Version:            (using KDE 4.1.2)
OS:                Linux
Installed from:    Ubuntu Packages

v$ kmix
kmix(9754) Mixer::setGlobalMaster: Mixer::setGlobalMaster() card= "ALSA::HDA_Intel:1" control= "PCM:0"
kmix(9754) Mixer::openIfValid: Mixer::open() detected master:  "PCM:0"
alan@alan-desktop:~/Documents/bootup/src/udev$ kmix(9754) Mixer::openIfValid: Mixer::open() detected master:  "PCM:0"
ASSERT: "dev->backendObject()==0" in file /build/buildd/kde4libs-4.1.2/solid/solid/devicemanager.cpp, line 164
KCrash: crashing... crashRecursionCounter = 2
KCrash: Application Name = kmix path = <unknown> pid = 9754
sock_file=/home/alan/.kde4/socket-alan-desktop/kdeinit4__0

Application: KMix (kmix), signal SIGABRT
(no debugging symbols found)
...
[Thread debugging using libthread_db enabled]
[New Thread 0x7f943960f7a0 (LWP 9754)]
[KCrash handler]
#5  0x00007f9438e9e095 in raise () from /lib/libc.so.6
#6  0x00007f9438e9faf0 in abort () from /lib/libc.so.6
#7  0x00007f9437bbf055 in qt_message_output () from /usr/lib/libQtCore.so.4
#8  0x00007f9437bbf19d in qFatal () from /usr/lib/libQtCore.so.4
#9  0x00007f94383f0049 in ?? () from /usr/lib/kde4/lib/libsolid.so.4
#10 0x00007f94383f013f in ?? () from /usr/lib/kde4/lib/libsolid.so.4
#11 0x00007f9437cbc8b6 in QMetaObject::activate ()
   from /usr/lib/libQtCore.so.4
#12 0x00007f94383feab2 in ?? () from /usr/lib/kde4/lib/libsolid.so.4
#13 0x00007f9438416071 in ?? () from /usr/lib/kde4/lib/libsolid.so.4
#14 0x00007f9437911243 in ?? () from /usr/lib/libQtDBus.so.4
#15 0x00007f94379196ff in ?? () from /usr/lib/libQtDBus.so.4
#16 0x00007f9437cb7497 in QObject::event () from /usr/lib/libQtCore.so.4
#17 0x00007f9436d05acf in QApplicationPrivate::notify_helper ()
   from /usr/lib/libQtGui.so.4
#18 0x00007f9436d07c85 in QApplication::notify () from /usr/lib/libQtGui.so.4
#19 0x00007f9438a911f1 in KApplication::notify ()
   from /usr/lib/kde4/lib/libkdeui.so.5
#20 0x00007f9437ca86b9 in QCoreApplication::notifyInternal ()
   from /usr/lib/libQtCore.so.4
#21 0x00007f9437ca99db in QCoreApplicationPrivate::sendPostedEvents ()
   from /usr/lib/libQtCore.so.4
#22 0x00007f9437cd16e3 in ?? () from /usr/lib/libQtCore.so.4
#23 0x00007f94343753d4 in IA__g_main_context_dispatch (context=0x626c80)
    at /build/buildd/glib2.0-2.16.4/glib/gmain.c:2012
#24 0x00007f94343786e5 in g_main_context_iterate (context=0x626c80, block=1, 
    dispatch=1, self=<value optimized out>)
    at /build/buildd/glib2.0-2.16.4/glib/gmain.c:2645
#25 0x00007f9434378bcb in IA__g_main_context_iteration (context=0x626c80, 
    may_block=1) at /build/buildd/glib2.0-2.16.4/glib/gmain.c:2708
#26 0x00007f9437cd19df in QEventDispatcherGlib::processEvents ()
   from /usr/lib/libQtCore.so.4
#27 0x00007f9436d8f20f in ?? () from /usr/lib/libQtGui.so.4
#28 0x00007f9437ca7b35 in QEventLoop::processEvents ()
   from /usr/lib/libQtCore.so.4
#29 0x00007f9437ca7c8b in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#30 0x00007f9437ca9cd9 in QCoreApplication::exec ()
   from /usr/lib/libQtCore.so.4
#31 0x00007f94391f24df in kdemain ()
   from /usr/lib/kde4/lib/libkdeinit4_kmix.so
#32 0x00007f9438e8a1c4 in __libc_start_main () from /lib/libc.so.6
#33 0x0000000000400649 in _start ()
#0  0x00007f9438f09b50 in __nanosleep_nocancel () from /lib/libc.so.6