Bug 296194

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:

crashed after starting USB Arcam rDAC.
restarted and running without problems.
doing that every time

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 0x7fea92e63780 (LWP 1773))]

Thread 3 (Thread 0x7fea72ba0700 (LWP 1793)):
#0  0x00007fea8909605d in __pthread_mutex_unlock_usercnt (mutex=<optimized out>, decr=<optimized out>) at pthread_mutex_unlock.c:52
#1  __pthread_mutex_unlock (mutex=0x7fea6c000a60) at pthread_mutex_unlock.c:290
#2  0x00007fea88567451 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fea8852b853 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fea8852c05b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fea8852c264 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007fea8f4a7a76 in QEventDispatcherGlib::processEvents (this=0x7fea6c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#7  0x00007fea8f4772d2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#8  0x00007fea8f477527 in QEventLoop::exec (this=0x7fea72b9fdd0, flags=...) at kernel/qeventloop.cpp:204
#9  0x00007fea8f376f97 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:501
#10 0x00007fea8f45706f in QInotifyFileSystemWatcherEngine::run (this=0xb03090) at io/qfilesystemwatcher_inotify.cpp:248
#11 0x00007fea8f379fbb in QThreadPrivate::start (arg=0xb03090) at thread/qthread_unix.cpp:298
#12 0x00007fea89092e9a in start_thread (arg=0x7fea72ba0700) at pthread_create.c:308
#13 0x00007fea9272b74d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#14 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7fea72194700 (LWP 1826)):
#0  0x00007fea9271fd93 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007fea8852c136 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fea8852c264 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fea8f4a7a76 in QEventDispatcherGlib::processEvents (this=0x7fea600008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#4  0x00007fea8f4772d2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007fea8f477527 in QEventLoop::exec (this=0x7fea72193dd0, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007fea8f376f97 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:501
#7  0x00007fea8f45706f in QInotifyFileSystemWatcherEngine::run (this=0xc79120) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007fea8f379fbb in QThreadPrivate::start (arg=0xc79120) at thread/qthread_unix.cpp:298
#9  0x00007fea89092e9a in start_thread (arg=0x7fea72194700) at pthread_create.c:308
#10 0x00007fea9272b74d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7fea92e63780 (LWP 1773)):
[KCrash Handler]
#6  0x0000000000de6e10 in ?? ()
#7  0x00007fea92a4be26 in MDWSlider::update (this=0xe09f70) at ../../kmix/gui/mdwslider.cpp:1001
#8  0x00007fea92a4764b in ViewDockAreaPopup::refreshVolumeLevels (this=<optimized out>) at ../../kmix/gui/viewdockareapopup.cpp:168
#9  0x00007fea8f48c8d1 in QMetaObject::activate (sender=0xdc3890, m=<optimized out>, local_signal_index=<optimized out>, argv=0x0) at kernel/qobject.cpp:3547
#10 0x00007fea8f48c8d1 in QMetaObject::activate (sender=0xd7eec0, m=<optimized out>, local_signal_index=<optimized out>, argv=0x0) at kernel/qobject.cpp:3547
#11 0x00007fea92a20b0c in Mixer_Backend::readSetFromHW (this=0xd7eec0) at ../../kmix/backends/mixer_backend.cpp:155
#12 0x00007fea92a30df5 in sink_cb (c=<optimized out>, i=<optimized out>, eol=<optimized out>) at ../../kmix/backends/mixer_pulse.cpp:191
#13 0x00007fea90e0a944 in ?? () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#14 0x00007fea88a4a693 in ?? () from /usr/lib/x86_64-linux-gnu/libpulsecommon-1.1.so
#15 0x00007fea88a4aa03 in pa_pdispatch_run () from /usr/lib/x86_64-linux-gnu/libpulsecommon-1.1.so
#16 0x00007fea90e00bdd in ?? () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#17 0x00007fea88a4f2a9 in ?? () from /usr/lib/x86_64-linux-gnu/libpulsecommon-1.1.so
#18 0x00007fea90beeab3 in ?? () from /usr/lib/x86_64-linux-gnu/libpulse-mainloop-glib.so.0
#19 0x00007fea8852bdda in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#20 0x00007fea8852c1a0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#21 0x00007fea8852c264 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#22 0x00007fea8f4a7a0f in QEventDispatcherGlib::processEvents (this=0xa27ad0, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#23 0x00007fea90192aae in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#24 0x00007fea8f4772d2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#25 0x00007fea8f477527 in QEventLoop::exec (this=0x7fff06ecd360, flags=...) at kernel/qeventloop.cpp:204
#26 0x00007fea8f47c5b7 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1148
#27 0x00007fea92a383e2 in kdemain (argc=3, argv=0x7fff06ecd8e8) at ../../kmix/apps/main.cpp:76
#28 0x00007fea9265c76d in __libc_start_main (main=0x400630 <main(int, char**)>, argc=3, ubp_av=0x7fff06ecd8e8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff06ecd8d8) at libc-start.c:226
#29 0x0000000000400661 in _start ()

Possible duplicates by query: bug 296184, bug 296158, bug 296110, bug 296102, bug 296079.

Reported using DrKonqi