Application: knotify4 (4.14.6)
KDE Platform Version: 4.14.9
Qt Version: 4.8.6
Operating System: Linux 3.16.7-21-desktop x86_64
Distribution: "openSUSE 13.2 (Harlequin) (x86_64)"

-- Information about the crash:
- What I was doing when the application crashed: whenever a warning sound should be heard, KDE crash with or witout a warning concerning phonon and/or vlc.

Hardware : Linux server without loudspeaker
Have reinstall KDE
Have reinstall vlc
Have reinstall phonon

The crash can be reproduced every time.

-- Backtrace:
Application: KNotify (knotify4), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f6183589800 (LWP 2732))]

Thread 3 (Thread 0x7f617062f700 (LWP 2733)):
#0  0x00007f618076bc5d in poll () at /lib64/libc.so.6
#1  0x00007f617ddd5be4 in  () at /usr/lib64/libglib-2.0.so.0
#2  0x00007f617ddd5cec in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#3  0x00007f6180eee0de in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQtCore.so.4
#4  0x00007f6180ebfe6f in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQtCore.so.4
#5  0x00007f6180ec0165 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQtCore.so.4
#6  0x00007f6180dbd0bf in QThread::exec() () at /usr/lib64/libQtCore.so.4
#7  0x00007f6180ea1783 in  () at /usr/lib64/libQtCore.so.4
#8  0x00007f6180dbf79f in  () at /usr/lib64/libQtCore.so.4
#9  0x00007f617e7f20a4 in start_thread () at /lib64/libpthread.so.0
#10 0x00007f618077408d in clone () at /lib64/libc.so.6

Thread 2 (Thread 0x7f61611be700 (LWP 3755)):
#0  0x00007f618076bc5d in poll () at /lib64/libc.so.6
#1  0x00007f61616c9268 in  () at /usr/lib64/libusb-1.0.so.0
#2  0x00007f617e7f20a4 in start_thread () at /lib64/libpthread.so.0
#3  0x00007f618077408d in clone () at /lib64/libc.so.6

Thread 1 (Thread 0x7f6183589800 (LWP 2732)):
[KCrash Handler]
#5  0x00007f61807b2fe6 in __strcmp_ssse3 () at /lib64/libc.so.6
#6  0x00007f615f108b2e in QMetaType::registerNormalizedType(QByteArray const&, void (*)(void*), void* (*)(void const*), void (*)(void*), void* (*)(void*, void const*), int, QFlags<QMetaType::TypeFlag>, QMetaObject const*) () at /usr/lib64/libQt5Core.so.5
#7  0x00007f615f609077 in  () at /usr/lib64/libQt5Gui.so.5
#8  0x00007f618340992a in call_init.part () at /lib64/ld-linux-x86-64.so.2
#9  0x00007f6183409a13 in _dl_init_internal () at /lib64/ld-linux-x86-64.so.2
#10 0x00007f618340db48 in dl_open_worker () at /lib64/ld-linux-x86-64.so.2
#11 0x00007f61834097e4 in _dl_catch_error () at /lib64/ld-linux-x86-64.so.2
#12 0x00007f618340d33b in _dl_open () at /lib64/ld-linux-x86-64.so.2
#13 0x00007f617bf4c02b in dlopen_doit () at /lib64/libdl.so.2
#14 0x00007f61834097e4 in _dl_catch_error () at /lib64/ld-linux-x86-64.so.2
#15 0x00007f617bf4c5dd in _dlerror_run () at /lib64/libdl.so.2
#16 0x00007f617bf4c0c1 in dlopen@@GLIBC_2.2.5 () at /lib64/libdl.so.2
#17 0x00007f616f44659f in  () at /usr/lib64/libvlccore.so.7
#18 0x00007f616f42fd5d in  () at /usr/lib64/libvlccore.so.7
#19 0x00007f616f430057 in  () at /usr/lib64/libvlccore.so.7
#20 0x00007f616f4302c9 in  () at /usr/lib64/libvlccore.so.7
#21 0x00007f616f430534 in  () at /usr/lib64/libvlccore.so.7
#22 0x00007f616f430a87 in  () at /usr/lib64/libvlccore.so.7
#23 0x00007f616f3c849d in libvlc_InternalInit () at /usr/lib64/libvlccore.so.7
#24 0x00007f616f199623 in libvlc_new () at /usr/lib64/libvlc.so.5
#25 0x00007f616f6caec9 in  () at /usr/lib64/kde4/plugins/phonon_backend/phonon_vlc.so
#26 0x00007f616f6b0728 in  () at /usr/lib64/kde4/plugins/phonon_backend/phonon_vlc.so
#27 0x00007f616f6b11eb in qt_plugin_instance () at /usr/lib64/kde4/plugins/phonon_backend/phonon_vlc.so
#28 0x00007f6180ea5641 in QPluginLoader::instance() () at /usr/lib64/libQtCore.so.4
#29 0x00007f6170695f8b in  () at /usr/lib64/kde4/plugins/phonon_platform/kde.so
#30 0x00007f6170696773 in  () at /usr/lib64/kde4/plugins/phonon_platform/kde.so
#31 0x00007f6182b60c76 in  () at /usr/lib64/libphonon.so.4
#32 0x00007f6182b61317 in Phonon::Factory::backend(bool) () at /usr/lib64/libphonon.so.4
#33 0x00007f6182b618e3 in  () at /usr/lib64/libphonon.so.4
#34 0x00007f6182b599b9 in  () at /usr/lib64/libphonon.so.4
#35 0x00007f6182b57896 in  () at /usr/lib64/libphonon.so.4
#36 0x000000000040e771 in _start ()

Reported using DrKonqi