Application: plasma-desktop (0.4)
KDE Platform Version: 4.7.2 (4.7.2)
Qt Version: 4.7.4
Operating System: Linux 3.0.0-13-generic x86_64
Distribution: Ubuntu 11.10

-- Information about the crash:
- What I was doing when the application crashed:
Using ATI Catalyst Control Center, changed from dual head to single head set up.
Using Lenovo T61 laptop in a docking station, with two Samsung monitors attached.
Did a restart after changing from two Samsung monitors to one.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0x7fbe005017a0 (LWP 2121))]

Thread 4 (Thread 0x7fbddda35700 (LWP 2123)):
#0  0x00007fbdf4e78034 in __pthread_mutex_lock (mutex=0x2a00d28) at pthread_mutex_lock.c:61
#1  0x00007fbdf4368fcc in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fbdf4369429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fbdfcfcff3e in QEventDispatcherGlib::processEvents (this=0x29f0f40, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007fbdfcfa3cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007fbdfcfa3ef7 in QEventLoop::exec (this=0x7fbddda34db0, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007fbdfcebb27f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#7  0x00007fbdfcf86cbf in QInotifyFileSystemWatcherEngine::run (this=0x29f0d40) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007fbdfcebdd05 in QThreadPrivate::start (arg=0x29f0d40) at thread/qthread_unix.cpp:331
#9  0x00007fbdf4e75efc in start_thread (arg=0x7fbddda35700) at pthread_create.c:304
#10 0x00007fbdffde989d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7fbdd6d60700 (LWP 2124)):
#0  0xffffffffff60017b in ?? ()
#1  0x00007fbdd6d5fad0 in ?? ()
#2  0x00007fff489ff7e7 in ?? ()
Backtrace stopped: previous frame identical to this frame (corrupt stack?)

Thread 2 (Thread 0x7fbdd1330700 (LWP 2132)):
#0  0x00007fbdffddd773 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007fbdf4368f68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fbdf4369792 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fbdd1e0e516 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#4  0x00007fbdf438e2b6 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fbdf4e75efc in start_thread (arg=0x7fbdd1330700) at pthread_create.c:304
#6  0x00007fbdffde989d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#7  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7fbe005017a0 (LWP 2121)):
[KCrash Handler]
#6  0x000000000203fd48 in ?? ()
#7  0x00007fbde7043b96 in TaskGroupItem::~TaskGroupItem (this=0x4c7b6a0, __in_chrg=<optimized out>) at ../../../../../plasma/desktop/applets/tasks/taskgroupitem.cpp:82
#8  0x00007fbde7043c49 in TaskGroupItem::~TaskGroupItem (this=0x4c7b6a0, __in_chrg=<optimized out>) at ../../../../../plasma/desktop/applets/tasks/taskgroupitem.cpp:83
#9  0x00007fbdfcfbba88 in QObject::event (this=0x4c7b6a0, e=<optimized out>) at kernel/qobject.cpp:1200
#10 0x00007fbdfc97389b in QGraphicsWidget::event (this=0x4c7b6a0, event=0x4777da0) at graphicsview/qgraphicswidget.cpp:1455
#11 0x00007fbdfc355424 in notify_helper (e=0x4777da0, receiver=0x4c7b6a0, this=0x1eb42d0) at kernel/qapplication.cpp:4486
#12 QApplicationPrivate::notify_helper (this=0x1eb42d0, receiver=0x4c7b6a0, e=0x4777da0) at kernel/qapplication.cpp:4458
#13 0x00007fbdfc35a291 in QApplication::notify (this=0x1ea5c00, receiver=0x4c7b6a0, e=0x4777da0) at kernel/qapplication.cpp:4365
#14 0x00007fbdfdc53126 in KApplication::notify (this=0x1ea5c00, receiver=0x4c7b6a0, event=0x4777da0) at ../../kdeui/kernel/kapplication.cpp:311
#15 0x00007fbdfcfa4afc in QCoreApplication::notifyInternal (this=0x1ea5c00, receiver=0x4c7b6a0, event=0x4777da0) at kernel/qcoreapplication.cpp:787
#16 0x00007fbdfcfa851f in sendEvent (event=0x4777da0, receiver=0x4c7b6a0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#17 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=52, data=0x1e46430) at kernel/qcoreapplication.cpp:1428
#18 0x00007fbdfcfa87c4 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1071
#19 0x00007fbe000e81a3 in kdemain (argc=1, argv=0x7fff489d3088) at ../../../../plasma/desktop/shell/main.cpp:120
#20 0x00007fbdffd2930d in __libc_start_main (main=0x400640 <main(int, char**)>, argc=1, ubp_av=0x7fff489d3088, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff489d3078) at libc-start.c:226
#21 0x0000000000400671 in _start ()

Possible duplicates by query: bug 287205, bug 287047, bug 287045, bug 287010, bug 287006.

Reported using DrKonqi