Application: plasma-desktop (4.10.4)
KDE Platform Version: 4.10.4
Qt Version: 4.8.4
Operating System: Linux 3.8.0-25-generic x86_64
Distribution: Ubuntu 13.04

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

Logging out of KDE, after a recent software update

- Unusual behavior I noticed:

Error report and black screen

-- 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 0x7f1947c5d7c0 (LWP 4832))]

Thread 6 (Thread 0x7f192761f700 (LWP 4833)):
#0  0x00007f1947518d3d in nanosleep () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f1947518be1 in __sleep (seconds=0) at ../sysdeps/unix/sysv/linux/sleep.c:137
#2  0x00007f1940994e22 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#3  0x00007f1940994ea9 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#4  0x00007f1938129764 in ?? () from /usr/lib/nvidia-304/libGL.so.1
#5  0x00007f193b08ff8e in start_thread (arg=0x7f192761f700) at pthread_create.c:311
#6  0x00007f1947551e1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 5 (Thread 0x7f191b3e7700 (LWP 4835)):
#0  __pthread_mutex_unlock_usercnt (mutex=0x7f191400d360, decr=1) at pthread_mutex_unlock.c:69
#1  0x00007f193a9cc5f1 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f193a98cd1a in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f193a98d175 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f193a98d6ba in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f191d2ac4f6 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#6  0x00007f193a9b0eb5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007f1938129764 in ?? () from /usr/lib/nvidia-304/libGL.so.1
#8  0x00007f193b08ff8e in start_thread (arg=0x7f191b3e7700) at pthread_create.c:311
#9  0x00007f1947551e1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 4 (Thread 0x7f190bfff700 (LWP 4839)):
#0  0x00007f19475453cd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f193a98d1dc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f193a98d304 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f1944131036 in QEventDispatcherGlib::processEvents (this=0x7f19040008f0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#4  0x00007f194410138f in QEventLoop::processEvents (this=this@entry=0x7f190bffecd0, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f1944101618 in QEventLoop::exec (this=this@entry=0x7f190bffecd0, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007f1944003410 in QThread::exec (this=this@entry=0x2b479a0) at thread/qthread.cpp:542
#7  0x00007f19440e2edf in QInotifyFileSystemWatcherEngine::run (this=0x2b479a0) at io/qfilesystemwatcher_inotify.cpp:256
#8  0x00007f1944005bec in QThreadPrivate::start (arg=0x2b479a0) at thread/qthread_unix.cpp:338
#9  0x00007f1938129764 in ?? () from /usr/lib/nvidia-304/libGL.so.1
#10 0x00007f193b08ff8e in start_thread (arg=0x7f190bfff700) at pthread_create.c:311
#11 0x00007f1947551e1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 3 (Thread 0x7f190b7fe700 (LWP 4840)):
#0  0x00007f19475453cd in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f193a98d1dc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f193a98d304 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f1944131036 in QEventDispatcherGlib::processEvents (this=0x7f18fc0008f0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#4  0x00007f194410138f in QEventLoop::processEvents (this=this@entry=0x7f190b7fdcd0, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f1944101618 in QEventLoop::exec (this=this@entry=0x7f190b7fdcd0, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007f1944003410 in QThread::exec (this=this@entry=0x2f87cf0) at thread/qthread.cpp:542
#7  0x00007f19440e2edf in QInotifyFileSystemWatcherEngine::run (this=0x2f87cf0) at io/qfilesystemwatcher_inotify.cpp:256
#8  0x00007f1944005bec in QThreadPrivate::start (arg=0x2f87cf0) at thread/qthread_unix.cpp:338
#9  0x00007f1938129764 in ?? () from /usr/lib/nvidia-304/libGL.so.1
#10 0x00007f193b08ff8e in start_thread (arg=0x7f190b7fe700) at pthread_create.c:311
#11 0x00007f1947551e1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 2 (Thread 0x7f1902f1f700 (LWP 4849)):
#0  0x00007f193a9cc35c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f193a9cc5b9 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f193a98c90b in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f193a98d0fe in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f193a98d304 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f1944131036 in QEventDispatcherGlib::processEvents (this=0x7f18f80008f0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#6  0x00007f194410138f in QEventLoop::processEvents (this=this@entry=0x7f1902f1ecc0, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007f1944101618 in QEventLoop::exec (this=this@entry=0x7f1902f1ecc0, flags=...) at kernel/qeventloop.cpp:204
#8  0x00007f1944003410 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:542
#9  0x00007f1908fa96e5 in KCupsConnection::run() () from /usr/lib/libkcupslib.so
#10 0x00007f1944005bec in QThreadPrivate::start (arg=0x36c6960) at thread/qthread_unix.cpp:338
#11 0x00007f1938129764 in ?? () from /usr/lib/nvidia-304/libGL.so.1
#12 0x00007f193b08ff8e in start_thread (arg=0x7f1902f1f700) at pthread_create.c:311
#13 0x00007f1947551e1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 1 (Thread 0x7f1947c5d7c0 (LWP 4832)):
[KCrash Handler]
#6  0x00007f1945cfd944 in QDeclarativeItem::~QDeclarativeItem (this=0x2d5ae00, __in_chrg=<optimized out>) at graphicsitems/qdeclarativeitem.cpp:1668
#7  0x00007f1945cc210e in ~QDeclarativeElement (this=0x2d5ae00, __in_chrg=<optimized out>) at ../../include/QtDeclarative/../../src/declarative/qml/qdeclarativeprivate.h:87
#8  QDeclarativePrivate::QDeclarativeElement<QDeclarativeItem>::~QDeclarativeElement (this=0x2d5ae00, __in_chrg=<optimized out>) at ../../include/QtDeclarative/../../src/declarative/qml/qdeclarativeprivate.h:87
#9  0x00007f194411c5e8 in QObject::event (this=0x2d5ae00, e=<optimized out>) at kernel/qobject.cpp:1175
#10 0x00007f19434a88ec in QApplicationPrivate::notify_helper (this=this@entry=0x1eeea60, receiver=receiver@entry=0x2d5ae00, e=e@entry=0x36a1a80) at kernel/qapplication.cpp:4567
#11 0x00007f19434ab25b in QApplication::notify (this=this@entry=0x1e8a7c0, receiver=receiver@entry=0x2d5ae00, e=e@entry=0x36a1a80) at kernel/qapplication.cpp:4428
#12 0x00007f1944dc6af6 in KApplication::notify (this=0x1e8a7c0, receiver=0x2d5ae00, event=0x36a1a80) at ../../kdeui/kernel/kapplication.cpp:311
#13 0x00007f194410263e in QCoreApplication::notifyInternal (this=0x1e8a7c0, receiver=receiver@entry=0x2d5ae00, event=event@entry=0x36a1a80) at kernel/qcoreapplication.cpp:946
#14 0x00007f1944106171 in sendEvent (event=0x36a1a80, receiver=0x2d5ae00) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#15 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=52, data=0x1dc81f0) at kernel/qcoreapplication.cpp:1570
#16 0x00007f19441064a3 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=52) at kernel/qcoreapplication.cpp:1463
#17 0x00007f1944106d2d in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1225
#18 0x00007f194785d46b in kdemain () from /usr/lib/kde4/libkdeinit/libkdeinit4_plasma-desktop.so
#19 0x00007f1947479ea5 in __libc_start_main (main=0x4006e0, argc=1, ubp_av=0x7fffce7e1068, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffce7e1058) at libc-start.c:260
#20 0x0000000000400711 in _start ()

This bug may be a duplicate of or related to bug 321861.

Possible duplicates by query: bug 321861, bug 320582, bug 320469, bug 319473, bug 319189.

Reported using DrKonqi