) at thread/qthread_unix.cpp:331
#8  0x00007fbf1b15befc in start_thread (arg=0x7fbef648e700) at pthread_create.c:304
#9  0x00007fbf260cf89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#10 0x0000000000000000 in ?? ()

Thread 7 (Thread 0x7fbef5c8d700 (LWP 8846)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007fbf231a41ab in wait (time=18446744073709551615, this=0x12f9ee0) at thread/qwaitcondition_unix.cpp:88
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x1295810, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:160
#3  0x00007fbf1ef9e864 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x13261f0, th=0x7fbefc0039c0) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007fbf1efa0e0b in ThreadWeaver::WorkingHardState::applyForWork (this=0x128a060, th=0x7fbefc0039c0) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007fbf1efa0e24 in ThreadWeaver::WorkingHardState::applyForWork (this=0x128a060, th=0x7fbefc0039c0) at ../../../threadweaver/Weaver/WorkingHardState.cpp:74
#6  0x00007fbf1ef9fccf in ThreadWeaver::ThreadRunHelper::run (this=0x7fbef5c8ce00, parent=0x13261f0, th=0x7fbefc0039c0) at ../../../threadweaver/Weaver/Thread.cpp:87
#7  0x00007fbf1ef9fd5b in ThreadWeaver::Thread::run (this=0x7fbefc0039c0) at ../../../threadweaver/Weaver/Thread.cpp:142
#8  0x00007fbf231a3d05 in QThreadPrivate::start (arg=0x7fbefc0039c0) at thread/qthread_unix.cpp:331
#9  0x00007fbf1b15befc in start_thread (arg=0x7fbef5c8d700) at pthread_create.c:304
#10 0x00007fbf260cf89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 6 (Thread 0x7fbef548c700 (LWP 8847)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007fbf231a41ab in wait (time=18446744073709551615, this=0x12f9ee0) at thread/qwaitcondition_unix.cpp:88
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x1295810, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:160
#3  0x00007fbf1ef9e864 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x13261f0, th=0x7fbef0000f00) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007fbf1efa0e0b in ThreadWeaver::WorkingHardState::applyForWork (this=0x128a060, th=0x7fbef0000f00) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007fbf1ef9fccf in ThreadWeaver::ThreadRunHelper::run (this=0x7fbef548be00, parent=0x13261f0, th=0x7fbef0000f00) at ../../../threadweaver/Weaver/Thread.cpp:87
#6  0x00007fbf1ef9fd5b in ThreadWeaver::Thread::run (this=0x7fbef0000f00) at ../../../threadweaver/Weaver/Thread.cpp:142
#7  0x00007fbf231a3d05 in QThreadPrivate::start (arg=0x7fbef0000f00) at thread/qthread_unix.cpp:331
#8  0x00007fbf1b15befc in start_thread (arg=0x7fbef548c700) at pthread_create.c:304
#9  0x00007fbf260cf89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#10 0x0000000000000000 in ?? ()

Thread 5 (Thread 0x7fbef4c8b700 (LWP 8848)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007fbf231a41ab in wait (time=18446744073709551615, this=0x12f9ee0) at thread/qwaitcondition_unix.cpp:88
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x1295810, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:160
#3  0x00007fbf1ef9e864 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x13261f0, th=0x7fbef0001880) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007fbf1efa0e0b in ThreadWeaver::WorkingHardState::applyForWork (this=0x128a060, th=0x7fbef0001880) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007fbf1efa0e24 in ThreadWeaver::WorkingHardState::applyForWork (this=0x128a060, th=0x7fbef0001880) at ../../../threadweaver/Weaver/WorkingHardState.cpp:74
#6  0x00007fbf1efa0e24 in ThreadWeaver::WorkingHardState::applyForWork (this=0x128a060, th=0x7fbef0001880) at ../../../threadweaver/Weaver/WorkingHardState.cpp:74
#7  0x00007fbf1ef9fccf in ThreadWeaver::ThreadRunHelper::run (this=0x7fbef4c8ae00, parent=0x13261f0, th=0x7fbef0001880) at ../../../threadweaver/Weaver/Thread.cpp:87
#8  0x00007fbf1ef9fd5b in ThreadWeaver::Thread::run (this=0x7fbef0001880) at ../../../threadweaver/Weaver/Thread.cpp:142
#9  0x00007fbf231a3d05 in QThreadPrivate::start (arg=0x7fbef0001880) at thread/qthread_unix.cpp:331
#10 0x00007fbf1b15befc in start_thread (arg=0x7fbef4c8b700) at pthread_create.c:304
#11 0x00007fbf260cf89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#12 0x0000000000000000 in ?? ()

Thread 4 (Thread 0x7fbeeffff700 (LWP 8849)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007fbf231a41ab in wait (time=18446744073709551615, this=0x12f9ee0) at thread/qwaitcondition_unix.cpp:88
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x1295810, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:160
#3  0x00007fbf1ef9e864 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x13261f0, th=0x2bd7b20) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007fbf1efa0e0b in ThreadWeaver::WorkingHardState::applyForWork (this=0x128a060, th=0x2bd7b20) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007fbf1ef9fccf in ThreadWeaver::ThreadRunHelper::run (this=0x7fbeefffee00, parent=0x13261f0, th=0x2bd7b20) at ../../../threadweaver/Weaver/Thread.cpp:87
#6  0x00007fbf1ef9fd5b in ThreadWeaver::Thread::run (this=0x2bd7b20) at ../../../threadweaver/Weaver/Thread.cpp:142
#7  0x00007fbf231a3d05 in QThreadPrivate::start (arg=0x2bd7b20) at thread/qthread_unix.cpp:331
#8  0x00007fbf1b15befc in start_thread (arg=0x7fbeeffff700) at pthread_create.c:304
#9  0x00007fbf260cf89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#10 0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7fbeef7fe700 (LWP 8850)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007fbf231a41ab in wait (time=18446744073709551615, this=0x12f9ee0) at thread/qwaitcondition_unix.cpp:88
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x1295810, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:160
#3  0x00007fbf1ef9e864 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x13261f0, th=0x1d929a0) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007fbf1efa0e0b in ThreadWeaver::WorkingHardState::applyForWork (this=0x128a060, th=0x1d929a0) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007fbf1ef9fccf in ThreadWeaver::ThreadRunHelper::run (this=0x7fbeef7fde00, parent=0x13261f0, th=0x1d929a0) at ../../../threadweaver/Weaver/Thread.cpp:87
#6  0x00007fbf1ef9fd5b in ThreadWeaver::Thread::run (this=0x1d929a0) at ../../../threadweaver/Weaver/Thread.cpp:142
#7  0x00007fbf231a3d05 in QThreadPrivate::start (arg=0x1d929a0) at thread/qthread_unix.cpp:331
#8  0x00007fbf1b15befc in start_thread (arg=0x7fbeef7fe700) at pthread_create.c:304
#9  0x00007fbf260cf89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#10 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7fbeeeffd700 (LWP 8851)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007fbf231a41ab in wait (time=18446744073709551615, this=0x12f9ee0) at thread/qwaitcondition_unix.cpp:88
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x1295810, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:160
#3  0x00007fbf1ef9e864 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x13261f0, th=0x224c2f0) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007fbf1efa0e0b in ThreadWeaver::WorkingHardState::applyForWork (this=0x128a060, th=0x224c2f0) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007fbf1efa0e24 in ThreadWeaver::WorkingHardState::applyForWork (this=0x128a060, th=0x224c2f0) at ../../../threadweaver/Weaver/WorkingHardState.cpp:74
#6  0x00007fbf1efa0e24 in ThreadWeaver::WorkingHardState::applyForWork (this=0x128a060, th=0x224c2f0) at ../../../threadweaver/Weaver/WorkingHardState.cpp:74
#7  0x00007fbf1ef9fccf in ThreadWeaver::ThreadRunHelper::run (this=0x7fbeeeffce00, parent=0x13261f0, th=0x224c2f0) at ../../../threadweaver/Weaver/Thread.cpp:87
#8  0x00007fbf1ef9fd5b in ThreadWeaver::Thread::run (this=0x224c2f0) at ../../../threadweaver/Weaver/Thread.cpp:142
#9  0x00007fbf231a3d05 in QThreadPrivate::start (arg=0x224c2f0) at thread/qthread_unix.cpp:331
#10 0x00007fbf1b15befc in start_thread (arg=0x7fbeeeffd700) at pthread_create.c:304
#11 0x00007fbf260cf89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#12 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7fbf267dd7a0 (LWP 2015)):
[KCrash Handler]
#6  0x00007fbf230f5790 in vtable for QGraphicsLayoutItem () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#7  0x00007fbf0cb71b96 in TaskGroupItem::~TaskGroupItem (this=0x312b1f0, __in_chrg=<optimized out>) at ../../../../../plasma/desktop/applets/tasks/taskgroupitem.cpp:82
#8  0x00007fbf0cb71c49 in TaskGroupItem::~TaskGroupItem (this=0x312b1f0, __in_chrg=<optimized out>) at ../../../../../plasma/desktop/applets/tasks/taskgroupitem.cpp:83
#9  0x00007fbf232a1a88 in QObject::event (this=0x312b1f0, e=<optimized out>) at kernel/qobject.cpp:1200
#10 0x00007fbf22c5989b in QGraphicsWidget::event (this=0x312b1f0, event=0x2e02cf0) at graphicsview/qgraphicswidget.cpp:1455
#11 0x00007fbf2263b424 in notify_helper (e=0x2e02cf0, receiver=0x312b1f0, this=0x7fd060) at kernel/qapplication.cpp:4486
#12 QApplicationPrivate::notify_helper (this=0x7fd060, receiver=0x312b1f0, e=0x2e02cf0) at kernel/qapplication.cpp:4458
#13 0x00007fbf22640291 in QApplication::notify (this=0x7df670, receiver=0x312b1f0, e=0x2e02cf0) at kernel/qapplication.cpp:4365
#14 0x00007fbf23f39126 in KApplication::notify (this=0x7df670, receiver=0x312b1f0, event=0x2e02cf0) at ../../kdeui/kernel/kapplication.cpp:311
#15 0x00007fbf2328aafc in QCoreApplication::notifyInternal (this=0x7df670, receiver=0x312b1f0, event=0x2e02cf0) at kernel/qcoreapplication.cpp:787
#16 0x00007fbf2328e51f in sendEvent (event=0x2e02cf0, receiver=0x312b1f0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#17 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=52, data=0x77b430) at kernel/qcoreapplication.cpp:1428
#18 0x00007fbf2328e7c4 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1071
#19 0x00007fbf263ce1a3 in kdemain (argc=1, argv=0x7ffff75fd488) at ../../../../plasma/desktop/shell/main.cpp:120
#20 0x00007fbf2600f30d in __libc_start_main (main=0x400640 <main(int, char**)>, argc=1, ubp_av=0x7ffff75fd488, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffff75fd478) at libc-start.c:226
#21 0x0000000000400671 in _start ()

Possible duplicates by query: bug 288129, bug 287962, bug 287333, bug 287205, bug 286733.

Reported using DrKonqi