Application: plasma-desktop (0.4)
KDE Platform Version: 4.9.00
Qt Version: 4.8.1
Operating System: Linux 3.2.0-29-generic x86_64
Distribution: Ubuntu 12.04 LTS

-- Information about the crash:
- What I was doing when the application crashed:
i logged out normally

- Unusual behavior I noticed:
Plasma is taking up to 100% CPU after an upgrade to 4.9.0

The crash can be reproduced some of the time.

-- Backtrace:
Application: Plasma-Desktop-Umgebung (plasma-desktop), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fae7c34d7c0 (LWP 13750))]

Thread 2 (Thread 0x7fae6a0c3700 (LWP 13779)):
#0  0x0000003b872e6b03 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
#1  0x00007fae83680445 in ?? () from /opt/lib/libmediaclient.so
#2  0x00007fae836824f7 in poll () from /opt/lib/libmediaclient.so
#3  0x0000003b8aa48036 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x0000003b8aa48164 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fae80632426 in QEventDispatcherGlib::processEvents (this=0x7fae640008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#6  0x00007fae80601c82 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007fae80601ed7 in QEventLoop::exec (this=0x7fae6a0c2d90, flags=...) at kernel/qeventloop.cpp:204
#8  0x00007fae80500fa7 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:501
#9  0x00007fae805e19ff in QInotifyFileSystemWatcherEngine::run (this=0x31f0b10) at io/qfilesystemwatcher_inotify.cpp:248
#10 0x00007fae80503fcb in QThreadPrivate::start (arg=0x31f0b10) at thread/qthread_unix.cpp:298
#11 0x0000003b87a07e9a in start_thread (arg=0x7fae6a0c3700) at pthread_create.c:308
#12 0x0000003b872f24bd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#13 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7fae7c34d7c0 (LWP 13750)):
[KCrash Handler]
#6  0x00007fae805980a4 in QProcess::readChannel (this=0x65a1650) at io/qprocess.cpp:1223
#7  0x00007fae8059c771 in QProcess::readAllStandardError (this=0x65a1650) at io/qprocess.cpp:1912
#8  0x00007fae70a14ec9 in ?? () from /usr/lib/kde4/plasma_applet_cwp.so
#9  0x00007fae70a15f79 in ?? () from /usr/lib/kde4/plasma_applet_cwp.so
#10 0x00007fae80617281 in QMetaObject::activate (sender=0x6590130, m=<optimized out>, local_signal_index=<optimized out>, argv=0x7fff05fda8d0) at kernel/qobject.cpp:3547
#11 0x00007fae8059867f in QProcess::finished (this=<optimized out>, _t1=0, _t2=QProcess::CrashExit) at .moc/release-shared/moc_qprocess.cpp:156
#12 0x00007fae8059fcf6 in QProcessPrivate::_q_processDied (this=0x67c59d0) at io/qprocess.cpp:1068
#13 0x00007fae805de0f0 in QProcessPrivate::waitForFinished (this=0x67c59d0, msecs=30000) at io/qprocess_unix.cpp:1251
#14 0x00007fae8059848e in QProcess::waitForFinished (this=0x6590130, msecs=30000) at io/qprocess.cpp:1759
#15 0x00007fae80598902 in QProcess::~QProcess (this=0x6590130, __in_chrg=<optimized out>) at io/qprocess.cpp:1151
#16 0x00007fae80cf20c9 in KProcess::~KProcess (this=0x6590130, __in_chrg=<optimized out>) at ../../kdecore/io/kprocess.cpp:125
#17 0x00007fae70a05708 in ?? () from /usr/lib/kde4/plasma_applet_cwp.so
#18 0x00007fae70a05e49 in ?? () from /usr/lib/kde4/plasma_applet_cwp.so
#19 0x00007fae80615935 in QObjectPrivate::deleteChildren (this=0x278e300) at kernel/qobject.cpp:1908
#20 0x00007fae8061bb9c in QObject::~QObject (this=0x2723bf0, __in_chrg=<optimized out>) at kernel/qobject.cpp:927
#21 0x00007fae7ffc54e1 in ~QGraphicsObject (this=0x2723bf0, __in_chrg=<optimized out>) at ../../include/QtGui/../../src/gui/graphicsview/qgraphicsitem.h:547
#22 QGraphicsWidget::~QGraphicsWidget (this=0x2723bf0, __in_chrg=<optimized out>) at graphicsview/qgraphicswidget.cpp:232
#23 0x00007fae82fafbc2 in Plasma::Applet::~Applet (this=0x2723bf0, __in_chrg=<optimized out>) at ../../plasma/applet.cpp:207
#24 0x00007fae70a2e5d9 in ?? () from /usr/lib/kde4/plasma_applet_cwp.so
#25 0x00007fae82fc02a2 in ~ContainmentPrivate (this=<optimized out>, __in_chrg=<optimized out>) at ../../plasma/private/containment_p.h:72
#26 Plasma::Containment::~Containment (this=0x2623bc0, __in_chrg=<optimized out>) at ../../plasma/containment.cpp:148
#27 0x00007fae730c32b9 in DefaultDesktop::~DefaultDesktop (this=0x2623bc0, __in_chrg=<optimized out>) at ../../../../../plasma/desktop/containments/desktop/desktop.cpp:61
#28 0x00007fae82fd17e7 in qDeleteAll<QList<Plasma::Containment*>::const_iterator> (end=..., begin=...) at /usr/include/qt4/QtCore/qalgorithms.h:322
#29 qDeleteAll<QList<Plasma::Containment*> > (c=...) at /usr/include/qt4/QtCore/qalgorithms.h:330
#30 Plasma::CoronaPrivate::~CoronaPrivate (this=0x2155000, __in_chrg=<optimized out>) at ../../plasma/corona.cpp:806
#31 0x00007fae82fd1a14 in Plasma::Corona::~Corona (this=0x2157310, __in_chrg=<optimized out>) at ../../plasma/corona.cpp:82
#32 0x00007fae83433419 in DesktopCorona::~DesktopCorona (this=0x2157310, __in_chrg=<optimized out>) at ../../../../plasma/desktop/shell/desktopcorona.cpp:74
#33 0x00007fae834554b6 in PlasmaApp::cleanup (this=0x1f46110) at ../../../../plasma/desktop/shell/plasmaapp.cpp:381
#34 0x00007fae8345a4da in qt_static_metacall (_a=<optimized out>, _id=<optimized out>, _o=0x1f46110, _c=<optimized out>) at ./plasmaapp.moc:126
#35 PlasmaApp::qt_static_metacall (_o=0x1f46110, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at ./plasmaapp.moc:101
#36 0x00007fae80617281 in QMetaObject::activate (sender=0x1f46110, m=<optimized out>, local_signal_index=<optimized out>, argv=0x0) at kernel/qobject.cpp:3547
#37 0x00007fae80606fbd in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1153
#38 0x00007fae8343fba3 in kdemain (argc=1, argv=0x7fff05fdb478) at ../../../../plasma/desktop/shell/main.cpp:120
#39 0x0000003b8722176d in __libc_start_main (main=0x400640 <main(int, char**)>, argc=1, ubp_av=0x7fff05fdb478, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff05fdb468) at libc-start.c:226
#40 0x0000000000400671 in _start ()

Possible duplicates by query: bug 280996.

Reported using DrKonqi