Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.3.2 (KDE 4.3.2)
Qt Version: 4.5.2
Operating System: Linux 2.6.31-20-generic i686
Distribution: Ubuntu 9.10

What I was doing when the application crashed:
After leaving the computer idle until the screen saver comes on (15 minutes or so), when I come back and wake it up I am sometimes greeted with the KDE Crash Reporting Assistant stating that plasma-desktop has crashed. However I do not notice any problems or instability in my desktop, plasmoids or panels.

I use the following widgets on my screen saver: Battery Monitor, System Monitor, Analog Clock, Picture Frame. I also require a password to stop the screen saver.

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
[Current thread is 1 (Thread 0xb78db700 (LWP 2620))]

Thread 2 (Thread 0xa8c8ab70 (LWP 2626)):
#0  0x00df2422 in __kernel_vsyscall ()
#1  0x00b17e15 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/tls/i686/cmov/libpthread.so.0
#2  0x00c6087d in pthread_cond_wait () from /lib/tls/i686/cmov/libc.so.6
#3  0x0015fe67 in QWaitConditionPrivate::wait (this=0xa638f68, mutex=0xa638f64, time=4294967295) at thread/qwaitcondition_unix.cpp:87
#4  QWaitCondition::wait (this=0xa638f68, mutex=0xa638f64, time=4294967295) at thread/qwaitcondition_unix.cpp:159
#5  0x00e6d922 in QHostInfoAgent::run (this=0xa638f58) at kernel/qhostinfo.cpp:260
#6  0x0015ee32 in QThreadPrivate::start (arg=0xa638f58) at thread/qthread_unix.cpp:188
#7  0x00b1380e in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#8  0x00c538de in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 1 (Thread 0xb78db700 (LWP 2620)):
[KCrash Handler]
#6  0x0036ad57 in XVisualIDFromVisual () from /usr/lib/libX11.so.6
#7  0x01b4a70e in qt_x11_getX11InfoForWindow (xinfo=0xadcb6ac, a=...) at kernel/qwidget_x11.cpp:400
#8  0x01b51b4e in QWidgetPrivate::create_sys (this=0xadcb5b8, window=16835762, initializeWindow=true, destroyOldWindow=true) at kernel/qwidget_x11.cpp:545
#9  0x01b12b1c in QWidget::create (this=0xa58b4f8, window=16835762, initializeWindow=true, destroyOldWindow=<value optimized out>) at kernel/qwidget.cpp:1253
#10 0x03546c1e in SystemTray::X11EmbedContainer::embedSystemTrayClient (this=0xa58b4f8, clientId=58720311) at ../../../../plasma/applets/systemtray/protocols/fdo/x11embedcontainer.cpp:110
#11 0x035423f0 in SystemTray::FdoGraphicsWidget::setupXEmbedDelegate (this=0xab6bf48) at ../../../../plasma/applets/systemtray/protocols/fdo/fdographicswidget.cpp:159
#12 0x035424cb in SystemTray::FdoGraphicsWidget::qt_metacall (this=0xab6bf48, _c=QMetaObject::InvokeMetaMethod, _id=6, _a=0xbfca463c) at ./fdographicswidget.moc:78
#13 0x00265263 in QMetaObject::activate (sender=0xa6816c0, from_signal_index=4, to_signal_index=4, argv=0x0) at kernel/qobject.cpp:3113
#14 0x00265ec2 in QMetaObject::activate (sender=0xa6816c0, m=0x33f908, local_signal_index=0, argv=0x0) at kernel/qobject.cpp:3187
#15 0x0026a387 in QSingleShotTimer::timeout (this=0xa6816c0) at .moc/release-shared/qtimer.moc:76
#16 0x0026a49c in QSingleShotTimer::timerEvent (this=0xa6816c0) at kernel/qtimer.cpp:298
#17 0x0025f3bf in QObject::event (this=0xa6816c0, e=0xbfca4ad0) at kernel/qobject.cpp:1075
#18 0x01abbf54 in QApplicationPrivate::notify_helper (this=0x9953398, receiver=0xa6816c0, e=0xbfca4ad0) at kernel/qapplication.cpp:4056
#19 0x01ac367c in QApplication::notify (this=0x992c550, receiver=0xa6816c0, e=0xbfca4ad0) at kernel/qapplication.cpp:3603
#20 0x01154bfa in KApplication::notify (this=0x992c550, receiver=0xa6816c0, event=0xbfca4ad0) at ../../kdeui/kernel/kapplication.cpp:302
#21 0x0024f6cb in QCoreApplication::notifyInternal (this=0x992c550, receiver=0xa6816c0, event=0xbfca4ad0) at kernel/qcoreapplication.cpp:610
#22 0x0027c7ce in QCoreApplication::sendEvent (this=0x9955f74) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#23 QTimerInfoList::activateTimers (this=0x9955f74) at kernel/qeventdispatcher_unix.cpp:572
#24 0x0027a0e0 in timerSourceDispatch (source=0x9955f40) at kernel/qeventdispatcher_glib.cpp:165
#25 0x00a8fe88 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#26 0x00a93730 in ?? () from /lib/libglib-2.0.so.0
#27 0x00a93863 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#28 0x0027a02c in QEventDispatcherGlib::processEvents (this=0x9953188, flags=...) at kernel/qeventdispatcher_glib.cpp:327
#29 0x01b5cbe5 in QGuiEventDispatcherGlib::processEvents (this=0x9953188, flags=...) at kernel/qguieventdispatcher_glib.cpp:202
#30 0x0024dc79 in QEventLoop::processEvents (this=0xbfca4d94, flags=) at kernel/qeventloop.cpp:149
#31 0x0024e0ca in QEventLoop::exec (this=0xbfca4d94, flags=...) at kernel/qeventloop.cpp:201
#32 0x0025053f in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#33 0x01abbdd7 in QApplication::exec () at kernel/qapplication.cpp:3525
#34 0x05c6380d in kdemain (argc=1, argv=0x98c11e8) at ../../../../plasma/shells/desktop/main.cpp:50
#35 0x0804dde1 in launch (argc=<value optimized out>, _name=<value optimized out>, args=<value optimized out>, cwd=0x0, envc=0, envs=0x98da620 "", reset_env=false, tty=0x0, avoid_loops=false, 
    startup_id_str=0x80511a5 "0") at ../../kinit/kinit.cpp:677
#36 0x0804ea35 in handle_launcher_request (sock=<value optimized out>, who=<value optimized out>) at ../../kinit/kinit.cpp:1169
#37 0x0804eeac in handle_requests (waitForPid=<value optimized out>) at ../../kinit/kinit.cpp:1362
#38 0x0804fbaf in main (argc=2, argv=0xbfca55f4, envp=0xbfca5600) at ../../kinit/kinit.cpp:1793

This bug may be a duplicate of or related to bug 225021

Reported using DrKonqi