Application: kmix (4)
KDE Platform Version: 4.8.2 (4.8.2)
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:
I had used pkill to kill kmix and restarted it. it gave the following output. then I got a pop-up saying it crashed. 

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)

The crash can be reproduced some of the 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 0x7f6e42ff0780 (LWP 20232))]

Thread 3 (Thread 0x7f6e22fb4700 (LWP 20233)):
#0  0x00007f6e386f62e0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f6e386f6559 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f6e386ba729 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6e386baf1b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f6e386bb124 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f6e3f635426 in QEventDispatcherGlib::processEvents (this=0x7f6e1c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#6  0x00007f6e3f604c82 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007f6e3f604ed7 in QEventLoop::exec (this=0x7f6e22fb3dd0, flags=...) at kernel/qeventloop.cpp:204
#8  0x00007f6e3f503fa7 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:501
#9  0x00007f6e3f5e49ff in QInotifyFileSystemWatcherEngine::run (this=0x1caed00) at io/qfilesystemwatcher_inotify.cpp:248
#10 0x00007f6e3f506fcb in QThreadPrivate::start (arg=0x1caed00) at thread/qthread_unix.cpp:298
#11 0x00007f6e39221e9a in start_thread (arg=0x7f6e22fb4700) at pthread_create.c:308
#12 0x00007f6e428ba4bd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#13 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f6e225a7700 (LWP 20234)):
#0  0x00007f6e428aeb03 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f6e386baff6 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f6e386bb124 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6e3f635426 in QEventDispatcherGlib::processEvents (this=0x7f6e100008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#4  0x00007f6e3f604c82 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f6e3f604ed7 in QEventLoop::exec (this=0x7f6e225a6dd0, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007f6e3f503fa7 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:501
#7  0x00007f6e3f5e49ff in QInotifyFileSystemWatcherEngine::run (this=0x1aa9e80) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007f6e3f506fcb in QThreadPrivate::start (arg=0x1aa9e80) at thread/qthread_unix.cpp:298
#9  0x00007f6e39221e9a in start_thread (arg=0x7f6e225a7700) at pthread_create.c:308
#10 0x00007f6e428ba4bd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f6e42ff0780 (LWP 20232)):
[KCrash Handler]
#6  0x0000000000000000 in ?? ()
#7  0x00007f6e42bdae26 in MDWSlider::update (this=0x1d80720) at ../../kmix/gui/mdwslider.cpp:1001
#8  0x00007f6e42bd664b in ViewDockAreaPopup::refreshVolumeLevels (this=<optimized out>) at ../../kmix/gui/viewdockareapopup.cpp:168
#9  0x00007f6e3f61a281 in QMetaObject::activate (sender=0x1cbe0f0, m=<optimized out>, local_signal_index=<optimized out>, argv=0x0) at kernel/qobject.cpp:3547
#10 0x00007f6e3f61a281 in QMetaObject::activate (sender=0x1cc5a20, m=<optimized out>, local_signal_index=<optimized out>, argv=0x0) at kernel/qobject.cpp:3547
#11 0x00007f6e42bafb0c in Mixer_Backend::readSetFromHW (this=0x1cc5a20) at ../../kmix/backends/mixer_backend.cpp:155
#12 0x00007f6e42bbfdf5 in sink_cb (c=<optimized out>, i=<optimized out>, eol=<optimized out>) at ../../kmix/backends/mixer_pulse.cpp:191
#13 0x00007f6e40f97944 in ?? () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#14 0x00007f6e38bd9693 in ?? () from /usr/lib/x86_64-linux-gnu/libpulsecommon-1.1.so
#15 0x00007f6e38bd9a03 in pa_pdispatch_run () from /usr/lib/x86_64-linux-gnu/libpulsecommon-1.1.so
#16 0x00007f6e40f8dbdd in ?? () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#17 0x00007f6e38bde2a9 in ?? () from /usr/lib/x86_64-linux-gnu/libpulsecommon-1.1.so
#18 0x00007f6e40d7bab3 in ?? () from /usr/lib/x86_64-linux-gnu/libpulse-mainloop-glib.so.0
#19 0x00007f6e386bac9a in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#20 0x00007f6e386bb060 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#21 0x00007f6e386bb124 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#22 0x00007f6e3f6353bf in QEventDispatcherGlib::processEvents (this=0x18b6ad0, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#23 0x00007f6e4031fd5e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#24 0x00007f6e3f604c82 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#25 0x00007f6e3f604ed7 in QEventLoop::exec (this=0x7fff615f3650, flags=...) at kernel/qeventloop.cpp:204
#26 0x00007f6e3f609f67 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1148
#27 0x00007f6e42bc73e2 in kdemain (argc=1, argv=0x7fff615f3bd8) at ../../kmix/apps/main.cpp:76
#28 0x00007f6e427e976d in __libc_start_main (main=0x400630 <main(int, char**)>, argc=1, ubp_av=0x7fff615f3bd8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff615f3bc8) at libc-start.c:226
#29 0x0000000000400661 in _start ()

Possible duplicates by query: bug 299912, bug 299908, bug 299902, bug 299891, bug 299864.

Reported using DrKonqi