Application: plasma-desktop (0.4)
KDE Platform Version: 4.7.3 (4.7.3)
Qt Version: 4.7.4
Operating System: Linux 3.0.0-13-generic i686
Distribution: Ubuntu 11.10

-- Information about the crash:
When dolphin is opened or switching applications plasma crashes, background becomes black, no bars or menus visibles and the only way to switch windows is ALT+TAB

The crash can be reproduced some of the time.

-- Backtrace:
Application: Shell de escritorio Plasma (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0xb76e4b20 (LWP 1800))]

Thread 4 (Thread 0xb04d8b70 (LWP 1801)):
#0  0x05cd6d10 in __GI_clock_gettime (clock_id=1, tp=0xb04d8018) at ../sysdeps/unix/clock_gettime.c:116
#1  0x07d5f7d5 in do_gettime (frac=0xb04d8010, sec=0xb04d8008) at tools/qelapsedtimer_unix.cpp:123
#2  qt_gettime () at tools/qelapsedtimer_unix.cpp:140
#3  0x07e324b6 in QTimerInfoList::updateCurrentTime (this=0xafb0117c) at kernel/qeventdispatcher_unix.cpp:339
#4  0x07e3280a in QTimerInfoList::timerWait (this=0xafb0117c, tm=...) at kernel/qeventdispatcher_unix.cpp:442
#5  0x07e31053 in timerSourcePrepareHelper (src=<optimized out>, timeout=0xb04d811c) at kernel/qeventdispatcher_glib.cpp:136
#6  0x07e310ed in timerSourcePrepare (source=0xafb01148, timeout=<optimized out>) at kernel/qeventdispatcher_glib.cpp:169
#7  0x041ea88c in g_main_context_prepare () from /lib/i386-linux-gnu/libglib-2.0.so.0
#8  0x041eb637 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#9  0x041ebc2a in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#10 0x07e31b37 in QEventDispatcherGlib::processEvents (this=0x92bbd30, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#11 0x07e021dd in QEventLoop::processEvents (this=0xb04d82a0, flags=...) at kernel/qeventloop.cpp:149
#12 0x07e02421 in QEventLoop::exec (this=0xb04d82a0, flags=...) at kernel/qeventloop.cpp:201
#13 0x07d0590b in QThread::exec (this=0x92bbf50) at thread/qthread.cpp:498
#14 0x07de2e2d in QInotifyFileSystemWatcherEngine::run (this=0x92bbf50) at io/qfilesystemwatcher_inotify.cpp:248
#15 0x07d087b3 in QThreadPrivate::start (arg=0x92bbf50) at thread/qthread_unix.cpp:331
#16 0x08154d31 in start_thread (arg=0xb04d8b70) at pthread_create.c:304
#17 0x002fe0ce in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:130
Backtrace stopped: Not enough registers or memory available to unwind further

Thread 3 (Thread 0xafaffb70 (LWP 1802)):
#0  0x08156dbd in __pthread_mutex_lock (mutex=0x930cdac) at pthread_mutex_lock.c:61
#1  0x0030bf14 in pthread_mutex_lock (mutex=0x930cdac) at forward.c:182
#2  0x041eab9b in g_main_context_query () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0x041eb664 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#4  0x041ebc2a in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#5  0x07e31b37 in QEventDispatcherGlib::processEvents (this=0x92c2f20, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#6  0x07e021dd in QEventLoop::processEvents (this=0xafaff2a0, flags=...) at kernel/qeventloop.cpp:149
#7  0x07e02421 in QEventLoop::exec (this=0xafaff2a0, flags=...) at kernel/qeventloop.cpp:201
#8  0x07d0590b in QThread::exec (this=0x92dd760) at thread/qthread.cpp:498
#9  0x07de2e2d in QInotifyFileSystemWatcherEngine::run (this=0x92dd760) at io/qfilesystemwatcher_inotify.cpp:248
#10 0x07d087b3 in QThreadPrivate::start (arg=0x92dd760) at thread/qthread_unix.cpp:331
#11 0x08154d31 in start_thread (arg=0xafaffb70) at pthread_create.c:304
#12 0x002fe0ce in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:130
Backtrace stopped: Not enough registers or memory available to unwind further

Thread 2 (Thread 0xae2fcb70 (LWP 1808)):
#0  0x00cd7416 in __kernel_vsyscall ()
#1  0x002ef40e in __GI___poll (fds=0x939f0e0, nfds=3, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:87
#2  0x041fa34b in g_poll () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0x041eb896 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#4  0x041ebf9b in g_main_loop_run () from /lib/i386-linux-gnu/libglib-2.0.so.0
#5  0x05a6bcea in ?? () from /usr/lib/i386-linux-gnu/libgio-2.0.so.0
#6  0x042125f4 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#7  0x08154d31 in start_thread (arg=0xae2fcb70) at pthread_create.c:304
#8  0x002fe0ce in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:130
Backtrace stopped: Not enough registers or memory available to unwind further

Thread 1 (Thread 0xb76e4b20 (LWP 1800)):
[KCrash Handler]
#7  isNull (this=0x4) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:568
#8  operator! (this=0x4) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:574
#9  TaskManager::TaskItem::task (this=0x9894580) at ../../../libs/taskmanager/taskitem.cpp:113
#10 0x04e10662 in WindowTaskItem::publishIconGeometry (this=0x98af6c0) at ../../../../../plasma/desktop/applets/tasks/windowtaskitem.cpp:120
#11 0x04e21688 in AbstractTaskItem::timerEvent (this=0x98af6c0, event=0xbfd412ac) at ../../../../../plasma/desktop/applets/tasks/abstracttaskitem.cpp:439
#12 0x07e1b994 in QObject::event (this=0x98af6c0, e=0xbfd412ac) at kernel/qobject.cpp:1181
#13 0x01a5dbd4 in QGraphicsWidget::event (this=0x98af6c0, event=0xbfd412ac) at graphicsview/qgraphicswidget.cpp:1455
#14 0x0139ed54 in notify_helper (e=0xbfd412ac, receiver=0x98af6c0, this=0x8bddbb8) at kernel/qapplication.cpp:4486
#15 QApplicationPrivate::notify_helper (this=0x8bddbb8, receiver=0x98af6c0, e=0xbfd412ac) at kernel/qapplication.cpp:4458
#16 0x013a4103 in QApplication::notify (this=0xbfd412ac, receiver=0x98af6c0, e=0xbfd412ac) at kernel/qapplication.cpp:3886
#17 0x00ff5681 in KApplication::notify (this=0x8bc6198, receiver=0x98af6c0, event=0xbfd412ac) at ../../kdeui/kernel/kapplication.cpp:311
#18 0x07e0319e in QCoreApplication::notifyInternal (this=0x8bc6198, receiver=0x98af6c0, event=0xbfd412ac) at kernel/qcoreapplication.cpp:787
#19 0x07e33c10 in sendEvent (event=0xbfd412ac, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#20 QTimerInfoList::activateTimers (this=0x8bd9c34) at kernel/qeventdispatcher_unix.cpp:603
#21 0x07e31155 in timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:184
#22 idleTimerSourceDispatch (source=0x8bd9c68) at kernel/qeventdispatcher_glib.cpp:231
#23 0x041eb25f in g_main_context_dispatch () from /lib/i386-linux-gnu/libglib-2.0.so.0
#24 0x041eb990 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#25 0x041ebc2a in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#26 0x07e31ada in QEventDispatcherGlib::processEvents (this=0x8b80248, flags=...) at kernel/qeventdispatcher_glib.cpp:422
#27 0x01456e3a in QGuiEventDispatcherGlib::processEvents (this=0x8b80248, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#28 0x07e021dd in QEventLoop::processEvents (this=0xbfd41524, flags=...) at kernel/qeventloop.cpp:149
#29 0x07e02421 in QEventLoop::exec (this=0xbfd41524, flags=...) at kernel/qeventloop.cpp:201
#30 0x07e0719d in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#31 0x0139c8f4 in QApplication::exec () at kernel/qapplication.cpp:3760
#32 0x0046b18b in kdemain (argc=1, argv=0xbfd41724) at ../../../../plasma/desktop/shell/main.cpp:120
#33 0x0804850b in main (argc=1, argv=0xbfd41724) at plasma-desktop_dummy.cpp:3

Possible duplicates by query: bug 287714, bug 287670, bug 287637, bug 287611, bug 287588.

Reported using DrKonqi