Application: kmix (4)
KDE Platform Version: 4.8.1 (4.8.1)
Qt Version: 4.8.0
Operating System: Linux 3.2.0-20-generic-pae i686
Distribution: Ubuntu precise (development branch)

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

Listening to music online - 

Kmix will crash every now and then (randomly).

Sometimes trying to use the laptop volume control fires the crash.

xsession-erros shows not much
KCrash: Application 'kmix' crashing...
kded(2172)/kmix sink_input_cb: Ignoring sink-input due to it being designated as an event and thus handled by the Event slider 
kded(2172)/kmix sink_input_cb: Ignoring sink-input due to it being designated as an event and thus handled by the Event slider 
KCrash: Application 'kmix' crashing...
KCrash: Application 'kmix' crashing...
KCrash: Application 'kmix' crashing...
KCrash: Application 'kmix' crashing...

The crash can be reproduced every time.

-- Backtrace:
Application: KMix (kmix), signal: Segmentation fault
Using host libthread_db library "/lib/i386-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0xb1af2740 (LWP 3156))]

Thread 3 (Thread 0xaa3d2b40 (LWP 3168)):
#0  0xb7704424 in __kernel_vsyscall ()
#1  0xb7594380 in poll () from /lib/i386-linux-gnu/libc.so.6
#2  0xb2d6db6b in g_poll () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0xb2d6010e in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#4  0xb2d60261 in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#5  0xb5b61067 in QEventDispatcherGlib::processEvents (this=0xa9a00468, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#6  0xb5b2cc8d in QEventLoop::processEvents (this=0xaa3d2240, flags=...) at kernel/qeventloop.cpp:149
#7  0xb5b2cf29 in QEventLoop::exec (this=0xaa3d2240, flags=...) at kernel/qeventloop.cpp:204
#8  0xb5a1694c in QThread::exec (this=0x8f8b058) at thread/qthread.cpp:501
#9  0xb5b0a2dd in QInotifyFileSystemWatcherEngine::run (this=0x8f8b058) at io/qfilesystemwatcher_inotify.cpp:248
#10 0xb5a19de0 in QThreadPrivate::start (arg=0x8f8b058) at thread/qthread_unix.cpp:298
#11 0xb2ed8d4c in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#12 0xb75a2ace in clone () from /lib/i386-linux-gnu/libc.so.6

Thread 2 (Thread 0xa59feb40 (LWP 3169)):
#0  0xb2eccdcd in clock_gettime () from /lib/i386-linux-gnu/librt.so.1
#1  0xb5a77da5 in do_gettime (frac=0xa59fdfb0, sec=0xa59fdfa8) at tools/qelapsedtimer_unix.cpp:123
#2  qt_gettime () at tools/qelapsedtimer_unix.cpp:140
#3  0xb5b619a6 in QTimerInfoList::updateCurrentTime (this=0xa5002074) at kernel/qeventdispatcher_unix.cpp:343
#4  0xb5b61cfa in QTimerInfoList::timerWait (this=0xa5002074, tm=...) at kernel/qeventdispatcher_unix.cpp:450
#5  0xb5b605a3 in timerSourcePrepareHelper (src=<optimized out>, timeout=0xa59fe0bc) at kernel/qeventdispatcher_glib.cpp:136
#6  0xb5b6063d in timerSourcePrepare (source=0xa5002040, timeout=<optimized out>) at kernel/qeventdispatcher_glib.cpp:169
#7  0xb2d5f802 in g_main_context_prepare () from /lib/i386-linux-gnu/libglib-2.0.so.0
#8  0xb2d6000f in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#9  0xb2d60261 in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#10 0xb5b61067 in QEventDispatcherGlib::processEvents (this=0xa5000468, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#11 0xb5b2cc8d in QEventLoop::processEvents (this=0xa59fe240, flags=...) at kernel/qeventloop.cpp:149
#12 0xb5b2cf29 in QEventLoop::exec (this=0xa59fe240, flags=...) at kernel/qeventloop.cpp:204
#13 0xb5a1694c in QThread::exec (this=0x90027e0) at thread/qthread.cpp:501
#14 0xb5b0a2dd in QInotifyFileSystemWatcherEngine::run (this=0x90027e0) at io/qfilesystemwatcher_inotify.cpp:248
#15 0xb5a19de0 in QThreadPrivate::start (arg=0x90027e0) at thread/qthread_unix.cpp:298
#16 0xb2ed8d4c in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#17 0xb75a2ace in clone () from /lib/i386-linux-gnu/libc.so.6

Thread 1 (Thread 0xb1af2740 (LWP 3156)):
[KCrash Handler]
#7  0x0070005f in ?? ()
#8  0xb76c4f78 in MDWSlider::update (this=0x8ff8d20) at ../../kmix/gui/mdwslider.cpp:1001
#9  0xb76bfc23 in ViewDockAreaPopup::refreshVolumeLevels (this=0x8ff8658) at ../../kmix/gui/viewdockareapopup.cpp:168
#10 0xb76bc913 in qt_static_metacall (_a=0xbff68080, _id=3, _o=0x8ff8658, _c=<optimized out>) at ./viewbase.moc:64
#11 ViewBase::qt_static_metacall (_o=0x8ff8658, _c=QMetaObject::InvokeMetaMethod, _id=3, _a=0xbff68080) at ./viewbase.moc:55
#12 0xb5b44e31 in QMetaObject::activate (sender=0x8d20208, m=0xb7700d48, local_signal_index=1, argv=0x0) at kernel/qobject.cpp:3547
#13 0xb76dfc75 in Mixer::controlChanged (this=0x8d20208) at ./mixer.moc:117
#14 0xb5b44e31 in QMetaObject::activate (sender=0x8fa3728, m=0xb76fec44, local_signal_index=0, argv=0x0) at kernel/qobject.cpp:3547
#15 0xb7694ea5 in Mixer_Backend::controlChanged (this=0x8fa3728) at ./mixer_backend.moc:107
#16 0xb76951a8 in Mixer_Backend::readSetFromHW (this=0x8fa3728) at ../../kmix/backends/mixer_backend.cpp:155
#17 0xb76a212a in Mixer_PULSE::triggerUpdate (this=0x8fa3728) at ../../kmix/backends/mixer_pulse.cpp:1286
#18 0xb76a647d in sink_cb (c=0x9035f30, i=0x0, eol=1) at ../../kmix/backends/mixer_pulse.cpp:191
#19 0xb6accb45 in ?? () from /usr/lib/i386-linux-gnu/libpulse.so.0
#20 0xb2e8beed in ?? () from /usr/lib/i386-linux-gnu/libpulsecommon-1.1.so
#21 0xb2e8c2f0 in pa_pdispatch_run () from /usr/lib/i386-linux-gnu/libpulsecommon-1.1.so
#22 0xb6ac0a1d in ?? () from /usr/lib/i386-linux-gnu/libpulse.so.0
#23 0xb2e918c3 in ?? () from /usr/lib/i386-linux-gnu/libpulsecommon-1.1.so
#24 0xb2e7bc28 in ?? () from /usr/lib/i386-linux-gnu/libpulsecommon-1.1.so
#25 0xb6aafa3a in ?? () from /usr/lib/i386-linux-gnu/libpulse-mainloop-glib.so.0
#26 0xb2d5fd7a in g_main_context_dispatch () from /lib/i386-linux-gnu/libglib-2.0.so.0
#27 0xb2d60185 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#28 0xb2d60261 in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#29 0xb5b61007 in QEventDispatcherGlib::processEvents (this=0x8d03ea0, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#30 0xb61d089a in QGuiEventDispatcherGlib::processEvents (this=0x8d03ea0, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#31 0xb5b2cc8d in QEventLoop::processEvents (this=0xbff68bb4, flags=...) at kernel/qeventloop.cpp:149
#32 0xb5b2cf29 in QEventLoop::exec (this=0xbff68bb4, flags=...) at kernel/qeventloop.cpp:204
#33 0xb5b3263a in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1148
#34 0xb61158c4 in QApplication::exec () at kernel/qapplication.cpp:3816
#35 0xb76ae79b in kdemain (argc=3, argv=0xbff68e14) at ../../kmix/apps/main.cpp:76
#36 0x0804850b in main (argc=3, argv=0xbff68e14) at kmix_dummy.cpp:3

This bug may be a duplicate of or related to bug 296809.

Possible duplicates by query: bug 296809, bug 296466, bug 296355, bug 296341, bug 288441.

Reported using DrKonqi