Application: systemsettings (1.0)
KDE Platform Version: 4.4.85 (KDE 4.4.85 (KDE 4.5 Beta2))
Qt Version: 4.7.0
Operating System: Linux 2.6.32-22-generic x86_64
Distribution: Ubuntu maverick (development branch)

-- Information about the crash:
- What I was doing when the application crashed:
set frequency to 60Hz for both monitors (59.9 before)
set 1st screen to be left of 2nd 
pressed "apply"
- Unusual behavior I noticed:
All KDE typical settings (background, panels) disappeared completely

-- Backtrace:
Application: System Settings (systemsettings), signal: Segmentation fault
[Current thread is 1 (Thread 0x7fc991824760 (LWP 14738))]

Thread 2 (Thread 0x7fc97b98c710 (LWP 14739)):
#0  0x00007fc98ed0f653 in *__GI___poll (fds=<value optimized out>, nfds=<value optimized out>, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007fc98beeaf19 in g_main_context_poll (context=0x1d503b0, block=<value optimized out>, dispatch=<value optimized out>, self=<value optimized out>)
    at /build/buildd/glib2.0-2.25.8/glib/gmain.c:2988
#2  g_main_context_iterate (context=0x1d503b0, block=<value optimized out>, dispatch=<value optimized out>, self=<value optimized out>) at /build/buildd/glib2.0-2.25.8/glib/gmain.c:2670
#3  0x00007fc98beeb36c in IA__g_main_context_iteration (context=0x1d503b0, may_block=1) at /build/buildd/glib2.0-2.25.8/glib/gmain.c:2738
#4  0x00007fc98f4599c6 in QEventDispatcherGlib::processEvents (this=0x1cb7d00, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:414
#5  0x00007fc98f42c5b2 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149
#6  0x00007fc98f42c98c in QEventLoop::exec (this=0x7fc97b98bdb0, flags=) at kernel/qeventloop.cpp:201
#7  0x00007fc98f3381cd in QThread::exec (this=<value optimized out>) at thread/qthread.cpp:490
#8  0x00007fc98f40c4d8 in QInotifyFileSystemWatcherEngine::run (this=0x1b7f0e0) at io/qfilesystemwatcher_inotify.cpp:248
#9  0x00007fc98f33b14e in QThreadPrivate::start (arg=0x1b7f0e0) at thread/qthread_unix.cpp:266
#10 0x00007fc98ea1f981 in start_thread (arg=<value optimized out>) at pthread_create.c:304
#11 0x00007fc98ed1bdad in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#12 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7fc991824760 (LWP 14738)):
[KCrash Handler]
#6  0x00007fc98f445336 in QObjectPrivate::isSignalConnected (sender=0x1e35fe0, m=<value optimized out>, local_signal_index=11, argv=0x7fff29838150) at kernel/qobject_p.h:223
#7  QMetaObject::activate (sender=0x1e35fe0, m=<value optimized out>, local_signal_index=11, argv=0x7fff29838150) at kernel/qobject.cpp:3203
#8  0x00007fc97ad55d2f in PackageKit::Transaction::finished(PackageKit::Transaction::ExitStatus, unsigned int) () from /usr/lib/libpackagekit-qt.so.12
#9  0x00007fc97ad51399 in PackageKit::ClientPrivate::serviceOwnerChanged(QString const&, QString const&, QString const&) () from /usr/lib/libpackagekit-qt.so.12
#10 0x00007fc97ad52e88 in PackageKit::ClientPrivate::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libpackagekit-qt.so.12
#11 0x00007fc98f445597 in QMetaObject::activate (sender=0x189e090, m=<value optimized out>, local_signal_index=<value optimized out>, argv=0x0) at kernel/qobject.cpp:3280
#12 0x00007fc98f7c1ecf in QDBusConnectionInterface::serviceOwnerChanged (this=0xd, _t1=<value optimized out>, _t2=<value optimized out>, _t3=<value optimized out>)
    at .moc/release-shared/moc_qdbusconnectioninterface.cpp:210
#13 0x00007fc98f7c2174 in QDBusConnectionInterface::qt_metacall (this=0x189e090, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff298385a0)
    at .moc/release-shared/moc_qdbusconnectioninterface.cpp:137
#14 0x00007fc98f445597 in QMetaObject::activate (sender=0x189e090, m=<value optimized out>, local_signal_index=<value optimized out>, argv=0x0) at kernel/qobject.cpp:3280
#15 0x00007fc98f7c1dff in QDBusConnectionInterface::NameOwnerChanged (this=0xd, _t1=<value optimized out>, _t2=<value optimized out>, _t3=<value optimized out>)
    at .moc/release-shared/moc_qdbusconnectioninterface.cpp:238
#16 0x00007fc98f7c21dc in QDBusConnectionInterface::qt_metacall (this=0x189e090, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff29838960)
    at .moc/release-shared/moc_qdbusconnectioninterface.cpp:141
#17 0x00007fc98f78493e in QDBusConnectionPrivate::deliverCall (this=<value optimized out>, object=<value optimized out>, msg=<value optimized out>, metaTypes=..., slotIdx=<value optimized out>)
    at qdbusintegrator.cpp:909
#18 0x00007fc98f78f76f in QDBusCallDeliveryEvent::placeMetaCall (this=0x4, object=0x2000) at qdbusintegrator_p.h:103
#19 0x00007fc98f43f66e in QObject::event (this=0x189e090, e=0xd) at kernel/qobject.cpp:1219
#20 0x00007fc990076a2c in QApplicationPrivate::notify_helper (this=0x18424b0, receiver=0x189e090, e=0x2134630) at kernel/qapplication.cpp:4358
#21 0x00007fc99007c4cd in QApplication::notify (this=0x7fff29839450, receiver=0x189e090, e=0x2134630) at kernel/qapplication.cpp:4241
#22 0x00007fc990dc4f16 in KApplication::notify (this=0x7fff29839450, receiver=0x189e090, event=0x2134630) at ../../kdeui/kernel/kapplication.cpp:302
#23 0x00007fc98f42d87c in QCoreApplication::notifyInternal (this=0x7fff29839450, receiver=0x189e090, event=0x2134630) at kernel/qcoreapplication.cpp:732
#24 0x00007fc98f4307a2 in QCoreApplication::sendEvent (receiver=0x0, event_type=<value optimized out>, data=0x181ad50) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#25 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=<value optimized out>, data=0x181ad50) at kernel/qcoreapplication.cpp:1373
#26 0x00007fc98f459e33 in QCoreApplication::sendPostedEvents (s=<value optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:220
#27 postEventSourceDispatch (s=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:276
#28 0x00007fc98bee7272 in g_main_dispatch (context=0x1844d20) at /build/buildd/glib2.0-2.25.8/glib/gmain.c:2044
#29 IA__g_main_context_dispatch (context=0x1844d20) at /build/buildd/glib2.0-2.25.8/glib/gmain.c:2597
#30 0x00007fc98beeb1b8 in g_main_context_iterate (context=0x1844d20, block=<value optimized out>, dispatch=<value optimized out>, self=<value optimized out>)
    at /build/buildd/glib2.0-2.25.8/glib/gmain.c:2675
#31 0x00007fc98beeb36c in IA__g_main_context_iteration (context=0x1844d20, may_block=1) at /build/buildd/glib2.0-2.25.8/glib/gmain.c:2738
#32 0x00007fc98f459973 in QEventDispatcherGlib::processEvents (this=0x181a400, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:412
#33 0x00007fc990127fde in QGuiEventDispatcherGlib::processEvents (this=0xd, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#34 0x00007fc98f42c5b2 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149
#35 0x00007fc98f42c98c in QEventLoop::exec (this=0x7fff298393a0, flags=) at kernel/qeventloop.cpp:201
#36 0x00007fc98f430a3b in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1009
#37 0x00000000004122b9 in main (argc=<value optimized out>, argv=<value optimized out>) at ../../../systemsettings/app/main.cpp:49

Reported using DrKonqi