Application: kmix (4)
KDE Platform Version: 4.8.2 (4.8.2) (Compiled from sources)
Qt Version: 4.8.1
Operating System: Linux 3.2.0-24-generic x86_64
Distribution: Ubuntu 12.04 LTS

-- Information about the crash:
- What I was doing when the application crashed:
started up system, crashed automatically

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 0x7f4f40f7d780 (LWP 1827))]

Thread 3 (Thread 0x7f4f20d3d700 (LWP 1874)):
#0  0x00007f4f40838b03 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f4f36644ff6 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4f36645124 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4f3d5bf426 in QEventDispatcherGlib::processEvents (this=0x7f4f1c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#4  0x00007f4f3d58ec82 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f4f3d58eed7 in QEventLoop::exec (this=0x7f4f20d3cdd0, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007f4f3d48dfa7 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:501
#7  0x00007f4f3d56e9ff in QInotifyFileSystemWatcherEngine::run (this=0x2556c10) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007f4f3d490fcb in QThreadPrivate::start (arg=0x2556c10) at thread/qthread_unix.cpp:298
#9  0x00007f4f371abe9a in start_thread (arg=0x7f4f20d3d700) at pthread_create.c:308
#10 0x00007f4f408444bd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f4f17ffe700 (LWP 1894)):
#0  0x00007f4f40838b03 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f4f36644ff6 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f4f36645124 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f4f3d5bf426 in QEventDispatcherGlib::processEvents (this=0x7f4f100008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#4  0x00007f4f3d58ec82 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f4f3d58eed7 in QEventLoop::exec (this=0x7f4f17ffddd0, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007f4f3d48dfa7 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:501
#7  0x00007f4f3d56e9ff in QInotifyFileSystemWatcherEngine::run (this=0x2344790) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007f4f3d490fcb in QThreadPrivate::start (arg=0x2344790) at thread/qthread_unix.cpp:298
#9  0x00007f4f371abe9a in start_thread (arg=0x7f4f17ffe700) at pthread_create.c:308
#10 0x00007f4f408444bd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f4f40f7d780 (LWP 1827)):
[KCrash Handler]
#6  0x00007f4f3d8e58e0 in QString::shared_null () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#7  0x00007f4f40b64e26 in MDWSlider::update (this=0x2609090) at ../../kmix/gui/mdwslider.cpp:1001
#8  0x00007f4f40b6064b in ViewDockAreaPopup::refreshVolumeLevels (this=<optimized out>) at ../../kmix/gui/viewdockareapopup.cpp:168
#9  0x00007f4f3d5a4281 in QMetaObject::activate (sender=0x2567b60, m=<optimized out>, local_signal_index=<optimized out>, argv=0x0) at kernel/qobject.cpp:3547
#10 0x00007f4f3d5a4281 in QMetaObject::activate (sender=0x256a360, m=<optimized out>, local_signal_index=<optimized out>, argv=0x0) at kernel/qobject.cpp:3547
#11 0x00007f4f40b39b0c in Mixer_Backend::readSetFromHW (this=0x256a360) at ../../kmix/backends/mixer_backend.cpp:155
#12 0x00007f4f40b49df5 in sink_cb (c=<optimized out>, i=<optimized out>, eol=<optimized out>) at ../../kmix/backends/mixer_pulse.cpp:191
#13 0x00007f4f3ef21944 in ?? () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#14 0x00007f4f36b63693 in ?? () from /usr/lib/x86_64-linux-gnu/libpulsecommon-1.1.so
#15 0x00007f4f36b63a03 in pa_pdispatch_run () from /usr/lib/x86_64-linux-gnu/libpulsecommon-1.1.so
#16 0x00007f4f3ef17bdd in ?? () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#17 0x00007f4f36b682a9 in ?? () from /usr/lib/x86_64-linux-gnu/libpulsecommon-1.1.so
#18 0x00007f4f3ed05ab3 in ?? () from /usr/lib/x86_64-linux-gnu/libpulse-mainloop-glib.so.0
#19 0x00007f4f36644c9a in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#20 0x00007f4f36645060 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#21 0x00007f4f36645124 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#22 0x00007f4f3d5bf3bf in QEventDispatcherGlib::processEvents (this=0x215dad0, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#23 0x00007f4f3e2a9d5e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#24 0x00007f4f3d58ec82 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#25 0x00007f4f3d58eed7 in QEventLoop::exec (this=0x7fff162abd50, flags=...) at kernel/qeventloop.cpp:204
#26 0x00007f4f3d593f67 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1148
#27 0x00007f4f40b513e2 in kdemain (argc=1, argv=0x7fff162ac2d8) at ../../kmix/apps/main.cpp:76
#28 0x00007f4f4077376d in __libc_start_main (main=0x400630 <main(int, char**)>, argc=1, ubp_av=0x7fff162ac2d8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff162ac2c8) at libc-start.c:226
#29 0x0000000000400661 in _start ()

Possible duplicates by query: bug 298528, bug 295835.

Reported using DrKonqi