Application: plasma-desktop (0.4)
KDE Platform Version: 4.6.5 (4.6.5)
Qt Version: 4.7.4
Operating System: Linux 2.6.41.4-1.fc15.x86_64 x86_64
Distribution (Platform): Fedora RPMs

-- Information about the crash:
The desktop seems to crash just after login as it's setting the background display image.
My X envirnment has 3 screens being driven by Xinerama ( as xrandr does not support multiple graphics cards ) and it's background screen on the 2nd card that is not displayed before the crash.
After the crash, all 3 backgrounds are configured correctly and the desktop works fine until I logout/login again.

The crash can be reproduced every time.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
82	T_PSEUDO (SYSCALL_SYMBOL, SYSCALL_NAME, SYSCALL_NARGS)
[Current thread is 1 (Thread 0x7f66e79f4840 (LWP 1827))]

Thread 2 (Thread 0x7f66cef29700 (LWP 1831)):
#0  0x000000305440a999 in __pthread_mutex_unlock_usercnt (mutex=0x7f66c80009b8, decr=<optimized out>) at pthread_mutex_unlock.c:53
#1  __pthread_mutex_unlock (mutex=0x7f66c80009b8) at pthread_mutex_unlock.c:298
#2  0x0000003055c41cb4 in g_main_context_prepare (context=0x7f66c80009b0, priority=0x7f66cef28be8) at gmain.c:2760
#3  0x0000003055c42bbd in g_main_context_iterate (context=0x7f66c80009b0, block=1, dispatch=1, self=<optimized out>) at gmain.c:3072
#4  0x0000003055c4325c in g_main_context_iteration (context=0x7f66c80009b0, may_block=1) at gmain.c:3155
#5  0x0000003d759853e6 in QEventDispatcherGlib::processEvents (this=0x7f66c80008c0, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#6  0x0000003d75959df2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#7  0x0000003d75959fef in QEventLoop::exec (this=0x7f66cef28d10, flags=...) at kernel/qeventloop.cpp:201
#8  0x0000003d7587207f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#9  0x0000003d7593ce9f in QInotifyFileSystemWatcherEngine::run (this=0x2f93930) at io/qfilesystemwatcher_inotify.cpp:248
#10 0x0000003d75874af5 in QThreadPrivate::start (arg=0x2f93930) at thread/qthread_unix.cpp:331
#11 0x0000003054407b31 in start_thread (arg=0x7f66cef29700) at pthread_create.c:305
#12 0x0000003053cdfd2d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:115

Thread 1 (Thread 0x7f66e79f4840 (LWP 1827)):
[KCrash Handler]
#6  0x0000003d77793914 in QGraphicsLayoutItem::isLayout (this=0x321e1a0) at graphicsview/qgraphicslayoutitem.cpp:868
#7  0x0000003d777928c2 in QGraphicsLayoutPrivate::activateRecursive (this=0x29de3a0, item=0x321e1a0) at graphicsview/qgraphicslayout_p.cpp:181
#8  0x0000003d77792904 in QGraphicsLayoutPrivate::activateRecursive (this=0x29de3a0, item=0x295af90) at graphicsview/qgraphicslayout_p.cpp:194
#9  0x0000003d777922db in QGraphicsLayout::activate (this=0x295af90) at graphicsview/qgraphicslayout.cpp:261
#10 0x0000003d77792399 in QGraphicsLayout::widgetEvent (this=0x295af90, e=<optimized out>) at graphicsview/qgraphicslayout.cpp:389
#11 0x0000003d777d055a in QGraphicsWidget::event (this=0x29c5b50, event=0x3207cc0) at graphicsview/qgraphicswidget.cpp:1379
#12 0x0000003d771bcc64 in notify_helper (e=0x3207cc0, receiver=0x29c5b50, this=0x261cd00) at kernel/qapplication.cpp:4481
#13 QApplicationPrivate::notify_helper (this=0x261cd00, receiver=0x29c5b50, e=0x3207cc0) at kernel/qapplication.cpp:4453
#14 0x0000003d771c1af1 in QApplication::notify (this=0x260cd80, receiver=0x29c5b50, e=0x3207cc0) at kernel/qapplication.cpp:4360
#15 0x0000003d780431c6 in KApplication::notify (this=0x260cd80, receiver=0x29c5b50, event=0x3207cc0) at /usr/src/debug/kdelibs-4.6.5/kdeui/kernel/kapplication.cpp:311
#16 0x0000003d7595a8dc in QCoreApplication::notifyInternal (this=0x260cd80, receiver=0x29c5b50, event=0x3207cc0) at kernel/qcoreapplication.cpp:787
#17 0x0000003d7595df18 in sendEvent (event=0x3207cc0, receiver=0x29c5b50) at kernel/qcoreapplication.h:215
#18 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x25ae350) at kernel/qcoreapplication.cpp:1428
#19 0x0000003d75984f23 in sendPostedEvents () at kernel/qcoreapplication.h:220
#20 postEventSourceDispatch (s=0x261ae00) at kernel/qeventdispatcher_glib.cpp:277
#21 0x0000003055c427ed in g_main_dispatch (context=0x2619ce0) at gmain.c:2441
#22 g_main_context_dispatch (context=0x2619ce0) at gmain.c:3014
#23 0x0000003055c42fc8 in g_main_context_iterate (context=0x2619ce0, block=<optimized out>, dispatch=1, self=<optimized out>) at gmain.c:3092
#24 0x0000003055c4325c in g_main_context_iteration (context=0x2619ce0, may_block=1) at gmain.c:3155
#25 0x0000003d7598537f in QEventDispatcherGlib::processEvents (this=0x25afa40, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:422
#26 0x0000003d7725fbae in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=<optimized out>) at kernel/qguieventdispatcher_glib.cpp:207
#27 0x0000003d75959df2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#28 0x0000003d75959fef in QEventLoop::exec (this=0x7fff476fe000, flags=...) at kernel/qeventloop.cpp:201
#29 0x0000003d7595e107 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#30 0x0000003d8043f203 in kdemain (argc=1, argv=0x7fff476fe3e8) at /usr/src/debug/kdebase-workspace-4.6.5/plasma/desktop/shell/main.cpp:120
#31 0x0000003053c2139d in __libc_start_main (main=0x400890 <main(int, char**)>, argc=1, ubp_av=0x7fff476fe3e8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff476fe3d8) at libc-start.c:226
#32 0x00000000004008c1 in _start ()

This bug may be a duplicate of or related to bug 241685.

Possible duplicates by query: bug 291386, bug 291348, bug 290277, bug 290183, bug 289491.

Reported using DrKonqi