Application: plasma-desktop (4.11.2)
KDE Platform Version: 4.11.2
Qt Version: 4.8.4
Operating System: Linux 3.11.0-12-generic x86_64
Distribution: Ubuntu 13.10

-- Information about the crash:
- What I was doing when the application crashed:
Rebooting after power off
- Unusual behavior I noticed:
after logging into kde all I saw was a black screen. had use of mouse and desktop. graphic applications started from command line worked fine. Guest login showed no changes.  Setting composting to false fixed problem.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f06183ee7c0 (LWP 4829))]

Thread 8 (Thread 0x7f05f3867700 (LWP 4830)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f0612c551cd in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#2  0x00007f0612c55209 in ?? () from /usr/lib/x86_64-linux-gnu/libQtWebKit.so.4
#3  0x00007f060b746f6e in start_thread (arg=0x7f05f3867700) at pthread_create.c:311
#4  0x00007f0617cd99cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 7 (Thread 0x7f05a7fff700 (LWP 4834)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f061108c06b in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#2  0x00007f061108c0a9 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#3  0x00007f060b746f6e in start_thread (arg=0x7f05a7fff700) at pthread_create.c:311
#4  0x00007f0617cd99cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 6 (Thread 0x7f051c671700 (LWP 4841)):
#0  __GI___pthread_mutex_lock (mutex=0x7f0514000a60) at pthread_mutex_lock.c:54
#1  0x00007f060b07c391 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f060b03c649 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f060b03c79c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f06148a5a76 in QEventDispatcherGlib::processEvents (this=0x7f05140008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#5  0x00007f06148775ef in QEventLoop::processEvents (this=this@entry=0x7f051c670d70, flags=...) at kernel/qeventloop.cpp:149
#6  0x00007f06148778e5 in QEventLoop::exec (this=this@entry=0x7f051c670d70, flags=...) at kernel/qeventloop.cpp:204
#7  0x00007f061477688f in QThread::exec (this=this@entry=0x372c1a0) at thread/qthread.cpp:542
#8  0x00007f0614858d13 in QInotifyFileSystemWatcherEngine::run (this=0x372c1a0) at io/qfilesystemwatcher_inotify.cpp:265
#9  0x00007f0614778f2f in QThreadPrivate::start (arg=0x372c1a0) at thread/qthread_unix.cpp:338
#10 0x00007f060b746f6e in start_thread (arg=0x7f051c671700) at pthread_create.c:311
#11 0x00007f0617cd99cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 5 (Thread 0x7f05189b2700 (LWP 4842)):
#0  0x00007f060b039b47 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f060b03bcdb in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f060b03c5b3 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f060b03c79c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f06148a5a76 in QEventDispatcherGlib::processEvents (this=0x7f050c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#5  0x00007f06148775ef in QEventLoop::processEvents (this=this@entry=0x7f05189b1d70, flags=...) at kernel/qeventloop.cpp:149
#6  0x00007f06148778e5 in QEventLoop::exec (this=this@entry=0x7f05189b1d70, flags=...) at kernel/qeventloop.cpp:204
#7  0x00007f061477688f in QThread::exec (this=this@entry=0x3f08260) at thread/qthread.cpp:542
#8  0x00007f0614858d13 in QInotifyFileSystemWatcherEngine::run (this=0x3f08260) at io/qfilesystemwatcher_inotify.cpp:265
#9  0x00007f0614778f2f in QThreadPrivate::start (arg=0x3f08260) at thread/qthread_unix.cpp:338
#10 0x00007f060b746f6e in start_thread (arg=0x7f05189b2700) at pthread_create.c:311
#11 0x00007f0617cd99cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 4 (Thread 0x7f05111d3700 (LWP 4843)):
#0  0x00007f060b07b653 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f060b03c1bc in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f060b03c62b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f060b03c79c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f06148a5a76 in QEventDispatcherGlib::processEvents (this=0x7f05080008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#5  0x00007f06148775ef in QEventLoop::processEvents (this=this@entry=0x7f05111d2db0, flags=...) at kernel/qeventloop.cpp:149
#6  0x00007f06148778e5 in QEventLoop::exec (this=this@entry=0x7f05111d2db0, flags=...) at kernel/qeventloop.cpp:204
#7  0x00007f061477688f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:542
#8  0x00007f0614778f2f in QThreadPrivate::start (arg=0x40bffc0) at thread/qthread_unix.cpp:338
#9  0x00007f060b746f6e in start_thread (arg=0x7f05111d3700) at pthread_create.c:311
#10 0x00007f0617cd99cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 3 (Thread 0x7f05231a2700 (LWP 4855)):
#0  0x00007f0617cccf7d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f060b03c694 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f060b03c79c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f06148a5a76 in QEventDispatcherGlib::processEvents (this=0x7f04fc0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#4  0x00007f06148775ef in QEventLoop::processEvents (this=this@entry=0x7f05231a1db0, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f06148778e5 in QEventLoop::exec (this=this@entry=0x7f05231a1db0, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007f061477688f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:542
#7  0x00007f0614778f2f in QThreadPrivate::start (arg=0x398e230) at thread/qthread_unix.cpp:338
#8  0x00007f060b746f6e in start_thread (arg=0x7f05231a2700) at pthread_create.c:311
#9  0x00007f0617cd99cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 2 (Thread 0x7f05077fe700 (LWP 5210)):
#0  0x00007f060b749055 in __GI___pthread_mutex_lock (mutex=0x7f04f8002cc0) at pthread_mutex_lock.c:95
#1  0x00007f060b07c391 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f060b03bc07 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f060b03c5b3 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f060b03c79c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f06148a5a76 in QEventDispatcherGlib::processEvents (this=0x7f04f8002430, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#6  0x00007f06148775ef in QEventLoop::processEvents (this=this@entry=0x7f05077fddb0, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007f06148778e5 in QEventLoop::exec (this=this@entry=0x7f05077fddb0, flags=...) at kernel/qeventloop.cpp:204
#8  0x00007f061477688f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:542
#9  0x00007f0614778f2f in QThreadPrivate::start (arg=0x5c8df60) at thread/qthread_unix.cpp:338
#10 0x00007f060b746f6e in start_thread (arg=0x7f05077fe700) at pthread_create.c:311
#11 0x00007f0617cd99cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 1 (Thread 0x7f06183ee7c0 (LWP 4829)):
[KCrash Handler]
#6  0x00007f05111e9c86 in RTM::Auth::getAuthUrl (this=this@entry=0x4097340) at ../../../libs/rtm/auth.cpp:82
#7  0x00007f05111dc18e in RTM::Session::handleValidToken (this=0x3f98910, valid=<optimized out>) at ../../../libs/rtm/session.cpp:131
#8  0x00007f05111df29e in RTM::Session::qt_static_metacall (_o=0x7fffcb87c130, _id=67728192, _a=0x7f0614bd89d0 <vtable for QEvent+16>, _c=<optimized out>) at ./moc_session.cpp:114
#9  0x00007f061488ca58 in QMetaObject::activate (sender=sender@entry=0x3f98910, m=m@entry=0x7f05113f59e0 <RTM::Session::staticMetaObject>, local_signal_index=local_signal_index@entry=1, argv=argv@entry=0x7fffcb87c380) at kernel/qobject.cpp:3539
#10 0x00007f05111dc772 in RTM::Session::tokenCheck (this=this@entry=0x3f98910, _t1=_t1@entry=false) at ./moc_session.cpp:185
#11 0x00007f05111dc7a6 in RTM::Session::checkToken (this=0x3f98910) at ../../../libs/rtm/session.cpp:152
#12 0x00007f05111ddc7e in RTM::Session::Session (this=0x3f98910, apiKey=..., sharedSecret=..., permissions=RTM::Delete, token=..., parent=<optimized out>) at ../../../libs/rtm/session.cpp:53
#13 0x00007f05113fe96c in RtmEngine::RtmEngine (this=0x40944b0, parent=<optimized out>, args=...) at ../../../dataengines/rememberthemilk/rtmengine.cpp:51
#14 0x00007f05113ff3d8 in KPluginFactory::createInstance<RtmEngine, QObject> (parentWidget=<optimized out>, parent=<optimized out>, args=...) at /usr/include/kpluginfactory.h:477
#15 0x00007f0615058083 in KPluginFactory::create (this=0x4066b20, iface=0x7f06179526c0 <qt_meta_stringdata_Plasma__DataEngine> "Plasma::DataEngine", parentWidget=0x0, parent=0x0, args=..., keyword=...) at ../../kdecore/util/kpluginfactory.cpp:203
#16 0x00007f061780f679 in create<Plasma::DataEngine> (args=..., keyword=..., parent=0x0, parentWidget=0x0, this=0x4066b20) at ../../kdecore/util/kpluginfactory.h:531
#17 createInstance<Plasma::DataEngine> (error=0x7fffcb87c600, args=..., parent=0x0, parentWidget=0x0, this=0x4061290) at ../../kdecore/services/kservice.h:573
#18 createInstance<Plasma::DataEngine> (error=0x7fffcb87c600, args=..., parent=0x0, this=0x4061290) at ../../kdecore/services/kservice.h:550
#19 Plasma::PluginLoader::loadDataEngine (this=<optimized out>, name=...) at ../../plasma/pluginloader.cpp:184
#20 0x00007f06177f94e0 in Plasma::DataEngineManager::loadEngine (this=0x17d9140, name=...) at ../../plasma/dataenginemanager.cpp:132
#21 0x00007f061782a8eb in Plasma::DataEngineConsumer::dataEngine (this=0x2885f30, name=...) at ../../plasma/private/dataengineconsumer.cpp:105
#22 0x00007f06177c1f6c in Plasma::Applet::dataEngine (this=this@entry=0x2884160, name=...) at ../../plasma/applet.cpp:685
#23 0x00007f05f3879886 in RememberTheMilkPlasmoid::graphicsWidget (this=0x2884160) at ../../../applets/rememberthemilk/rememberthemilk-plasmoid.cpp:317
#24 0x00007f05f387a1e4 in RememberTheMilkPlasmoid::init (this=0x2884160) at ../../../applets/rememberthemilk/rememberthemilk-plasmoid.cpp:88
#25 0x00007f06177e52dc in Plasma::ContainmentPrivate::initApplets (this=0x2863610) at ../../plasma/containment.cpp:460
#26 0x00007f06177f21ac in Plasma::CoronaPrivate::importLayout (this=0x136e7c0, conf=..., mergeConfig=mergeConfig@entry=false) at ../../plasma/corona.cpp:1067
#27 0x00007f06177f2bac in Plasma::Corona::loadLayout (this=this@entry=0x112bec0, configName=...) at ../../plasma/corona.cpp:278
#28 0x00007f06177f2c62 in Plasma::Corona::initializeLayout (this=this@entry=0x112bec0, configName=...) at ../../plasma/corona.cpp:181
#29 0x00007f0617ff7eaa in PlasmaApp::corona (this=this@entry=0x113fcf0, createIfMissing=createIfMissing@entry=true) at ../../../../plasma/desktop/shell/plasmaapp.cpp:856
#30 0x00007f0617ff84b5 in PlasmaApp::setupDesktop (this=0x113fcf0) at ../../../../plasma/desktop/shell/plasmaapp.cpp:314
#31 0x00007f0617ffc815 in PlasmaApp::qt_static_metacall (_o=0x113fcf0, _id=67728192, _a=0x7f0614bd89d0 <vtable for QEvent+16>, _c=<optimized out>) at ./plasmaapp.moc:129
#32 0x00007f0614890dce in QObject::event (this=this@entry=0x113fcf0, e=e@entry=0x12c16e0) at kernel/qobject.cpp:1194
#33 0x00007f061487cfdc in QCoreApplication::event (this=this@entry=0x113fcf0, e=e@entry=0x12c16e0) at kernel/qcoreapplication.cpp:1758
#34 0x00007f0613c1aea3 in QApplication::event (this=0x113fcf0, e=0x12c16e0) at kernel/qapplication.cpp:2549
#35 0x00007f0613c15dfc in QApplicationPrivate::notify_helper (this=this@entry=0x1155b00, receiver=receiver@entry=0x113fcf0, e=e@entry=0x12c16e0) at kernel/qapplication.cpp:4567
#36 0x00007f0613c1c470 in QApplication::notify (this=this@entry=0x113fcf0, receiver=receiver@entry=0x113fcf0, e=e@entry=0x12c16e0) at kernel/qapplication.cpp:4353
#37 0x00007f061553ca6a in KApplication::notify (this=0x113fcf0, receiver=0x113fcf0, event=0x12c16e0) at ../../kdeui/kernel/kapplication.cpp:311
#38 0x00007f06148788bd in QCoreApplication::notifyInternal (this=0x113fcf0, receiver=receiver@entry=0x113fcf0, event=event@entry=0x12c16e0) at kernel/qcoreapplication.cpp:946
#39 0x00007f061487be1f in sendEvent (event=0x12c16e0, receiver=0x113fcf0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#40 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x10d11f0) at kernel/qcoreapplication.cpp:1570
#41 0x00007f061487c2c3 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1463
#42 0x00007f06148a6073 in sendPostedEvents () at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:236
#43 postEventSourceDispatch (s=0x115d4c0) at kernel/qeventdispatcher_glib.cpp:279
#44 0x00007f060b03c3a6 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#45 0x00007f060b03c6f8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#46 0x00007f060b03c79c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#47 0x00007f06148a5a55 in QEventDispatcherGlib::processEvents (this=0x10d2ad0, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#48 0x00007f0613cb79d6 in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#49 0x00007f06148775ef in QEventLoop::processEvents (this=this@entry=0x7fffcb87d410, flags=...) at kernel/qeventloop.cpp:149
#50 0x00007f06148778e5 in QEventLoop::exec (this=this@entry=0x7fffcb87d410, flags=...) at kernel/qeventloop.cpp:204
#51 0x00007f061487ce5b in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1218
#52 0x00007f0613c1434c in QApplication::exec () at kernel/qapplication.cpp:3828
#53 0x00007f0617fe327c in kdemain (argc=1, argv=0x7fffcb87d668) at ../../../../plasma/desktop/shell/main.cpp:126
#54 0x00007f0617c00de5 in __libc_start_main (main=0x4006e0 <main(int, char**)>, argc=1, ubp_av=0x7fffcb87d668, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffcb87d658) at libc-start.c:260
#55 0x000000000040070e in _start ()

The reporter indicates this bug may be a duplicate of or related to bug 315414.

Possible duplicates by query: bug 326652, bug 325912, bug 325556, bug 324921, bug 322724.

Reported using DrKonqi