Application: plasma-desktop (0.4)
KDE Platform Version: 4.8.4 (4.8.4)
Qt Version: 4.8.1
Operating System: Linux 3.2.0-27-generic x86_64
Distribution: Ubuntu 12.04 LTS

-- Information about the crash:
- What I was doing when the application crashed:

Nothing , it crashes directly during the startup repeatedly, sometimes it restarts after crashing, especially when making logout and login again.

The crash can be reproduced every time.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fcde188b780 (LWP 1823))]

Thread 5 (Thread 0x7fcdc06ea700 (LWP 1826)):
#0  0x00007fcdd53475e8 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fcdd530b98b in g_main_context_query () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fcdd530bfaa in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fcdd530c164 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fcdde32f426 in QEventDispatcherGlib::processEvents (this=0x7fcdb80008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#5  0x00007fcdde2fec82 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#6  0x00007fcdde2feed7 in QEventLoop::exec (this=0x7fcdc06e9dd0, flags=...) at kernel/qeventloop.cpp:204
#7  0x00007fcdde1fdfa7 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:501
#8  0x00007fcdde2de9ff in QInotifyFileSystemWatcherEngine::run (this=0x272fb80) at io/qfilesystemwatcher_inotify.cpp:248
#9  0x00007fcdde200fcb in QThreadPrivate::start (arg=0x272fb80) at thread/qthread_unix.cpp:298
#10 0x00007fcdd5c10e9a in start_thread (arg=0x7fcdc06ea700) at pthread_create.c:308
#11 0x00007fcde11694bd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#12 0x0000000000000000 in ?? ()

Thread 4 (Thread 0x7fcdb2280700 (LWP 1888)):
#0  0x00007fcde115db03 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007fcdd530c036 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fcdd530c164 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fcdde32f426 in QEventDispatcherGlib::processEvents (this=0x7fcda40008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#4  0x00007fcdde2fec82 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007fcdde2feed7 in QEventLoop::exec (this=0x7fcdb227fdd0, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007fcdde1fdfa7 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:501
#7  0x00007fcdde2de9ff in QInotifyFileSystemWatcherEngine::run (this=0x391de40) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007fcdde200fcb in QThreadPrivate::start (arg=0x391de40) at thread/qthread_unix.cpp:298
#9  0x00007fcdd5c10e9a in start_thread (arg=0x7fcdb2280700) at pthread_create.c:308
#10 0x00007fcde11694bd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7fcda9b10700 (LWP 1891)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007fcddb0e3222 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#2  0x00007fcddb0e3259 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#3  0x00007fcdd5c10e9a in start_thread (arg=0x7fcda9b10700) at pthread_create.c:308
#4  0x00007fcde11694bd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#5  0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7fcda0cff700 (LWP 1916)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007fcdde2014db in wait (time=18446744073709551615, this=0x49d5170) at thread/qwaitcondition_unix.cpp:86
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x28e9a10, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:158
#3  0x00007fcdbda93372 in meth_QWaitCondition_wait (sipSelf=<QWaitCondition at remote 0x32537c0>, sipArgs=(<QMutex at remote 0x3253590>,), sipKwds=<optimized out>) at sipQtCorepart1.cpp:6650
#4  0x00007fcdbe6e7845 in PyEval_EvalFrameEx () from /usr/lib/libpython2.7.so.1.0
#5  0x00007fcdbe6b2605 in PyEval_EvalCodeEx () from /usr/lib/libpython2.7.so.1.0
#6  0x00007fcdbe6b27bd in function_call () from /usr/lib/libpython2.7.so.1.0
#7  0x00007fcdbe796e83 in PyObject_Call () from /usr/lib/libpython2.7.so.1.0
#8  0x00007fcdbe77b1cf in instancemethod_call.8746 () from /usr/lib/libpython2.7.so.1.0
#9  0x00007fcdbe796e83 in PyObject_Call () from /usr/lib/libpython2.7.so.1.0
#10 0x00007fcdbe7977d7 in PyEval_CallObjectWithKeywords () from /usr/lib/libpython2.7.so.1.0
#11 0x00007fcdbd7d7972 in sip_api_call_method (isErr=0x0, method=<instancemethod at remote 0x2dc5640>, fmt=0x7fcdbdb80eb3 "") at /build/buildd/sip4-4.13.2/siplib/siplib.c:1751
#12 0x00007fcdbda7ad50 in sipVH_QtCore_11 (sipGILState=PyGILState_UNLOCKED, sipMethod=<instancemethod at remote 0x2dc5640>) at sipQtCorepart0.cpp:4452
#13 0x00007fcdbdab078f in sipQThread::run (this=0x49df790) at sipQtCorepart2.cpp:2900
#14 0x00007fcdde200fcb in QThreadPrivate::start (arg=0x49df790) at thread/qthread_unix.cpp:298
#15 0x00007fcdd5c10e9a in start_thread (arg=0x7fcda0cff700) at pthread_create.c:308
#16 0x00007fcde11694bd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#17 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7fcde188b780 (LWP 1823)):
[KCrash Handler]
#6  0x00007fcdbe7363dc in PyErr_Restore () from /usr/lib/libpython2.7.so.1.0
#7  0x00007fcdbd7d4141 in sip_api_pyslot_extend (mod=0x7fcdbdde0550, st=eq_slot, td=0x7fcdbddf67c0, arg0=<QSize at remote 0x4c882f0>, arg1=None) at /build/buildd/sip4-4.13.2/siplib/siplib.c:1732
#8  0x00007fcdbdab86ec in slot_QSize___eq__ (sipSelf=<QSize at remote 0x4c882f0>, sipArg=None) at sipQtCorepart3.cpp:10811
#9  0x00007fcdbe73b84a in try_rich_compare.20302 () from /usr/lib/libpython2.7.so.1.0
#10 0x00007fcdbe7abff1 in PyObject_RichCompare () from /usr/lib/libpython2.7.so.1.0
#11 0x00007fcdbe6e44c8 in PyEval_EvalFrameEx () from /usr/lib/libpython2.7.so.1.0
#12 0x00007fcdbe6b2605 in PyEval_EvalCodeEx () from /usr/lib/libpython2.7.so.1.0
#13 0x00007fcdbe6b27bd in function_call () from /usr/lib/libpython2.7.so.1.0
#14 0x00007fcdbe796e83 in PyObject_Call () from /usr/lib/libpython2.7.so.1.0
#15 0x00007fcdbe77b1cf in instancemethod_call.8746 () from /usr/lib/libpython2.7.so.1.0
#16 0x00007fcdbe796e83 in PyObject_Call () from /usr/lib/libpython2.7.so.1.0
#17 0x00007fcdbe7977d7 in PyEval_CallObjectWithKeywords () from /usr/lib/libpython2.7.so.1.0
#18 0x00007fcdbd7dff80 in sip_api_invoke_slot (slot=<optimized out>, sigargs=()) at /build/buildd/sip4-4.13.2/siplib/qtlib.c:203
#19 0x00007fcdbdb67396 in PyQtProxy::invokeSlot(qpycore_slot const&, void**) () from /usr/lib/python2.7/dist-packages/PyQt4/QtCore.so
#20 0x00007fcdbdb67690 in PyQtProxy::unislot(void**) () from /usr/lib/python2.7/dist-packages/PyQt4/QtCore.so
#21 0x00007fcdbdb67772 in PyQtProxy::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/python2.7/dist-packages/PyQt4/QtCore.so
#22 0x00007fcdde314489 in QMetaObject::activate (sender=0x471f940, m=<optimized out>, local_signal_index=<optimized out>, argv=0x0) at kernel/qobject.cpp:3566
#23 0x00007fcdbdab0f5f in sipQTimer::timerEvent (this=0x471f940, a0=0x7fff09e94970) at sipQtCorepart2.cpp:148
#24 0x00007fcdde319179 in QObject::event (this=0x471f940, e=<optimized out>) at kernel/qobject.cpp:1157
#25 0x00007fcdbdab1e5d in event (a0=0x7fff09e94970, this=0x471f940) at sipQtCorepart2.cpp:165
#26 sipQTimer::event (this=0x471f940, a0=0x7fff09e94970) at sipQtCorepart2.cpp:157
#27 0x00007fcddd682894 in notify_helper (e=0x7fff09e94970, receiver=0x471f940, this=0x2648d30) at kernel/qapplication.cpp:4559
#28 QApplicationPrivate::notify_helper (this=0x2648d30, receiver=0x471f940, e=0x7fff09e94970) at kernel/qapplication.cpp:4531
#29 0x00007fcddd687713 in QApplication::notify (this=0x2633ff0, receiver=0x471f940, e=0x7fff09e94970) at kernel/qapplication.cpp:4420
#30 0x00007fcddefe39e6 in KApplication::notify (this=0x2633ff0, receiver=0x471f940, event=0x7fff09e94970) at ../../kdeui/kernel/kapplication.cpp:311
#31 0x00007fcdde2ffe9c in QCoreApplication::notifyInternal (this=0x2633ff0, receiver=0x471f940, event=0x7fff09e94970) at kernel/qcoreapplication.cpp:876
#32 0x00007fcdde3311f2 in sendEvent (event=0x7fff09e94970, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#33 QTimerInfoList::activateTimers (this=0x264d6b0) at kernel/qeventdispatcher_unix.cpp:611
#34 0x00007fcdde32ec0d in timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:186
#35 timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:180
#36 0x00007fcdd530bd53 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#37 0x00007fcdd530c0a0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#38 0x00007fcdd530c164 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#39 0x00007fcdde32f3bf in QEventDispatcherGlib::processEvents (this=0x25d6ad0, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#40 0x00007fcddd72ad5e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#41 0x00007fcdde2fec82 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#42 0x00007fcdde2feed7 in QEventLoop::exec (this=0x7fff09e94bd0, flags=...) at kernel/qeventloop.cpp:204
#43 0x00007fcdde303f67 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1148
#44 0x00007fcde1475a13 in kdemain (argc=1, argv=0x7fff09e94fb8) at ../../../../plasma/desktop/shell/main.cpp:120
#45 0x00007fcde109876d in __libc_start_main (main=0x400640 <main(int, char**)>, argc=1, ubp_av=0x7fff09e94fb8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff09e94fa8) at libc-start.c:226
#46 0x0000000000400671 in _start ()

Reported using DrKonqi