Application: kmix (4)
KDE Platform Version: 4.8.1 (4.8.1)
Qt Version: 4.8.0
Operating System: Linux 3.2.0-18-generic x86_64
Distribution: Ubuntu precise (development branch)

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

Using the hardware volume keys on my ThinkPad T400. Crash happened a couple of times since yesterday (?)

xev codes:

KeyRelease event, serial 36, synthetic NO, window 0x3000001,
    root 0xb4, subw 0x3000002, time 170435835, (43,43), root:(46,672),
    state 0x0, keycode 122 (keysym 0x1008ff11, XF86AudioLowerVolume), same_screen YES,
    XLookupString gives 0 bytes: 
    XFilterEvent returns: False
KeyRelease event, serial 36, synthetic NO, window 0x3000001,
    root 0xb4, subw 0x3000002, time 170436271, (43,43), root:(46,672),
    state 0x0, keycode 123 (keysym 0x1008ff13, XF86AudioRaiseVolume), same_screen YES,
    XLookupString gives 0 bytes: 
    XFilterEvent returns: False

The crash can be reproduced every time.

-- Backtrace:
Application: KMix (kmix), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f7d5a199780 (LWP 5333))]

Thread 3 (Thread 0x7f7d39da1700 (LWP 5334)):
#0  0x00007f7d59a72d93 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f7d4f87f136 in g_main_context_poll (n_fds=1, fds=0x7f7d34002c00, timeout=-1, context=0x7f7d340009a0, priority=<optimized out>) at /build/buildd/glib2.0-2.31.20/./glib/gmain.c:3412
#2  g_main_context_iterate (dispatch=1, block=<optimized out>, context=0x7f7d340009a0, self=<optimized out>) at /build/buildd/glib2.0-2.31.20/./glib/gmain.c:3113
#3  g_main_context_iterate (context=0x7f7d340009a0, block=<optimized out>, dispatch=1, self=<optimized out>) at /build/buildd/glib2.0-2.31.20/./glib/gmain.c:3055
#4  0x00007f7d4f87f264 in g_main_context_iteration (context=0x7f7d340009a0, may_block=1) at /build/buildd/glib2.0-2.31.20/./glib/gmain.c:3179
#5  0x00007f7d567faa76 in QEventDispatcherGlib::processEvents (this=0x7f7d340008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#6  0x00007f7d567ca2d2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007f7d567ca527 in QEventLoop::exec (this=0x7f7d39da0dd0, flags=...) at kernel/qeventloop.cpp:204
#8  0x00007f7d566c9f97 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:501
#9  0x00007f7d567aa06f in QInotifyFileSystemWatcherEngine::run (this=0x129e5a0) at io/qfilesystemwatcher_inotify.cpp:248
#10 0x00007f7d566ccfbb in QThreadPrivate::start (arg=0x129e5a0) at thread/qthread_unix.cpp:298
#11 0x00007f7d503e5e9a in start_thread (arg=0x7f7d39da1700) at pthread_create.c:308
#12 0x00007f7d59a7e74d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#13 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f7d39395700 (LWP 5335)):
#0  0x00007f7d59a72d93 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f7d4f87f136 in g_main_context_poll (n_fds=1, fds=0x7f7d280029b0, timeout=-1, context=0x7f7d280009a0, priority=<optimized out>) at /build/buildd/glib2.0-2.31.20/./glib/gmain.c:3412
#2  g_main_context_iterate (dispatch=1, block=<optimized out>, context=0x7f7d280009a0, self=<optimized out>) at /build/buildd/glib2.0-2.31.20/./glib/gmain.c:3113
#3  g_main_context_iterate (context=0x7f7d280009a0, block=<optimized out>, dispatch=1, self=<optimized out>) at /build/buildd/glib2.0-2.31.20/./glib/gmain.c:3055
#4  0x00007f7d4f87f264 in g_main_context_iteration (context=0x7f7d280009a0, may_block=1) at /build/buildd/glib2.0-2.31.20/./glib/gmain.c:3179
#5  0x00007f7d567faa76 in QEventDispatcherGlib::processEvents (this=0x7f7d280008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#6  0x00007f7d567ca2d2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007f7d567ca527 in QEventLoop::exec (this=0x7f7d39394dd0, flags=...) at kernel/qeventloop.cpp:204
#8  0x00007f7d566c9f97 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:501
#9  0x00007f7d567aa06f in QInotifyFileSystemWatcherEngine::run (this=0x13e7e00) at io/qfilesystemwatcher_inotify.cpp:248
#10 0x00007f7d566ccfbb in QThreadPrivate::start (arg=0x13e7e00) at thread/qthread_unix.cpp:298
#11 0x00007f7d503e5e9a in start_thread (arg=0x7f7d39395700) at pthread_create.c:308
#12 0x00007f7d59a7e74d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#13 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f7d5a199780 (LWP 5333)):
[KCrash Handler]
#6  0x00007f7d57f02c00 in typeinfo for QGesture () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#7  0x00007f7d59d9ee26 in MDWSlider::update (this=0x13bbb00) at ../../kmix/gui/mdwslider.cpp:1001
#8  0x00007f7d59d9a64b in ViewDockAreaPopup::refreshVolumeLevels (this=<optimized out>) at ../../kmix/gui/viewdockareapopup.cpp:168
#9  0x00007f7d567df8d1 in QMetaObject::activate (sender=0x120a0d0, m=<optimized out>, local_signal_index=<optimized out>, argv=0x0) at kernel/qobject.cpp:3547
#10 0x00007f7d567df8d1 in QMetaObject::activate (sender=0x138cbc0, m=<optimized out>, local_signal_index=<optimized out>, argv=0x0) at kernel/qobject.cpp:3547
#11 0x00007f7d59d73b0c in Mixer_Backend::readSetFromHW (this=0x138cbc0) at ../../kmix/backends/mixer_backend.cpp:155
#12 0x00007f7d59d83df5 in sink_cb (c=<optimized out>, i=<optimized out>, eol=<optimized out>) at ../../kmix/backends/mixer_pulse.cpp:191
#13 0x00007f7d5815d944 in ?? () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#14 0x00007f7d4fd9d693 in ?? () from /usr/lib/x86_64-linux-gnu/libpulsecommon-1.1.so
#15 0x00007f7d4fd9da03 in pa_pdispatch_run () from /usr/lib/x86_64-linux-gnu/libpulsecommon-1.1.so
#16 0x00007f7d58153bdd in ?? () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#17 0x00007f7d4fda22a9 in ?? () from /usr/lib/x86_64-linux-gnu/libpulsecommon-1.1.so
#18 0x00007f7d57f41ab3 in ?? () from /usr/lib/x86_64-linux-gnu/libpulse-mainloop-glib.so.0
#19 0x00007f7d4f87edda in g_main_dispatch (context=0xf6b600) at /build/buildd/glib2.0-2.31.20/./glib/gmain.c:2510
#20 g_main_context_dispatch (context=0xf6b600) at /build/buildd/glib2.0-2.31.20/./glib/gmain.c:3047
#21 0x00007f7d4f87f1a0 in g_main_context_iterate (dispatch=1, block=<optimized out>, context=0xf6b600, self=<optimized out>) at /build/buildd/glib2.0-2.31.20/./glib/gmain.c:3118
#22 g_main_context_iterate (context=0xf6b600, block=<optimized out>, dispatch=1, self=<optimized out>) at /build/buildd/glib2.0-2.31.20/./glib/gmain.c:3055
#23 0x00007f7d4f87f264 in g_main_context_iteration (context=0xf6b600, may_block=1) at /build/buildd/glib2.0-2.31.20/./glib/gmain.c:3179
#24 0x00007f7d567faa0f in QEventDispatcherGlib::processEvents (this=0xf26ad0, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#25 0x00007f7d574e5aae in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#26 0x00007f7d567ca2d2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#27 0x00007f7d567ca527 in QEventLoop::exec (this=0x7fff66795970, flags=...) at kernel/qeventloop.cpp:204
#28 0x00007f7d567cf5b7 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1148
#29 0x00007f7d59d8b3e2 in kdemain (argc=5, argv=0x7fff66795ef8) at ../../kmix/apps/main.cpp:76
#30 0x00007f7d599af76d in __libc_start_main (main=0x400630 <main(int, char**)>, argc=5, ubp_av=0x7fff66795ef8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff66795ee8) at libc-start.c:226
#31 0x0000000000400661 in _start ()

Reported using DrKonqi