Application: plasma-desktop (0.4)
KDE Platform Version: 4.7.2 (4.7.2)
Qt Version: 4.7.4
Operating System: Linux 3.2.0-rc6-Doward x86_64
Distribution (Platform): Gentoo Packages

-- Information about the crash:
Restart the computer, upon KDM login my #2 screen (dual monitors) is perfect, #1 screen shows folder icons, but no task panels.  Right clicking on #1 screen lets me add 'default panel' and generates this crash.

The crash can be reproduced every time.

-- Backtrace:
Application: Plasma Desktop Shell (kdeinit4), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f68c0b93760 (LWP 3691))]

Thread 3 (Thread 0x7f68a1480700 (LWP 3694)):
#0  0x00007f68be1a7873 in *__GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007f68bb1b8574 in g_main_context_poll (n_fds=1, fds=0x7f689c0024a0, timeout=-1, context=0x7f689c0009a0, priority=<optimized out>) at gmain.c:3402
#2  g_main_context_iterate (context=0x7f689c0009a0, block=1, dispatch=1, self=<optimized out>) at gmain.c:3084
#3  0x00007f68bb1b89df in g_main_context_iteration (context=0x7f689c0009a0, may_block=1) at gmain.c:3152
#4  0x00007f68bf7d1c76 in QEventDispatcherGlib::processEvents (this=0x7f689c0008b0, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#5  0x00007f68bf7a5e32 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#6  0x00007f68bf7a60b4 in QEventLoop::exec (this=0x7f68a147fde0, flags=...) at kernel/qeventloop.cpp:201
#7  0x00007f68bf6bbf04 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#8  0x00007f68bf787ac0 in QInotifyFileSystemWatcherEngine::run (this=0x1d08790) at io/qfilesystemwatcher_inotify.cpp:248
#9  0x00007f68bf6be785 in QThreadPrivate::start (arg=0x1d08790) at thread/qthread_unix.cpp:331
#10 0x00007f68bf42ee9c in start_thread (arg=0x7f68a1480700) at pthread_create.c:301
#11 0x00007f68be1b07ed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:115

Thread 2 (Thread 0x7f689a9c6700 (LWP 3881)):
#0  pthread_cond_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007f68b35a9c8c in QTWTF::TCMalloc_PageHeap::scavengerThread (this=0x7f68b38cc180) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:2359
#2  0x00007f68b35a9cc9 in QTWTF::TCMalloc_PageHeap::runScavengerThread (context=0x7f68b38da254) at ../3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:1464
#3  0x00007f68bf42ee9c in start_thread (arg=0x7f689a9c6700) at pthread_create.c:301
#4  0x00007f68be1b07ed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:115

Thread 1 (Thread 0x7f68c0b93760 (LWP 3691)):
[KCrash Handler]
#6  0x00007f68bef08284 in QGraphicsLayoutItem::setParentLayoutItem (this=0x26151c0, parent=0x0) at graphicsview/qgraphicslayoutitem.cpp:856
#7  0x00007f68beedbda0 in QGraphicsGridLayout::removeAt (this=0x2681de0, index=<optimized out>) at graphicsview/qgraphicsgridlayout.cpp:583
#8  0x00007f68a9e0a68a in SystemTray::TaskArea::relayoutHiddenTasks (this=0x261f910) at /var/tmp/portage/kde-base/plasma-workspace-4.7.2/work/plasma-workspace-4.7.2/plasma/generic/applets/systemtray/ui/taskarea.cpp:422
#9  0x00007f68a9e0ab1c in SystemTray::TaskArea::qt_metacall (this=0x261f910, _c=QMetaObject::InvokeMetaMethod, _id=<optimized out>, _a=0x7fff1740b200) at /var/tmp/portage/kde-base/plasma-workspace-4.7.2/work/plasma-workspace-4.7.2_build/plasma/generic/applets/systemtray/taskarea.moc:93
#10 0x00007f68bf7bb4bf in QMetaObject::activate (sender=0x261f5c0, m=<optimized out>, local_signal_index=<optimized out>, argv=0x0) at kernel/qobject.cpp:3278
#11 0x00007f68bf7bac99 in QObject::event (this=0x261f5c0, e=<optimized out>) at kernel/qobject.cpp:1181
#12 0x00007f68be934b5c in QApplicationPrivate::notify_helper (this=0x11a7710, receiver=0x261f5c0, e=0x7fff1740b940) at kernel/qapplication.cpp:4481
#13 0x00007f68be9396ba in QApplication::notify (this=<optimized out>, receiver=0x261f5c0, e=0x7fff1740b940) at kernel/qapplication.cpp:4360
#14 0x00007f68c0571528 in KApplication::notify (this=0x118b8e0, receiver=0x261f5c0, event=0x7fff1740b940) at /var/tmp/portage/kde-base/kdelibs-4.7.2/work/kdelibs-4.7.2/kdeui/kernel/kapplication.cpp:311
#15 0x00007f68bf7a6aeb in QCoreApplication::notifyInternal (this=0x118b8e0, receiver=0x261f5c0, event=0x7fff1740b940) at kernel/qcoreapplication.cpp:787
#16 0x00007f68bf7d45a9 in sendEvent (event=0x7fff1740b940, receiver=<optimized out>) at kernel/qcoreapplication.h:215
#17 QTimerInfoList::activateTimers (this=0x11af380) at kernel/qeventdispatcher_unix.cpp:603
#18 0x00007f68bf7d1554 in timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:184
#19 0x00007f68bb1b803a in g_main_dispatch (context=0x11afc00) at gmain.c:2441
#20 g_main_context_dispatch (context=0x11afc00) at gmain.c:3011
#21 0x00007f68bb1b8848 in g_main_context_iterate (context=0x11afc00, block=1, dispatch=1, self=<optimized out>) at gmain.c:3089
#22 0x00007f68bb1b89df in g_main_context_iteration (context=0x11afc00, may_block=1) at gmain.c:3152
#23 0x00007f68bf7d1c3a in QEventDispatcherGlib::processEvents (this=0x11a6250, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:422
#24 0x00007f68be9dafa6 in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=<optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#25 0x00007f68bf7a5e32 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#26 0x00007f68bf7a60b4 in QEventLoop::exec (this=0x7fff1740bbd0, flags=...) at kernel/qeventloop.cpp:201
#27 0x00007f68bf7aa59b in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#28 0x00007f68b0d80403 in kdemain (argc=1, argv=0x110ad70) at /var/tmp/portage/kde-base/plasma-workspace-4.7.2/work/plasma-workspace-4.7.2/plasma/desktop/shell/main.cpp:120
#29 0x0000000000407566 in launch (argc=1, _name=0x110ad38 "/usr/bin/plasma-desktop", args=<optimized out>, cwd=0x0, envc=<optimized out>, envs=<optimized out>, reset_env=false, tty=0x0, avoid_loops=false, startup_id_str=0x40b64e "0") at /var/tmp/portage/kde-base/kdelibs-4.7.2/work/kdelibs-4.7.2/kinit/kinit.cpp:734
#30 0x0000000000408120 in handle_launcher_request (sock=<optimized out>, who=<optimized out>) at /var/tmp/portage/kde-base/kdelibs-4.7.2/work/kdelibs-4.7.2/kinit/kinit.cpp:1226
#31 0x0000000000408845 in handle_requests (waitForPid=0) at /var/tmp/portage/kde-base/kdelibs-4.7.2/work/kdelibs-4.7.2/kinit/kinit.cpp:1419
#32 0x0000000000409491 in main (argc=2, argv=0x7fff1740ce58, envp=0x7fff1740ce70) at /var/tmp/portage/kde-base/kdelibs-4.7.2/work/kdelibs-4.7.2/kinit/kinit.cpp:1907

This bug may be a duplicate of or related to bug 287387.

Possible duplicates by query: bug 288804, bug 288096, bug 287387, bug 285813, bug 285799.

Reported using DrKonqi