Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.3.4 (KDE 4.3.4)
Qt Version: 4.6.0
Operating System: Linux 2.6.32-trunk-amd64 x86_64
Distribution: Debian GNU/Linux unstable (sid)

What I was doing when the application crashed:
1) kdm
2) login to kde
3) plasma-desktop crashes
4) other functionality works (workspace effects, application starting, ...)

 -- Backtrace:
Application: Plasma-Arbeitsfläche (plasma-desktop), signal: Segmentation fault
The current source language is "auto; currently c".
[Current thread is 1 (Thread 0x7f92620d87a0 (LWP 7419))]

Thread 2 (Thread 0x7f9233fff910 (LWP 7422)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:261
#1  0x00007f925eb58de9 in QWaitConditionPrivate::wait (this=0x3b22380, mutex=0x3b22378, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:87
#2  QWaitCondition::wait (this=0x3b22380, mutex=0x3b22378, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:159
#3  0x00007f925b750f84 in QHostInfoAgent::run (this=0x3b22360) at kernel/qhostinfo.cpp:252
#4  0x00007f925eb57ef5 in QThreadPrivate::start (arg=0x3b22360) at thread/qthread_unix.cpp:244
#5  0x00007f92599d173a in start_thread (arg=<value optimized out>) at pthread_create.c:300
#6  0x00007f9261aef69d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#7  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f92620d87a0 (LWP 7419)):
[KCrash Handler]
#5  qNumVariantToHelper<double> (this=0x0, ok=0x0) at kernel/qvariant.cpp:2361
#6  QVariant::toDouble (this=0x0, ok=0x0) at kernel/qvariant.cpp:2475
#7  0x00007f92387fa1b8 in HalPower::brightness (this=<value optimized out>, device=<value optimized out>) at ../../../solid/hal/halpower.cpp:396
#8  0x00007f923eb6b034 in Solid::Control::PowerManager::brightness (device=<value optimized out>) at ../../../../libs/solid/control/powermanager.cpp:198
#9  0x00007f923d20f806 in Battery::initExtenderItem (this=0x30a5e30, item=0x3c48fb0) at ../../../../plasma/applets/battery/battery.cpp:406
#10 0x00007f92616de0e6 in Plasma::ExtenderPrivate::loadExtenderItems (this=0x3c3d7e0) at ../../plasma/extender.cpp:659
#11 0x00007f92616df19d in Extender (this=0x3b69080, applet=<value optimized out>) at ../../plasma/extender.cpp:114
#12 0x00007f92616a475d in Plasma::Applet::extender (this=0x30a5e30) at ../../plasma/applet.cpp:688
#13 0x00007f923d212e39 in Battery::init (this=0x30a5e30) at ../../../../plasma/applets/battery/battery.cpp:148
#14 0x00007f92616caa0a in Plasma::Corona::loadLayout (this=0x2681300, configName=<value optimized out>) at ../../plasma/corona.cpp:377
#15 0x00007f92616cbab2 in Plasma::Corona::initializeLayout (this=0x2681300, configName=...) at ../../plasma/corona.cpp:324
#16 0x00007f9261dcea36 in PlasmaApp::corona (this=0x25dde00) at ../../../../plasma/shells/desktop/plasmaapp.cpp:574
#17 0x00007f9261dced08 in PlasmaApp::setupDesktop (this=0x25dde00) at ../../../../plasma/shells/desktop/plasmaapp.cpp:252
#18 0x00007f9261dcef1c in PlasmaApp::qt_metacall (this=0x25dde00, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fffa6b66770) at ./plasmaapp.moc:115
#19 0x00007f925ec5f647 in QMetaObject::activate (sender=0x271c4e0, m=<value optimized out>, local_signal_index=<value optimized out>, argv=0x0) at kernel/qobject.cpp:3294
#20 0x00007f925ec662bf in QSingleShotTimer::timerEvent (this=0x271c4e0) at kernel/qtimer.cpp:308
#21 0x00007f925ec5ba53 in QObject::event (this=0x271c4e0, e=0x0) at kernel/qobject.cpp:1224
#22 0x00007f925f3db08d in QApplicationPrivate::notify_helper (this=0x25f9500, receiver=0x271c4e0, e=0x7fffa6b66ec0) at kernel/qapplication.cpp:4242
#23 0x00007f925f3e13bd in QApplication::notify (this=0x25dde00, receiver=0x271c4e0, e=0x7fffa6b66ec0) at kernel/qapplication.cpp:4125
#24 0x00007f9260576e06 in KApplication::notify (this=0x25dde00, receiver=0x271c4e0, event=0x7fffa6b66ec0) at ../../kdeui/kernel/kapplication.cpp:302
#25 0x00007f925ec4bbdc in QCoreApplication::notifyInternal (this=0x25dde00, receiver=0x271c4e0, event=0x7fffa6b66ec0) at kernel/qcoreapplication.cpp:704
#26 0x00007f925ec793e4 in QCoreApplication::sendEvent (this=0x25fcac0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#27 QTimerInfoList::activateTimers (this=0x25fcac0) at kernel/qeventdispatcher_unix.cpp:603
#28 0x00007f925ec75984 in timerSourceDispatch (source=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:184
#29 0x00007f925952813a in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#30 0x00007f925952b998 in ?? () from /lib/libglib-2.0.so.0
#31 0x00007f925952bb4c in g_main_context_iteration () from /lib/libglib-2.0.so.0
#32 0x00007f925ec7568c in QEventDispatcherGlib::processEvents (this=0x25c56a0, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:407
#33 0x00007f925f48b53f in QGuiEventDispatcherGlib::processEvents (this=0x0, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#34 0x00007f925ec4a4c2 in QEventLoop::processEvents (this=<value optimized out>, flags=...) at kernel/qeventloop.cpp:149
#35 0x00007f925ec4a894 in QEventLoop::exec (this=0x7fffa6b67170, flags=...) at kernel/qeventloop.cpp:201
#36 0x00007f925ec4cd46 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:981
#37 0x00007f9261db52af in kdemain (argc=<value optimized out>, argv=<value optimized out>) at ../../../../plasma/shells/desktop/main.cpp:50
#38 0x00007f9261a42abd in __libc_start_main (main=<value optimized out>, argc=<value optimized out>, ubp_av=<value optimized out>, init=<value optimized out>, fini=<value optimized out>, 
    rtld_fini=<value optimized out>, stack_end=0x7fffa6b67478) at libc-start.c:222
#39 0x0000000000400649 in _start ()
The current source language is "auto; currently asm".
The current source language is "auto; currently c".

Reported using DrKonqi