Application: kmix (4)
KDE Platform Version: 4.8.1 (4.8.1)
Qt Version: 4.8.0
Operating System: Linux 3.0.0-17-generic i686
Distribution: Ubuntu 11.10

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

Play a mp4 movie with latest VideoLAN (VLC) player and KMix crashes with no sound heard. Restart KMix from console and sound is back on with the following trace:

$ QDBusConnection: session D-Bus connection created before QCoreApplication. Application may misbehave.
QDBusConnection: session D-Bus connection created before QCoreApplication. Application may misbehave.
QLayout: Attempting to add QLayout "" to ViewSliders "", which already has a layout
QLayout: Attempting to add QLayout "" to ViewSliders "", which already has a layout
QLayout: Attempting to add QLayout "" to ViewSliders "", which already has a layout
QLayout: Attempting to add QLayout "" to ViewSliders "", which already has a layout
QObject::connect: Incompatible sender/receiver arguments
        KMenu::aboutToShow() --> KMixDockWidget::activateMenuOrWindow(bool,QPoint)
kmix(9602) context_state_callback: Connection to PulseAudio daemon closed. Attempting reconnection. 
KCrash: Application 'kmix' crashing...
KCrash: Attempting to start /usr/lib/kde4/libexec/drkonqi from kdeinit
sock_file=/home/wizter/.kde/socket-uzumaki/kdeinit4__0
QSocketNotifier: Invalid socket 15 and type 'Read', disabling...
QSocketNotifier: Invalid socket 10 and type 'Read', disabling...

The crash can be reproduced some of the time.

-- Backtrace:
Application: KMix (kmix), signal: Segmentation fault
[Current thread is 1 (Thread 0xb7735720 (LWP 9995))]

Thread 3 (Thread 0xb0992b70 (LWP 10000)):
#0  0x00aa4d50 in __pthread_mutex_unlock_usercnt () from /lib/i386-linux-gnu/libpthread.so.0
#1  0x00c7a2f4 in pthread_mutex_unlock () from /lib/i386-linux-gnu/libc.so.6
#2  0x05a5e565 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#3  0x05a5ec2a in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#4  0x03505217 in QEventDispatcherGlib::processEvents (this=0xa1aa3b8, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#5  0x034d0d6d in QEventLoop::processEvents (this=0xb0992290, flags=...) at kernel/qeventloop.cpp:149
#6  0x034d1009 in QEventLoop::exec (this=0xb0992290, flags=...) at kernel/qeventloop.cpp:204
#7  0x033ba9dc in QThread::exec (this=0xa13a3a8) at thread/qthread.cpp:501
#8  0x034ae2dd in QInotifyFileSystemWatcherEngine::run (this=0xa13a3a8) at io/qfilesystemwatcher_inotify.cpp:248
#9  0x033bde70 in QThreadPrivate::start (arg=0xa13a3a8) at thread/qthread_unix.cpp:298
#10 0x00aa1d31 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#11 0x00c6c46e in clone () from /lib/i386-linux-gnu/libc.so.6
Backtrace stopped: Not enough registers or memory available to unwind further

Thread 2 (Thread 0xabffeb70 (LWP 10001)):
#0  0x002d1d10 in clock_gettime () from /lib/i386-linux-gnu/librt.so.1
#1  0x0341be35 in do_gettime (frac=0xabffdff0, sec=0xabffdfe8) at tools/qelapsedtimer_unix.cpp:123
#2  qt_gettime () at tools/qelapsedtimer_unix.cpp:140
#3  0x03505b56 in QTimerInfoList::updateCurrentTime (this=0xa34c234) at kernel/qeventdispatcher_unix.cpp:343
#4  0x03505eaa in QTimerInfoList::timerWait (this=0xa34c234, tm=...) at kernel/qeventdispatcher_unix.cpp:450
#5  0x035046c3 in timerSourcePrepareHelper (src=<optimized out>, timeout=0xabffe0fc) at kernel/qeventdispatcher_glib.cpp:136
#6  0x0350475d in timerSourcePrepare (source=0xa34c200, timeout=<optimized out>) at kernel/qeventdispatcher_glib.cpp:169
#7  0x05a5d88c in g_main_context_prepare () from /lib/i386-linux-gnu/libglib-2.0.so.0
#8  0x05a5e637 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#9  0x05a5ec2a in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#10 0x03505217 in QEventDispatcherGlib::processEvents (this=0xa3205d8, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#11 0x034d0d6d in QEventLoop::processEvents (this=0xabffe290, flags=...) at kernel/qeventloop.cpp:149
#12 0x034d1009 in QEventLoop::exec (this=0xabffe290, flags=...) at kernel/qeventloop.cpp:204
#13 0x033ba9dc in QThread::exec (this=0xa3487f0) at thread/qthread.cpp:501
#14 0x034ae2dd in QInotifyFileSystemWatcherEngine::run (this=0xa3487f0) at io/qfilesystemwatcher_inotify.cpp:248
#15 0x033bde70 in QThreadPrivate::start (arg=0xa3487f0) at thread/qthread_unix.cpp:298
#16 0x00aa1d31 in start_thread () from /lib/i386-linux-gnu/libpthread.so.0
#17 0x00c6c46e in clone () from /lib/i386-linux-gnu/libc.so.6
Backtrace stopped: Not enough registers or memory available to unwind further

Thread 1 (Thread 0xb7735720 (LWP 9995)):
[KCrash Handler]
#7  0x00000000 in ?? ()
#8  0x00e26978 in MDWSlider::update (this=0xa32ba30) at ../../kmix/gui/mdwslider.cpp:1001
#9  0x00e216d3 in ViewDockAreaPopup::refreshVolumeLevels (this=0xa321f78) at ../../kmix/gui/viewdockareapopup.cpp:168
#10 0x00e1e41f in ViewBase::qt_metacall (this=0xa321f78, _c=QMetaObject::InvokeMetaMethod, _id=<optimized out>, _a=0xbfbcb3c0) at ./viewbase.moc:87
#11 0x00e21082 in ViewDockAreaPopup::qt_metacall (this=0xa321f78, _c=QMetaObject::InvokeMetaMethod, _id=30, _a=0xbfbcb3c0) at ./viewdockareapopup.moc:73
#12 0x034d94fd in metacall (argv=0xbfbcb3c0, idx=30, cl=QMetaObject::InvokeMetaMethod, object=0xa321f78) at kernel/qmetaobject.cpp:245
#13 QMetaObject::metacall (object=0xa321f78, cl=QMetaObject::InvokeMetaMethod, idx=30, argv=0xbfbcb3c0) at kernel/qmetaobject.cpp:240
#14 0x034e921d in QMetaObject::activate (sender=0xa146700, m=0xe61d48, local_signal_index=1, argv=0x0) at kernel/qobject.cpp:3566
#15 0x00e414f5 in Mixer::controlChanged (this=0xa146700) at ./mixer.moc:103
#16 0x00e4162c in Mixer::qt_metacall (this=0xa146700, _c=QMetaObject::InvokeMetaMethod, _id=<optimized out>, _a=0xbfbcb4f0) at ./mixer.moc:82
#17 0x034d94fd in metacall (argv=0xbfbcb4f0, idx=5, cl=QMetaObject::InvokeMetaMethod, object=0xa146700) at kernel/qmetaobject.cpp:245
#18 QMetaObject::metacall (object=0xa146700, cl=QMetaObject::InvokeMetaMethod, idx=5, argv=0xbfbcb4f0) at kernel/qmetaobject.cpp:240
#19 0x034e921d in QMetaObject::activate (sender=0xa1320d0, m=0xe5fce4, local_signal_index=0, argv=0x0) at kernel/qobject.cpp:3566
#20 0x00df6a95 in Mixer_Backend::controlChanged (this=0xa1320d0) at ./mixer_backend.moc:93
#21 0x00df6d58 in Mixer_Backend::readSetFromHW (this=0xa1320d0) at ../../kmix/backends/mixer_backend.cpp:155
#22 0x00e03c8a in Mixer_PULSE::triggerUpdate (this=0xa1320d0) at ../../kmix/backends/mixer_pulse.cpp:1286
#23 0x00e07ff5 in sink_cb (c=0xa1997b0, i=0x0, eol=1) at ../../kmix/backends/mixer_pulse.cpp:191
#24 0x00266035 in ?? () from /usr/lib/i386-linux-gnu/libpulse.so.0
#25 0x0136bebd in ?? () from /usr/lib/i386-linux-gnu/libpulsecommon-1.0.so
#26 0x0136c2c0 in pa_pdispatch_run () from /usr/lib/i386-linux-gnu/libpulsecommon-1.0.so
#27 0x00259add in ?? () from /usr/lib/i386-linux-gnu/libpulse.so.0
#28 0x01371893 in ?? () from /usr/lib/i386-linux-gnu/libpulsecommon-1.0.so
#29 0x0135bc18 in ?? () from /usr/lib/i386-linux-gnu/libpulsecommon-1.0.so
#30 0x00111aaa in ?? () from /usr/lib/i386-linux-gnu/libpulse-mainloop-glib.so.0
#31 0x05a5e25f in g_main_context_dispatch () from /lib/i386-linux-gnu/libglib-2.0.so.0
#32 0x05a5e990 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#33 0x05a5ec2a in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#34 0x035051b7 in QEventDispatcherGlib::processEvents (this=0x9f4eeb8, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#35 0x01a9e06a in QGuiEventDispatcherGlib::processEvents (this=0x9f4eeb8, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#36 0x034d0d6d in QEventLoop::processEvents (this=0xbfbcbf64, flags=...) at kernel/qeventloop.cpp:149
#37 0x034d1009 in QEventLoop::exec (this=0xbfbcbf64, flags=...) at kernel/qeventloop.cpp:204
#38 0x034d671a in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1148
#39 0x019e66a4 in QApplication::exec () at kernel/qapplication.cpp:3816
#40 0x00e102ab in kdemain (argc=1, argv=0xbfbcc1c4) at ../../kmix/apps/main.cpp:76
#41 0x0804850b in main (argc=1, argv=0xbfbcc1c4) at kmix_dummy.cpp:3

Possible duplicates by query: bug 297448, bug 297431, bug 297087, bug 297013, bug 296998.

Reported using DrKonqi