Application: plasma-desktop (0.4)
KDE Platform Version: 4.7.3 (4.7.3)
Qt Version: 4.7.4
Operating System: Linux 3.0.0-14-generic x86_64
Distribution: Ubuntu 11.10

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

Closing the program and Dolphin Free Office

- Unusual behavior I noticed:

disappearance of the menu bar, the screen freeze + black screen for a few seconds and crashes Firefox display bug report wizard.

-- Backtrace:
Application: Outil de gestion de fenêtres Plasma (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f250c48f7c0 (LWP 2069))]

Thread 8 (Thread 0x7f24e83cf700 (LWP 2070)):
#0  0x00007f25002fe724 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f25002fef82 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f25002ff429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f2508f65f3e in QEventDispatcherGlib::processEvents (this=0x1fb83c0, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007f2508f39cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f2508f39ef7 in QEventLoop::exec (this=0x7f24e83cecd0, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007f2508e5127f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#7  0x00007f2508f1ccbf in QInotifyFileSystemWatcherEngine::run (this=0x1f9e300) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007f2508e53d05 in QThreadPrivate::start (arg=0x1f9e300) at thread/qthread_unix.cpp:331
#9  0x00007f24fd61856c in ?? () from /usr/lib/nvidia-current-updates/libGL.so.1
#10 0x00007f2500e0befc in start_thread (arg=0x7f24e83cf700) at pthread_create.c:304
#11 0x00007f250bd8089d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#12 0x0000000000000000 in ?? ()

Thread 7 (Thread 0x7f24e5b20700 (LWP 2071)):
#0  0xffffffffff60017b in ?? ()
#1  0x00007f24e5b1f9f0 in ?? ()
#2  0x00007fffe2fff7e7 in ?? ()
Backtrace stopped: previous frame identical to this frame (corrupt stack?)

Thread 6 (Thread 0x7f24de5fd700 (LWP 2077)):
#0  0x00007f25002fe102 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f25002fedfd in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f25002ff792 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f24df0db516 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#4  0x00007f25003242b6 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f24fd61856c in ?? () from /usr/lib/nvidia-current-updates/libGL.so.1
#6  0x00007f2500e0befc in start_thread (arg=0x7f24de5fd700) at pthread_create.c:304
#7  0x00007f250bd8089d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#8  0x0000000000000000 in ?? ()

Thread 5 (Thread 0x7f24db6bf700 (LWP 3869)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f2508e541ab in wait (time=18446744073709551615, this=0x2010210) at thread/qwaitcondition_unix.cpp:88
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x1ff6950, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:160
#3  0x00007f2504c4e864 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x206ae00, th=0x1840010) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007f2504c50e0b in ThreadWeaver::WorkingHardState::applyForWork (this=0x1fd29d0, th=0x1840010) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007f2504c4fccf in ThreadWeaver::ThreadRunHelper::run (this=0x7f24db6bed20, parent=0x206ae00, th=0x1840010) at ../../../threadweaver/Weaver/Thread.cpp:87
#6  0x00007f2504c4fd5b in ThreadWeaver::Thread::run (this=0x1840010) at ../../../threadweaver/Weaver/Thread.cpp:142
#7  0x00007f2508e53d05 in QThreadPrivate::start (arg=0x1840010) at thread/qthread_unix.cpp:331
#8  0x00007f24fd61856c in ?? () from /usr/lib/nvidia-current-updates/libGL.so.1
#9  0x00007f2500e0befc in start_thread (arg=0x7f24db6bf700) at pthread_create.c:304
#10 0x00007f250bd8089d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 4 (Thread 0x7f24e4a9b700 (LWP 3870)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f2508e541ab in wait (time=18446744073709551615, this=0x2010210) at thread/qwaitcondition_unix.cpp:88
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x1ff6950, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:160
#3  0x00007f2504c4e864 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x206ae00, th=0x7f24e0008ad0) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007f2504c50e0b in ThreadWeaver::WorkingHardState::applyForWork (this=0x1fd29d0, th=0x7f24e0008ad0) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007f2504c4fccf in ThreadWeaver::ThreadRunHelper::run (this=0x7f24e4a9ad20, parent=0x206ae00, th=0x7f24e0008ad0) at ../../../threadweaver/Weaver/Thread.cpp:87
#6  0x00007f2504c4fd5b in ThreadWeaver::Thread::run (this=0x7f24e0008ad0) at ../../../threadweaver/Weaver/Thread.cpp:142
#7  0x00007f2508e53d05 in QThreadPrivate::start (arg=0x7f24e0008ad0) at thread/qthread_unix.cpp:331
#8  0x00007f24fd61856c in ?? () from /usr/lib/nvidia-current-updates/libGL.so.1
#9  0x00007f2500e0befc in start_thread (arg=0x7f24e4a9b700) at pthread_create.c:304
#10 0x00007f250bd8089d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7f24dedfe700 (LWP 3871)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f2508e541ab in wait (time=18446744073709551615, this=0x2010210) at thread/qwaitcondition_unix.cpp:88
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x1ff6950, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:160
#3  0x00007f2504c4e864 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x206ae00, th=0x2bccf20) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007f2504c50e0b in ThreadWeaver::WorkingHardState::applyForWork (this=0x1fd29d0, th=0x2bccf20) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007f2504c4fccf in ThreadWeaver::ThreadRunHelper::run (this=0x7f24dedfdd20, parent=0x206ae00, th=0x2bccf20) at ../../../threadweaver/Weaver/Thread.cpp:87
#6  0x00007f2504c4fd5b in ThreadWeaver::Thread::run (this=0x2bccf20) at ../../../threadweaver/Weaver/Thread.cpp:142
#7  0x00007f2508e53d05 in QThreadPrivate::start (arg=0x2bccf20) at thread/qthread_unix.cpp:331
#8  0x00007f24fd61856c in ?? () from /usr/lib/nvidia-current-updates/libGL.so.1
#9  0x00007f2500e0befc in start_thread (arg=0x7f24dedfe700) at pthread_create.c:304
#10 0x00007f250bd8089d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f24d77e6700 (LWP 3872)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f2508e541ab in wait (time=18446744073709551615, this=0x2010210) at thread/qwaitcondition_unix.cpp:88
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x1ff6950, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:160
#3  0x00007f2504c4e864 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x206ae00, th=0x2024540) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007f2504c50e0b in ThreadWeaver::WorkingHardState::applyForWork (this=0x1fd29d0, th=0x2024540) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007f2504c4fccf in ThreadWeaver::ThreadRunHelper::run (this=0x7f24d77e5d20, parent=0x206ae00, th=0x2024540) at ../../../threadweaver/Weaver/Thread.cpp:87
#6  0x00007f2504c4fd5b in ThreadWeaver::Thread::run (this=0x2024540) at ../../../threadweaver/Weaver/Thread.cpp:142
#7  0x00007f2508e53d05 in QThreadPrivate::start (arg=0x2024540) at thread/qthread_unix.cpp:331
#8  0x00007f24fd61856c in ?? () from /usr/lib/nvidia-current-updates/libGL.so.1
#9  0x00007f2500e0befc in start_thread (arg=0x7f24d77e6700) at pthread_create.c:304
#10 0x00007f250bd8089d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f250c48f7c0 (LWP 2069)):
[KCrash Handler]
#6  operator== (value=0, this=0xe) at /usr/include/qt4/QtCore/qbasicatomic.h:70
#7  isNull (this=0x32dee00) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:568
#8  operator! (this=0x32dee00) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:574
#9  TaskManager::TaskItem::task (this=<optimized out>) at ../../../libs/taskmanager/taskitem.cpp:113
#10 0x00007f24f1065112 in WindowTaskItem::publishIconGeometry (this=0x242d1e0) at ../../../../../plasma/desktop/applets/tasks/windowtaskitem.cpp:120
#11 0x00007f24f1073b7c in AbstractTaskItem::timerEvent (this=0x242d1e0, event=<optimized out>) at ../../../../../plasma/desktop/applets/tasks/abstracttaskitem.cpp:439
#12 0x00007f2508f51789 in QObject::event (this=0x242d1e0, e=<optimized out>) at kernel/qobject.cpp:1181
#13 0x00007f250890989b in QGraphicsWidget::event (this=0x242d1e0, event=0x7fffe2f08070) at graphicsview/qgraphicswidget.cpp:1455
#14 0x00007f25082eb424 in notify_helper (e=0x7fffe2f08070, receiver=0x242d1e0, this=0x15b7a90) at kernel/qapplication.cpp:4486
#15 QApplicationPrivate::notify_helper (this=0x15b7a90, receiver=0x242d1e0, e=0x7fffe2f08070) at kernel/qapplication.cpp:4458
#16 0x00007f25082f0291 in QApplication::notify (this=0x15a53c0, receiver=0x242d1e0, e=0x7fffe2f08070) at kernel/qapplication.cpp:4365
#17 0x00007f2509be9126 in KApplication::notify (this=0x15a53c0, receiver=0x242d1e0, event=0x7fffe2f08070) at ../../kdeui/kernel/kapplication.cpp:311
#18 0x00007f2508f3aafc in QCoreApplication::notifyInternal (this=0x15a53c0, receiver=0x242d1e0, event=0x7fffe2f08070) at kernel/qcoreapplication.cpp:787
#19 0x00007f2508f67d62 in sendEvent (event=0x7fffe2f08070, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#20 QTimerInfoList::activateTimers (this=0x15b7200) at kernel/qeventdispatcher_unix.cpp:603
#21 0x00007f2508f65538 in timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:184
#22 idleTimerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:231
#23 0x00007f25002fea5d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007f25002ff258 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#25 0x00007f25002ff429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#26 0x00007f2508f65ed6 in QEventDispatcherGlib::processEvents (this=0x14f8f40, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:422
#27 0x00007f250839307e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=<optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#28 0x00007f2508f39cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#29 0x00007f2508f39ef7 in QEventLoop::exec (this=0x7fffe2f08300, flags=...) at kernel/qeventloop.cpp:201
#30 0x00007f2508f3e789 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#31 0x00007f250c07f1a3 in kdemain (argc=1, argv=0x7fffe2f086e8) at ../../../../plasma/desktop/shell/main.cpp:120
#32 0x00007f250bcc030d in __libc_start_main (main=0x400640 <main(int, char**)>, argc=1, ubp_av=0x7fffe2f086e8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffe2f086d8) at libc-start.c:226
#33 0x0000000000400671 in _start ()

Possible duplicates by query: bug 291974, bug 291918, bug 291911, bug 291905, bug 291893.

Reported using DrKonqi