Application: plasma-desktop (0.4)
KDE Platform Version: 4.7.3 (4.7.3)
Qt Version: 4.7.4
Operating System: Linux 3.1.0-030100-generic x86_64
Distribution: Ubuntu 11.10

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

Plasma desktop shell crashes when laptop switches to aggressive power save mode.

The crash can be reproduced some of the time.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0x7fe80f88d7a0 (LWP 1646))]

Thread 8 (Thread 0x7fe7ed1d2700 (LWP 1647)):
#0  0x00007fff399ff7b6 in ?? ()
#1  0x00007fe80399c07b in __GI_clock_gettime (clock_id=1, tp=0x7fe7ed1d1b20) at ../sysdeps/unix/clock_gettime.c:100
#2  0x00007fe80c28c074 in do_gettime (frac=0x7fe7ed1d1b38, sec=0x7fe7ed1d1b30) at tools/qelapsedtimer_unix.cpp:123
#3  qt_gettime () at tools/qelapsedtimer_unix.cpp:140
#4  0x00007fe80c34e6ed in QTimerInfoList::updateCurrentTime (this=0x203ced0) at kernel/qeventdispatcher_unix.cpp:339
#5  0x00007fe80c34ea33 in QTimerInfoList::timerWait (this=0x203ced0, tm=...) at kernel/qeventdispatcher_unix.cpp:442
#6  0x00007fe80c34d44c in timerSourcePrepareHelper (src=<optimized out>, timeout=0x7fe7ed1d1c1c) at kernel/qeventdispatcher_glib.cpp:136
#7  0x00007fe80c34d4f5 in timerSourcePrepare (source=<optimized out>, timeout=<optimized out>) at kernel/qeventdispatcher_glib.cpp:169
#8  0x00007fe8036e5ff2 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#9  0x00007fe8036e6dfd in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#10 0x00007fe8036e7429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#11 0x00007fe80c34df3e in QEventDispatcherGlib::processEvents (this=0x2034e10, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#12 0x00007fe80c321cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#13 0x00007fe80c321ef7 in QEventLoop::exec (this=0x7fe7ed1d1db0, flags=...) at kernel/qeventloop.cpp:201
#14 0x00007fe80c23927f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#15 0x00007fe80c304cbf in QInotifyFileSystemWatcherEngine::run (this=0x20336e0) at io/qfilesystemwatcher_inotify.cpp:248
#16 0x00007fe80c23bd05 in QThreadPrivate::start (arg=0x20336e0) at thread/qthread_unix.cpp:331
#17 0x00007fe8041f3efc in start_thread (arg=0x7fe7ed1d2700) at pthread_create.c:304
#18 0x00007fe80f16889d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#19 0x0000000000000000 in ?? ()

Thread 7 (Thread 0x7fe7e67f4700 (LWP 1648)):
#0  0x00007fff399ff7b6 in ?? ()
#1  0x00007fe80399c07b in __GI_clock_gettime (clock_id=1, tp=0x7fe7e67f3b20) at ../sysdeps/unix/clock_gettime.c:100
#2  0x00007fe80c28c074 in do_gettime (frac=0x7fe7e67f3b38, sec=0x7fe7e67f3b30) at tools/qelapsedtimer_unix.cpp:123
#3  qt_gettime () at tools/qelapsedtimer_unix.cpp:140
#4  0x00007fe80c34e6ed in QTimerInfoList::updateCurrentTime (this=0x1b2b1f0) at kernel/qeventdispatcher_unix.cpp:339
#5  0x00007fe80c34ea33 in QTimerInfoList::timerWait (this=0x1b2b1f0, tm=...) at kernel/qeventdispatcher_unix.cpp:442
#6  0x00007fe80c34d44c in timerSourcePrepareHelper (src=<optimized out>, timeout=0x7fe7e67f3c1c) at kernel/qeventdispatcher_glib.cpp:136
#7  0x00007fe80c34d4f5 in timerSourcePrepare (source=<optimized out>, timeout=<optimized out>) at kernel/qeventdispatcher_glib.cpp:169
#8  0x00007fe8036e5ff2 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#9  0x00007fe8036e6dfd in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#10 0x00007fe8036e7429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#11 0x00007fe80c34df3e in QEventDispatcherGlib::processEvents (this=0x18fab10, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#12 0x00007fe80c321cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#13 0x00007fe80c321ef7 in QEventLoop::exec (this=0x7fe7e67f3db0, flags=...) at kernel/qeventloop.cpp:201
#14 0x00007fe80c23927f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:498
#15 0x00007fe80c304cbf in QInotifyFileSystemWatcherEngine::run (this=0x191b830) at io/qfilesystemwatcher_inotify.cpp:248
#16 0x00007fe80c23bd05 in QThreadPrivate::start (arg=0x191b830) at thread/qthread_unix.cpp:331
#17 0x00007fe8041f3efc in start_thread (arg=0x7fe7e67f4700) at pthread_create.c:304
#18 0x00007fe80f16889d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#19 0x0000000000000000 in ?? ()

Thread 6 (Thread 0x7fe7e0a68700 (LWP 1656)):
#0  0x00007fe80f15c773 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007fe8036e6f68 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fe8036e7792 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fe7e1546516 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#4  0x00007fe80370c2b6 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fe8041f3efc in start_thread (arg=0x7fe7e0a68700) at pthread_create.c:304
#6  0x00007fe80f16889d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#7  0x0000000000000000 in ?? ()

Thread 5 (Thread 0x7fe7dd75b700 (LWP 1903)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007fe80c23c1ab in wait (time=18446744073709551615, this=0x20f1560) at thread/qwaitcondition_unix.cpp:88
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x208cdd0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:160
#3  0x00007fe808036864 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x2116f40, th=0x220e020) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007fe808038e0b in ThreadWeaver::WorkingHardState::applyForWork (this=0x2061b20, th=0x220e020) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007fe808037ccf in ThreadWeaver::ThreadRunHelper::run (this=0x7fe7dd75ae00, parent=0x2116f40, th=0x220e020) at ../../../threadweaver/Weaver/Thread.cpp:87
#6  0x00007fe808037d5b in ThreadWeaver::Thread::run (this=0x220e020) at ../../../threadweaver/Weaver/Thread.cpp:142
#7  0x00007fe80c23bd05 in QThreadPrivate::start (arg=0x220e020) at thread/qthread_unix.cpp:331
#8  0x00007fe8041f3efc in start_thread (arg=0x7fe7dd75b700) at pthread_create.c:304
#9  0x00007fe80f16889d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#10 0x0000000000000000 in ?? ()

Thread 4 (Thread 0x7fe7dcf5a700 (LWP 1904)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007fe80c23c1ab in wait (time=18446744073709551615, this=0x20f1560) at thread/qwaitcondition_unix.cpp:88
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x208cdd0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:160
#3  0x00007fe808036864 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x2116f40, th=0x2b96df0) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007fe808038e0b in ThreadWeaver::WorkingHardState::applyForWork (this=0x2061b20, th=0x2b96df0) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007fe808037ccf in ThreadWeaver::ThreadRunHelper::run (this=0x7fe7dcf59e00, parent=0x2116f40, th=0x2b96df0) at ../../../threadweaver/Weaver/Thread.cpp:87
#6  0x00007fe808037d5b in ThreadWeaver::Thread::run (this=0x2b96df0) at ../../../threadweaver/Weaver/Thread.cpp:142
#7  0x00007fe80c23bd05 in QThreadPrivate::start (arg=0x2b96df0) at thread/qthread_unix.cpp:331
#8  0x00007fe8041f3efc in start_thread (arg=0x7fe7dcf5a700) at pthread_create.c:304
#9  0x00007fe80f16889d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#10 0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7fe7dc759700 (LWP 1905)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007fe80c23c1ab in wait (time=18446744073709551615, this=0x20f1560) at thread/qwaitcondition_unix.cpp:88
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x208cdd0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:160
#3  0x00007fe808036864 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x2116f40, th=0x2343a90) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007fe808038e0b in ThreadWeaver::WorkingHardState::applyForWork (this=0x2061b20, th=0x2343a90) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007fe808037ccf in ThreadWeaver::ThreadRunHelper::run (this=0x7fe7dc758e00, parent=0x2116f40, th=0x2343a90) at ../../../threadweaver/Weaver/Thread.cpp:87
#6  0x00007fe808037d5b in ThreadWeaver::Thread::run (this=0x2343a90) at ../../../threadweaver/Weaver/Thread.cpp:142
#7  0x00007fe80c23bd05 in QThreadPrivate::start (arg=0x2343a90) at thread/qthread_unix.cpp:331
#8  0x00007fe8041f3efc in start_thread (arg=0x7fe7dc759700) at pthread_create.c:304
#9  0x00007fe80f16889d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#10 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7fe7dbf58700 (LWP 1906)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:162
#1  0x00007fe80c23c1ab in wait (time=18446744073709551615, this=0x20f1560) at thread/qwaitcondition_unix.cpp:88
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x208cdd0, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:160
#3  0x00007fe808036864 in ThreadWeaver::WeaverImpl::blockThreadUntilJobsAreBeingAssigned (this=0x2116f40, th=0x2b94880) at ../../../threadweaver/Weaver/WeaverImpl.cpp:365
#4  0x00007fe808038e0b in ThreadWeaver::WorkingHardState::applyForWork (this=0x2061b20, th=0x2b94880) at ../../../threadweaver/Weaver/WorkingHardState.cpp:71
#5  0x00007fe808037ccf in ThreadWeaver::ThreadRunHelper::run (this=0x7fe7dbf57e00, parent=0x2116f40, th=0x2b94880) at ../../../threadweaver/Weaver/Thread.cpp:87
#6  0x00007fe808037d5b in ThreadWeaver::Thread::run (this=0x2b94880) at ../../../threadweaver/Weaver/Thread.cpp:142
#7  0x00007fe80c23bd05 in QThreadPrivate::start (arg=0x2b94880) at thread/qthread_unix.cpp:331
#8  0x00007fe8041f3efc in start_thread (arg=0x7fe7dbf58700) at pthread_create.c:304
#9  0x00007fe80f16889d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#10 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7fe80f88d7a0 (LWP 1646)):
[KCrash Handler]
#6  isNull (this=0x637268636e75) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:568
#7  operator! (this=0x637268636e75) at /usr/include/qt4/QtCore/qsharedpointer_impl.h:574
#8  TaskManager::TaskItem::task (this=0x320a740) at ../../../libs/taskmanager/taskitem.cpp:113
#9  0x00007fe7f5d33112 in WindowTaskItem::publishIconGeometry (this=0x28c3e40) at ../../../../../plasma/desktop/applets/tasks/windowtaskitem.cpp:120
#10 0x00007fe7f5d41b7c in AbstractTaskItem::timerEvent (this=0x28c3e40, event=<optimized out>) at ../../../../../plasma/desktop/applets/tasks/abstracttaskitem.cpp:439
#11 0x00007fe80c339789 in QObject::event (this=0x28c3e40, e=<optimized out>) at kernel/qobject.cpp:1181
#12 0x00007fe80bcf189b in QGraphicsWidget::event (this=0x28c3e40, event=0x7fff398ed8b0) at graphicsview/qgraphicswidget.cpp:1455
#13 0x00007fe80b6d3424 in notify_helper (e=0x7fff398ed8b0, receiver=0x28c3e40, this=0x18a11a0) at kernel/qapplication.cpp:4486
#14 QApplicationPrivate::notify_helper (this=0x18a11a0, receiver=0x28c3e40, e=0x7fff398ed8b0) at kernel/qapplication.cpp:4458
#15 0x00007fe80b6d8291 in QApplication::notify (this=0x188f1d0, receiver=0x28c3e40, e=0x7fff398ed8b0) at kernel/qapplication.cpp:4365
#16 0x00007fe80cfd1126 in KApplication::notify (this=0x188f1d0, receiver=0x28c3e40, event=0x7fff398ed8b0) at ../../kdeui/kernel/kapplication.cpp:311
#17 0x00007fe80c322afc in QCoreApplication::notifyInternal (this=0x188f1d0, receiver=0x28c3e40, event=0x7fff398ed8b0) at kernel/qcoreapplication.cpp:787
#18 0x00007fe80c34fd62 in sendEvent (event=0x7fff398ed8b0, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#19 QTimerInfoList::activateTimers (this=0x18a0840) at kernel/qeventdispatcher_unix.cpp:603
#20 0x00007fe80c34d514 in timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:184
#21 0x00007fe8036e6a5d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#22 0x00007fe8036e7258 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#23 0x00007fe8036e7429 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007fe80c34ded6 in QEventDispatcherGlib::processEvents (this=0x1831f40, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:422
#25 0x00007fe80b77b07e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=<optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#26 0x00007fe80c321cf2 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#27 0x00007fe80c321ef7 in QEventLoop::exec (this=0x7fff398edb40, flags=...) at kernel/qeventloop.cpp:201
#28 0x00007fe80c326789 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#29 0x00007fe80f4671a3 in kdemain (argc=1, argv=0x7fff398edf28) at ../../../../plasma/desktop/shell/main.cpp:120
#30 0x00007fe80f0a830d in __libc_start_main (main=0x400640 <main(int, char**)>, argc=1, ubp_av=0x7fff398edf28, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff398edf18) at libc-start.c:226
#31 0x0000000000400671 in _start ()

Possible duplicates by query: bug 288430, bug 288383, bug 288343, bug 288295, bug 288262.

Reported using DrKonqi