Application: systemsettings (1.0)
KDE Platform Version: 4.5.4 (KDE 4.5.4)
Qt Version: 4.7.1
Operating System: Linux 2.6.35.10-74.fc14.i686 i686
Distribution (Platform): Fedora RPMs

-- Information about the crash:
I was navigating in the system settings dialogues. Turning on compositing causes a seg fault and subsequent restarts of kde die with seg fault as well.

This problem was NOT related to compositing, just what I would consider "normal" user interaction.

-- Backtrace:
Application: System Settings (systemsettings), signal: Segmentation fault
[Current thread is 1 (Thread 0xb771b9b0 (LWP 4242))]

Thread 2 (Thread 0xac47bb70 (LWP 4293)):
#0  0x00c22416 in __kernel_vsyscall ()
#1  0x006d9b06 in poll () from /lib/libc.so.6
#2  0x008a2dac in g_poll (fds=0xabb00cc0, nfds=3, timeout=-1) at gpoll.c:132
#3  0x008928b7 in g_main_context_poll (context=0x8a1d270, block=1, dispatch=1, self=<value optimized out>) at gmain.c:3093
#4  g_main_context_iterate (context=0x8a1d270, block=1, dispatch=1, self=<value optimized out>) at gmain.c:2775
#5  0x0089304b in g_main_loop_run (loop=0x8a1d2f0) at gmain.c:2988
#6  0x01574ed5 in gdbus_shared_thread_func (data=0x0) at gdbusprivate.c:277
#7  0x008bbbd0 in g_thread_create_proxy (data=0x8a1d300) at gthread.c:1897
#8  0x007aaf19 in start_thread () from /lib/libpthread.so.0
#9  0x006e4c4e in clone () from /lib/libc.so.6

Thread 1 (Thread 0xb771b9b0 (LWP 4242)):
[KCrash Handler]
#7  count (sender=0x8914a30, m=0x1403444, local_signal_index=9, argv=0xbf99f584) at ../../src/corelib/tools/qvector.h:246
#8  QMetaObject::activate (sender=0x8914a30, m=0x1403444, local_signal_index=9, argv=0xbf99f584) at kernel/qobject.cpp:3220
#9  0x013dcd7a in PackageKit::Transaction::finished (this=0x8914a30, _t1=PackageKit::Enum::ExitFailed, _t2=0) at transaction.moc:203
#10 0x013d8cd0 in PackageKit::ClientPrivate::serviceUnregistered (this=0x88f2ea8) at clientprivate.cpp:75
#11 0x013d9160 in PackageKit::ClientPrivate::qt_metacall (this=0x88f2ea8, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0xbf99f6f8) at clientprivate.moc:75
#12 0x02da6b6b in QMetaObject::metacall (object=0x88f2ea8, cl=QMetaObject::InvokeMetaMethod, idx=5, argv=0xbf99f6f8) at kernel/qmetaobject.cpp:237
#13 0x02db6047 in QMetaObject::activate (sender=0x88f91f8, m=0xd8e7c4, local_signal_index=1, argv=0xbf99f6f8) at kernel/qobject.cpp:3272
#14 0x00d71f84 in QDBusServiceWatcher::serviceUnregistered (this=0x88f91f8, _t1=...) at .moc/release-shared/moc_qdbusservicewatcher.cpp:139
#15 0x00d72067 in QDBusServiceWatcherPrivate::_q_serviceOwnerChanged (this=0x88f9438, service=..., oldOwner=..., newOwner=...) at qdbusservicewatcher.cpp:86
#16 0x00d72a8e in QDBusServiceWatcher::qt_metacall (this=0x88f91f8, _c=QMetaObject::InvokeMetaMethod, _id=3, _a=0xbf99f89c) at .moc/release-shared/moc_qdbusservicewatcher.cpp:91
#17 0x00d33a15 in QDBusConnectionPrivate::deliverCall (this=0x88f2fd0, object=0x88f91f8, msg=..., metaTypes=..., slotIdx=7) at qdbusintegrator.cpp:919
#18 0x00d3f3f8 in QDBusCallDeliveryEvent::placeMetaCall (this=0x8867088, object=0x88f91f8) at qdbusintegrator_p.h:103
#19 0x02db5b4f in QObject::event (this=0x88f91f8, e=0x8867088) at kernel/qobject.cpp:1211
#20 0x0373b26c in QApplicationPrivate::notify_helper (this=0x83b5608, receiver=0x88f91f8, e=0x8867088) at kernel/qapplication.cpp:4445
#21 0x0373fed2 in QApplication::notify (this=0xbf9a013c, receiver=0x88f91f8, e=0x8867088) at kernel/qapplication.cpp:3845
#22 0x04279f7b in KApplication::notify (this=0xbf9a013c, receiver=0x88f91f8, event=0x8867088) at /usr/src/debug/kdelibs-4.5.4/kdeui/kernel/kapplication.cpp:310
#23 0x02da0333 in QCoreApplication::notifyInternal (this=0xbf9a013c, receiver=0x88f91f8, event=0x8867088) at kernel/qcoreapplication.cpp:732
#24 0x02da4085 in sendEvent (receiver=0x0, event_type=0, data=0x83928a8) at kernel/qcoreapplication.h:215
#25 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x83928a8) at kernel/qcoreapplication.cpp:1373
#26 0x02da425e in QCoreApplication::sendPostedEvents (receiver=0x0, event_type=0) at kernel/qcoreapplication.cpp:1266
#27 0x02dcdeb5 in sendPostedEvents (s=0x83b7710) at kernel/qcoreapplication.h:220
#28 postEventSourceDispatch (s=0x83b7710) at kernel/qeventdispatcher_glib.cpp:277
#29 0x00892192 in g_main_dispatch (context=0x83b7690) at gmain.c:2149
#30 g_main_context_dispatch (context=0x83b7690) at gmain.c:2702
#31 0x00892978 in g_main_context_iterate (context=0x83b7690, block=1, dispatch=1, self=<value optimized out>) at gmain.c:2780
#32 0x00892c35 in g_main_context_iteration (context=0x83b7690, may_block=1) at gmain.c:2843
#33 0x02dce02d in QEventDispatcherGlib::processEvents (this=0x8392358, flags=...) at kernel/qeventdispatcher_glib.cpp:415
#34 0x037ee406 in QGuiEventDispatcherGlib::processEvents (this=0x8392358, flags=...) at kernel/qguieventdispatcher_glib.cpp:207
#35 0x02d9f4ca in QEventLoop::processEvents (this=0xbf9a0094, flags=...) at kernel/qeventloop.cpp:149
#36 0x02d9f77a in QEventLoop::exec (this=0xbf9a0094, flags=...) at kernel/qeventloop.cpp:201
#37 0x02da4327 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1009
#38 0x03739078 in QApplication::exec () at kernel/qapplication.cpp:3719
#39 0x080571d8 in main (argc=) at /usr/src/debug/kdebase-workspace-4.5.4/systemsettings/app/main.cpp:49

Reported using DrKonqi