Application: plasma-desktop (0.4)
KDE Platform Version: 4.7.3 (4.7.3)
Qt Version: 4.7.4
Operating System: Linux 3.0.0-14-generic x86_64
Distribution: Ubuntu 11.10

-- Information about the crash:
- What I was doing when the application crashed:
I was launching the Eclipse IDE. Installed from eclipse-SDK-3.7.1-linux-gtk-x86_64.tar.gz.

The system was Installed last month from Ubuntu 11.10 ISO file. Running a Samsung NP-R560-AS02PL laptop.

- Unusual behavior I noticed:
Plasma crashes every now and then - when working on Twinview, on a single monitor. In pidgin, sometimes just when clicking the border of the screen, sometimes when using yakuake. When it crashes and the panels, i usually see the Ubuntu purple wallpaper underneath (?).

Not sure if it's related, but flash video usually freezes the whole KDE UI - need to kill the plugin-container in order to restore normal behaviour.

The crash can be reproduced some of the time.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f3d5686c7c0 (LWP 9097))]

Thread 3 (Thread 0x7f3d33537700 (LWP 9098)):
#0  0x00007f3d56143773 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f3d4a6cdf68 in g_main_context_poll (n_fds=1, fds=0x7f3d2c0012c0, timeout=-1, context=0x2398e50, priority=<optimized out>) at /build/buildd/glib2.0-2.30.0/./glib/gmain.c:3402
#2  g_main_context_iterate (context=0x2398e50, block=<optimized out>, dispatch=1, self=<optimized out>) at /build/buildd/glib2.0-2.30.0/./glib/gmain.c:3084
#3  0x00007f3d4a6ce429 in g_main_context_iteration (context=0x2398e50, may_block=1) at /build/buildd/glib2.0-2.30.0/./glib/gmain.c:3152
#4  0x00007f3d53334f3e in QEventDispatcherGlib::processEvents (this=0x2398490, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#5  0x00007f3d53308cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#6  0x00007f3d53308ef7 in QEventLoop::exec (this=0x7f3d33536cd0, flags=...) at kernel/qeventloop.cpp:201
#7  0x00007f3d5322027f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#8  0x00007f3d532ebcbf in QInotifyFileSystemWatcherEngine::run (this=0x2396d10) at io/qfilesystemwatcher_inotify.cpp:248
#9  0x00007f3d53222d05 in QThreadPrivate::start (arg=0x2396d10) at thread/qthread_unix.cpp:331
#10 0x00007f3d479e756c in ?? () from /usr/lib/nvidia-current/libGL.so.1
#11 0x00007f3d4b1daefc in start_thread (arg=0x7f3d33537700) at pthread_create.c:304
#12 0x00007f3d5614f89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#13 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f3d2afbf700 (LWP 9104)):
#0  0x00007f3d53335314 in timerSourceCheckHelper (src=0x2951e20) at kernel/qeventdispatcher_glib.cpp:145
#1  0x00007f3d4a6cd734 in g_main_context_check (context=0x2952710, max_priority=2147483647, fds=<optimized out>, n_fds=<optimized out>) at /build/buildd/glib2.0-2.30.0/./glib/gmain.c:2959
#2  0x00007f3d4a6cdf82 in g_main_context_iterate (context=0x2952710, block=<optimized out>, dispatch=1, self=<optimized out>) at /build/buildd/glib2.0-2.30.0/./glib/gmain.c:3086
#3  0x00007f3d4a6ce429 in g_main_context_iteration (context=0x2952710, may_block=1) at /build/buildd/glib2.0-2.30.0/./glib/gmain.c:3152
#4  0x00007f3d53334f3e in QEventDispatcherGlib::processEvents (this=0x2951850, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#5  0x00007f3d53308cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#6  0x00007f3d53308ef7 in QEventLoop::exec (this=0x7f3d2afbecd0, flags=...) at kernel/qeventloop.cpp:201
#7  0x00007f3d5322027f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#8  0x00007f3d532ebcbf in QInotifyFileSystemWatcherEngine::run (this=0x29082e0) at io/qfilesystemwatcher_inotify.cpp:248
#9  0x00007f3d53222d05 in QThreadPrivate::start (arg=0x29082e0) at thread/qthread_unix.cpp:331
#10 0x00007f3d479e756c in ?? () from /usr/lib/nvidia-current/libGL.so.1
#11 0x00007f3d4b1daefc in start_thread (arg=0x7f3d2afbf700) at pthread_create.c:304
#12 0x00007f3d5614f89d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#13 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f3d5686c7c0 (LWP 9097)):
[KCrash Handler]
#6  isNull (this=0x190000041a) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:568
#7  operator! (this=0x190000041a) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:574
#8  TaskManager::TaskItem::task (this=0x25acfd0) at ../../../libs/taskmanager/taskitem.cpp:113
#9  0x00007f3d3b168068 in WindowTaskItem::publishIconGeometry (this=0x2946260, rect=...) at ../../../../../plasma/desktop/applets/tasks/windowtaskitem.cpp:130
#10 0x00007f3d3b177d24 in TaskGroupItem::publishIconGeometry (this=<optimized out>, rect=...) at ../../../../../plasma/desktop/applets/tasks/taskgroupitem.cpp:1432
#11 0x00007f3d3b177aa5 in publishIconGeometry (this=0x351fa60) at ../../../../../plasma/desktop/applets/tasks/taskgroupitem.cpp:1424
#12 TaskGroupItem::publishIconGeometry (this=<optimized out>) at ../../../../../plasma/desktop/applets/tasks/taskgroupitem.cpp:1416
#13 0x00007f3d3b176b7c in AbstractTaskItem::timerEvent (this=0x351fa60, event=<optimized out>) at ../../../../../plasma/desktop/applets/tasks/abstracttaskitem.cpp:439
#14 0x00007f3d53320789 in QObject::event (this=0x351fa60, e=<optimized out>) at kernel/qobject.cpp:1181
#15 0x00007f3d52cd889b in QGraphicsWidget::event (this=0x351fa60, event=0x7fffbed60070) at graphicsview/qgraphicswidget.cpp:1455
#16 0x00007f3d526ba424 in notify_helper (e=0x7fffbed60070, receiver=0x351fa60, this=0x18aad40) at kernel/qapplication.cpp:4486
#17 QApplicationPrivate::notify_helper (this=0x18aad40, receiver=0x351fa60, e=0x7fffbed60070) at kernel/qapplication.cpp:4458
#18 0x00007f3d526bf291 in QApplication::notify (this=0x1898210, receiver=0x351fa60, e=0x7fffbed60070) at kernel/qapplication.cpp:4365
#19 0x00007f3d53fb8126 in KApplication::notify (this=0x1898210, receiver=0x351fa60, event=0x7fffbed60070) at ../../kdeui/kernel/kapplication.cpp:311
#20 0x00007f3d53309afc in QCoreApplication::notifyInternal (this=0x1898210, receiver=0x351fa60, event=0x7fffbed60070) at kernel/qcoreapplication.cpp:787
#21 0x00007f3d53336d62 in sendEvent (event=0x7fffbed60070, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#22 QTimerInfoList::activateTimers (this=0x18b1c10) at kernel/qeventdispatcher_unix.cpp:603
#23 0x00007f3d53334514 in timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:184
#24 0x00007f3d4a6cda5d in g_main_dispatch (context=0x18b0d40) at /build/buildd/glib2.0-2.30.0/./glib/gmain.c:2441
#25 g_main_context_dispatch (context=0x18b0d40) at /build/buildd/glib2.0-2.30.0/./glib/gmain.c:3011
#26 0x00007f3d4a6ce258 in g_main_context_iterate (context=0x18b0d40, block=<optimized out>, dispatch=1, self=<optimized out>) at /build/buildd/glib2.0-2.30.0/./glib/gmain.c:3089
#27 0x00007f3d4a6ce429 in g_main_context_iteration (context=0x18b0d40, may_block=1) at /build/buildd/glib2.0-2.30.0/./glib/gmain.c:3152
#28 0x00007f3d53334ed6 in QEventDispatcherGlib::processEvents (this=0x17faf40, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:422
#29 0x00007f3d5276207e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=<optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#30 0x00007f3d53308cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#31 0x00007f3d53308ef7 in QEventLoop::exec (this=0x7fffbed60300, flags=...) at kernel/qeventloop.cpp:201
#32 0x00007f3d5330d789 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#33 0x00007f3d5644e1a3 in kdemain (argc=1, argv=0x7fffbed606e8) at ../../../../plasma/desktop/shell/main.cpp:120
#34 0x00007f3d5608f30d in __libc_start_main (main=0x400640 <main(int, char**)>, argc=1, ubp_av=0x7fffbed606e8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffbed606d8) at libc-start.c:226
#35 0x0000000000400671 in _start ()

Possible duplicates by query: bug 291212, bug 291187, bug 291180, bug 291127, bug 291125.

Reported using DrKonqi