Application: systemsettings (1.0)
KDE Platform Version: 4.7.4 (4.7.4)
Qt Version: 4.8.0
Operating System: Linux 3.2.5-3.fc16.x86_64 x86_64
Distribution: "Fedora release 16 (Verne)"

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

Navigated to System Settings -> Multimedia -> Phonon -> Notifications, selected "Internal Audio Analog Stereo" (my only option) and clicked the "Test" button.  I'm also getting crashes from KNotify pretty much anytime it tries to notify me of any action.

-- Backtrace:
Application: System Settings (systemsettings), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
82	T_PSEUDO (SYSCALL_SYMBOL, SYSCALL_NAME, SYSCALL_NARGS)
[KCrash Handler]
#6  Phonon::Gstreamer::Pipeline::setState (this=0x0, state=GST_STATE_PLAYING) at /usr/src/debug/phonon-backend-gstreamer-4.5.90/gstreamer/pipeline.cpp:220
#7  0x00007f6142e1af1f in DevicePreference::on_testPlaybackButton_toggled (this=0x2fd5170, down=<optimized out>) at /usr/src/debug/kde-runtime-4.7.4/phonon/kcm/devicepreference.cpp:936
#8  0x00007f6142e22d0b in DevicePreference::qt_metacall (this=0x2fd5170, _c=QMetaObject::InvokeMetaMethod, _id=<optimized out>, _a=0x7fff3349f7c0) at /usr/src/debug/kde-runtime-4.7.4/x86_64-redhat-linux-gnu/phonon/kcm/moc_devicepreference.cpp:119
#9  0x00007f617608fedd in QMetaObject::activate (sender=0x2fe6850, m=<optimized out>, local_signal_index=<optimized out>, argv=0x7fff3349f7c0) at kernel/qobject.cpp:3566
#10 0x00007f617737e242 in QAbstractButton::toggled (this=<optimized out>, _t1=true) at .moc/release-shared/moc_qabstractbutton.cpp:227
#11 0x00007f61770c1c1e in QAbstractButton::setChecked (this=0x2fe6850, checked=true) at widgets/qabstractbutton.cpp:766
#12 0x00007f61770c18ba in QAbstractButtonPrivate::click (this=0x2fe6880) at widgets/qabstractbutton.cpp:528
#13 0x00007f61770c1b6c in QAbstractButton::mouseReleaseEvent (this=0x2fe6850, e=0x7fff334a00a0) at widgets/qabstractbutton.cpp:1121
#14 0x00007f617717ecba in QToolButton::mouseReleaseEvent (this=<optimized out>, e=<optimized out>) at widgets/qtoolbutton.cpp:718
#15 0x00007f6176d4b02a in QWidget::event (this=0x2fe6850, event=0x7fff334a00a0) at kernel/qwidget.cpp:8361
#16 0x00007f6176cfa994 in notify_helper (e=0x7fff334a00a0, receiver=0x2fe6850, this=0x1e4bd70) at kernel/qapplication.cpp:4550
#17 QApplicationPrivate::notify_helper (this=0x1e4bd70, receiver=0x2fe6850, e=0x7fff334a00a0) at kernel/qapplication.cpp:4522
#18 0x00007f6176d000e3 in QApplication::notify (this=<optimized out>, receiver=0x2fe6850, e=0x7fff334a00a0) at kernel/qapplication.cpp:4093
#19 0x00007f6177c90766 in KApplication::notify (this=0x7fff334a0da0, receiver=0x2fe6850, event=0x7fff334a00a0) at /usr/src/debug/kdelibs-4.7.4/kdeui/kernel/kapplication.cpp:311
#20 0x00007f617607c04c in QCoreApplication::notifyInternal (this=0x7fff334a0da0, receiver=0x2fe6850, event=0x7fff334a00a0) at kernel/qcoreapplication.cpp:876
#21 0x00007f6176cfb962 in sendEvent (event=<optimized out>, receiver=<optimized out>) at ../../src/corelib/kernel/qcoreapplication.h:231
#22 QApplicationPrivate::sendMouseEvent (receiver=0x2fe6850, event=0x7fff334a00a0, alienWidget=0x2fe6850, nativeWidget=0x2514c70, buttonDown=0x2fe6850, lastMouseReceiver=..., spontaneous=true) at kernel/qapplication.cpp:3161
#23 0x00007f6176d772e5 in QETWidget::translateMouseEvent (this=0x2514c70, event=<optimized out>) at kernel/qapplication_x11.cpp:4520
#24 0x00007f6176d761aa in QApplication::x11ProcessEvent (this=0x7fff334a0da0, event=0x7fff334a0960) at kernel/qapplication_x11.cpp:3641
#25 0x00007f6176d9d97c in x11EventSourceDispatch (s=0x1e3fab0, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:148
#26 0x00007f6170d24acd in g_main_dispatch (context=0x1e3f400) at gmain.c:2441
#27 g_main_context_dispatch (context=0x1e3f400) at gmain.c:3011
#28 0x00007f6170d252c8 in g_main_context_iterate (context=0x1e3f400, block=<optimized out>, dispatch=1, self=<optimized out>) at gmain.c:3089
#29 0x00007f6170d2549c in g_main_context_iteration (context=0x1e3f400, may_block=1) at gmain.c:3152
#30 0x00007f61760aad5f in QEventDispatcherGlib::processEvents (this=0x1e0e990, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#31 0x00007f6176d9d66e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=<optimized out>) at kernel/qguieventdispatcher_glib.cpp:207
#32 0x00007f617607b182 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#33 0x00007f617607b3d7 in QEventLoop::exec (this=0x7fff334a0d30, flags=...) at kernel/qeventloop.cpp:204
#34 0x00007f617607fdd5 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1148
#35 0x000000000040a835 in ?? ()
#36 0x00007f61751b269d in __libc_start_main (main=0x40a420, argc=5, ubp_av=0x7fff334a1068, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff334a1058) at libc-start.c:226
#37 0x000000000040a889 in _start ()

Reported using DrKonqi