Application: kmix (4)
KDE Platform Version: 4.8.2 (4.8.2)
Qt Version: 4.8.1
Operating System: Linux 3.2.0-23-generic x86_64
Distribution: Ubuntu precise (development branch)

-- Information about the crash:
kmix regularly crashes while using applications such as Skype, Jitsi, and VLC. The crash seems to happen when a new sound is played (skype message, next track in playlist begins). by "regularly", I mean that it happens once every ten minutes, depending on system usage.

- What I was doing when the application crashed:

this time, I was having a lengthy conversation over jitsi, when kmix died. this time, it seemed to be triggered by the "new message" sound in jitsi. 

while installing the debugging symbols in ubuntu, I started up VLC, and began playing an album. when the playlist hit track 2, kmix crashed again. I opted not to file a second bug. :)

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 0x7f6d06b4c780 (LWP 16338))]

Thread 3 (Thread 0x7f6ce6b18700 (LWP 16339)):
#0  0x00007f6d06411b03 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f6cfc21dff6 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f6cfc21e124 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6d03198426 in QEventDispatcherGlib::processEvents (this=0x7f6ce00008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#4  0x00007f6d03167c82 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f6d03167ed7 in QEventLoop::exec (this=0x7f6ce6b17dd0, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007f6d03066fa7 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:501
#7  0x00007f6d031479ff in QInotifyFileSystemWatcherEngine::run (this=0x2773260) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007f6d03069fcb in QThreadPrivate::start (arg=0x2773260) at thread/qthread_unix.cpp:298
#9  0x00007f6cfcd84e9a in start_thread (arg=0x7f6ce6b18700) at pthread_create.c:308
#10 0x00007f6d0641d4bd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f6ce610b700 (LWP 16340)):
#0  0x00007f6d06411b03 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f6cfc21dff6 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f6cfc21e124 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6d03198426 in QEventDispatcherGlib::processEvents (this=0x7f6cd40008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#4  0x00007f6d03167c82 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f6d03167ed7 in QEventLoop::exec (this=0x7f6ce610add0, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007f6d03066fa7 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:501
#7  0x00007f6d031479ff in QInotifyFileSystemWatcherEngine::run (this=0x242d0f0) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007f6d03069fcb in QThreadPrivate::start (arg=0x242d0f0) at thread/qthread_unix.cpp:298
#9  0x00007f6cfcd84e9a in start_thread (arg=0x7f6ce610b700) at pthread_create.c:308
#10 0x00007f6d0641d4bd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f6d06b4c780 (LWP 16338)):
[KCrash Handler]
#6  0x00007f6d034be820 in QMapData::shared_null () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#7  0x00007f6d0673de26 in MDWSlider::update (this=0x2823b60) at ../../kmix/gui/mdwslider.cpp:1001
#8  0x00007f6d0673964b in ViewDockAreaPopup::refreshVolumeLevels (this=<optimized out>) at ../../kmix/gui/viewdockareapopup.cpp:168
#9  0x00007f6d0317d281 in QMetaObject::activate (sender=0x257eed0, m=<optimized out>, local_signal_index=<optimized out>, argv=0x0) at kernel/qobject.cpp:3547
#10 0x00007f6d0317d281 in QMetaObject::activate (sender=0x27a3940, m=<optimized out>, local_signal_index=<optimized out>, argv=0x0) at kernel/qobject.cpp:3547
#11 0x00007f6d06712b0c in Mixer_Backend::readSetFromHW (this=0x27a3940) at ../../kmix/backends/mixer_backend.cpp:155
#12 0x00007f6d06722df5 in sink_cb (c=<optimized out>, i=<optimized out>, eol=<optimized out>) at ../../kmix/backends/mixer_pulse.cpp:191
#13 0x00007f6d04afa944 in ?? () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#14 0x00007f6cfc73c693 in ?? () from /usr/lib/x86_64-linux-gnu/libpulsecommon-1.1.so
#15 0x00007f6cfc73ca03 in pa_pdispatch_run () from /usr/lib/x86_64-linux-gnu/libpulsecommon-1.1.so
#16 0x00007f6d04af0bdd in ?? () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#17 0x00007f6cfc7412a9 in ?? () from /usr/lib/x86_64-linux-gnu/libpulsecommon-1.1.so
#18 0x00007f6d048deab3 in ?? () from /usr/lib/x86_64-linux-gnu/libpulse-mainloop-glib.so.0
#19 0x00007f6cfc21dc9a in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#20 0x00007f6cfc21e060 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#21 0x00007f6cfc21e124 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#22 0x00007f6d031983bf in QEventDispatcherGlib::processEvents (this=0x239bad0, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#23 0x00007f6d03e82d6e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#24 0x00007f6d03167c82 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#25 0x00007f6d03167ed7 in QEventLoop::exec (this=0x7fffb1aad9f0, flags=...) at kernel/qeventloop.cpp:204
#26 0x00007f6d0316cf67 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1148
#27 0x00007f6d0672a3e2 in kdemain (argc=1, argv=0x7fffb1aadf78) at ../../kmix/apps/main.cpp:76
#28 0x00007f6d0634c76d in __libc_start_main (main=0x400630 <main(int, char**)>, argc=1, ubp_av=0x7fffb1aadf78, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffb1aadf68) at libc-start.c:226
#29 0x0000000000400661 in _start ()

This bug may be a duplicate of or related to bug 298377.

Possible duplicates by query: bug 298377, bug 298324, bug 298305, bug 298279, bug 298272.

Reported using DrKonqi