Application: plasma-desktop (0.4)
KDE Platform Version: 4.6.2 (4.6.2)
Qt Version: 4.7.2
Operating System: Linux 2.6.38-10-generic x86_64
Distribution: Ubuntu 11.04

-- Information about the crash:
after login blackscreen

The crash can be reproduced every time.

-- Backtrace:
Application: Plasma-Desktop-Umgebung (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f941afa17a0 (LWP 1747))]

Thread 5 (Thread 0x7f93f54b3700 (LWP 1874)):
#0  0x00007f941a895f03 in __poll (fds=<value optimized out>, nfds=<value optimized out>, timeout=<value optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f940f274104 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f940f274639 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f9417aa4446 in QEventDispatcherGlib::processEvents (this=0x37b0c00, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007f9417a78882 in QEventLoop::processEvents (this=<value optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f9417a78abc in QEventLoop::exec (this=0x7f93f54b2db0, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007f941798f924 in QThread::exec (this=<value optimized out>) at thread/qthread.cpp:492
#7  0x00007f9417a5ac2f in QInotifyFileSystemWatcherEngine::run (this=0x37a8e30) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007f9417992175 in QThreadPrivate::start (arg=0x37a8e30) at thread/qthread_unix.cpp:320
#9  0x00007f940fb77d8c in start_thread (arg=0x7f93f54b3700) at pthread_create.c:304
#10 0x00007f941a8a304d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 4 (Thread 0x7f93f2eff700 (LWP 1877)):
#0  0x00007f940fb7bd9d in __pthread_mutex_unlock_usercnt (mutex=0x3b78ad8) at pthread_mutex_unlock.c:52
#1  __pthread_mutex_unlock (mutex=0x3b78ad8) at pthread_mutex_unlock.c:290
#2  0x00007f940f273094 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f940f273f9d in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f940f274639 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f9417aa4446 in QEventDispatcherGlib::processEvents (this=0x3b80f00, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#6  0x00007f9417a78882 in QEventLoop::processEvents (this=<value optimized out>, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007f9417a78abc in QEventLoop::exec (this=0x7f93f2efedb0, flags=...) at kernel/qeventloop.cpp:201
#8  0x00007f941798f924 in QThread::exec (this=<value optimized out>) at thread/qthread.cpp:492
#9  0x00007f9417a5ac2f in QInotifyFileSystemWatcherEngine::run (this=0x3b66a60) at io/qfilesystemwatcher_inotify.cpp:248
#10 0x00007f9417992175 in QThreadPrivate::start (arg=0x3b66a60) at thread/qthread_unix.cpp:320
#11 0x00007f940fb77d8c in start_thread (arg=0x7f93f2eff700) at pthread_create.c:304
#12 0x00007f941a8a304d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#13 0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7f93eac72700 (LWP 1886)):
#0  0x00007f941a895f03 in __poll (fds=<value optimized out>, nfds=<value optimized out>, timeout=<value optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f940f274104 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f940f2749f2 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f93ebd89c44 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#4  0x00007f940f29b3e4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f940fb77d8c in start_thread (arg=0x7f93eac72700) at pthread_create.c:304
#6  0x00007f941a8a304d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#7  0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f93e9ba7700 (LWP 1887)):
#0  0x00007f940fb7bd9d in __pthread_mutex_unlock_usercnt (mutex=0x7f93ec038a98) at pthread_mutex_unlock.c:52
#1  __pthread_mutex_unlock (mutex=0x7f93ec038a98) at pthread_mutex_unlock.c:290
#2  0x00007f940f2740f8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f940f274639 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f9417aa4446 in QEventDispatcherGlib::processEvents (this=0x7f93ec033fc0, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#5  0x00007f9417a78882 in QEventLoop::processEvents (this=<value optimized out>, flags=...) at kernel/qeventloop.cpp:149
#6  0x00007f9417a78abc in QEventLoop::exec (this=0x7f93e9ba6db0, flags=...) at kernel/qeventloop.cpp:201
#7  0x00007f941798f924 in QThread::exec (this=<value optimized out>) at thread/qthread.cpp:492
#8  0x00007f9417a5ac2f in QInotifyFileSystemWatcherEngine::run (this=0x3f92570) at io/qfilesystemwatcher_inotify.cpp:248
#9  0x00007f9417992175 in QThreadPrivate::start (arg=0x3f92570) at thread/qthread_unix.cpp:320
#10 0x00007f940fb77d8c in start_thread (arg=0x7f93e9ba7700) at pthread_create.c:304
#11 0x00007f941a8a304d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#12 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f941afa17a0 (LWP 1747)):
[KCrash Handler]
#6  ref (this=0x2a3ccf0, other=...) at ../../include/QtCore/../../src/corelib/arch/qatomic_x86_64.h:121
#7  QString::operator= (this=0x2a3ccf0, other=...) at tools/qstring.cpp:1357
#8  0x00007f93fd87d028 in Marble::WorldClock::init (this=0x2a3cc70) at ../../../../marble/src/plasmoid/worldclock.cpp:119
#9  0x00007f941a3c4515 in Plasma::ContainmentPrivate::initApplets (this=0x2a1cc00) at ../../plasma/containment.cpp:463
#10 0x00007f941a3d7a5e in Plasma::CoronaPrivate::importLayout (this=0x22f9320, conf=<value optimized out>, mergeConfig=false) at ../../plasma/corona.cpp:1035
#11 0x00007f941a3d8613 in Plasma::Corona::loadLayout (this=0x2336990, configName=...) at ../../plasma/corona.cpp:278
#12 0x00007f941a3d86dc in Plasma::Corona::initializeLayout (this=0x2336990, configName=...) at ../../plasma/corona.cpp:181
#13 0x00007f941aba7ef3 in PlasmaApp::corona (this=0x2218310) at ../../../../plasma/desktop/shell/plasmaapp.cpp:797
#14 0x00007f941aba81ef in PlasmaApp::setupDesktop (this=0x2218310) at ../../../../plasma/desktop/shell/plasmaapp.cpp:299
#15 0x00007f941aba9a10 in PlasmaApp::qt_metacall (this=0x2218310, _c=QMetaObject::InvokeMetaMethod, _id=18, _a=0x230ed00) at ./plasmaapp.moc:155
#16 0x00007f9417a8d49a in QObject::event (this=0x2218310, e=<value optimized out>) at kernel/qobject.cpp:1226
#17 0x00007f9416e38fb4 in QApplication::event (this=0x2218310, e=0x2304b40) at kernel/qapplication.cpp:2503
#18 0x00007f9416e369f4 in QApplicationPrivate::notify_helper (this=0x2226bd0, receiver=0x2218310, e=0x2304b40) at kernel/qapplication.cpp:4462
#19 0x00007f9416e3b3ba in QApplication::notify (this=<value optimized out>, receiver=0x2218310, e=0x2304b40) at kernel/qapplication.cpp:4341
#20 0x00007f9418731866 in KApplication::notify (this=0x2218310, receiver=0x2218310, event=0x2304b40) at ../../kdeui/kernel/kapplication.cpp:311
#21 0x00007f9417a7949c in QCoreApplication::notifyInternal (this=0x2218310, receiver=0x2218310, event=0x2304b40) at kernel/qcoreapplication.cpp:731
#22 0x00007f9417a7cc25 in sendEvent (receiver=0x0, event_type=0, data=0x21a0b60) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#23 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x21a0b60) at kernel/qcoreapplication.cpp:1372
#24 0x00007f9417aa4253 in sendPostedEvents (s=0x22295c0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:220
#25 postEventSourceDispatch (s=0x22295c0) at kernel/qeventdispatcher_glib.cpp:277
#26 0x00007f940f273bcd in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#27 0x00007f940f2743a8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#28 0x00007f940f274639 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#29 0x00007f9417aa43ef in QEventDispatcherGlib::processEvents (this=0x21a0340, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:422
#30 0x00007f9416ee04de in QGuiEventDispatcherGlib::processEvents (this=<value optimized out>, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#31 0x00007f9417a78882 in QEventLoop::processEvents (this=<value optimized out>, flags=...) at kernel/qeventloop.cpp:149
#32 0x00007f9417a78abc in QEventLoop::exec (this=0x7fff42291110, flags=...) at kernel/qeventloop.cpp:201
#33 0x00007f9417a7cecb in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1008
#34 0x00007f941ab8f897 in kdemain (argc=1, argv=0x7fff422914d8) at ../../../../plasma/desktop/shell/main.cpp:118
#35 0x00007f941a7dbeff in __libc_start_main (main=0x400740 <main(int, char**)>, argc=1, ubp_av=0x7fff422914d8, init=<value optimized out>, fini=<value optimized out>, rtld_fini=<value optimized out>, stack_end=0x7fff422914c8) at libc-start.c:226
#36 0x0000000000400669 in _start ()

Possible duplicates by query: bug 274855, bug 255715, bug 248463.

Reported using DrKonqi