Application: plasma-desktop (4.11.9)
KDE Platform Version: 4.13.1
Qt Version: 4.8.6
Operating System: Linux 3.13.0-30-lowlatency i686
Distribution: Ubuntu 14.04 LTS

-- Information about the crash:
- Unusual behavior I noticed:

Everything was working pretty well.
Then I couldn't access my trashbin and decided to restart.

After that, every time after reboot, I see a black screen with mouse pointer.

Last applications I used were Google Chrome and LMMS.
Kubuntu 14.04

The crash can be reproduced every time.

-- Backtrace:
Application: Оболочка Plasma (plasma-desktop), signal: Segmentation fault
Using host libthread_db library "/lib/i386-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0xb1141a40 (LWP 2585))]

Thread 2 (Thread 0xa3b90b40 (LWP 2589)):
#0  0xb7736424 in __kernel_vsyscall ()
#1  0xb20e7d4b in pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/i386/i686/../i486/pthread_cond_wait.S:187
#2  0xb75eb8ec in __pthread_cond_wait (cond=0xb31f58d0, mutex=0xb31f58b8) at forward.c:149
#3  0xb30f2c92 in ?? () from /usr/lib/i386-linux-gnu/libQtScript.so.4
#4  0xb30f2cdf in ?? () from /usr/lib/i386-linux-gnu/libQtScript.so.4
#5  0xb20e3f70 in start_thread (arg=0xa3b90b40) at pthread_create.c:312
#6  0xb75de70e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:129

Thread 1 (Thread 0xb1141a40 (LWP 2585)):
[KCrash Handler]
#7  0xa3dc90e6 in YaWP::slotThemeChanged (this=this@entry=0x9327008) at /build/buildd/plasma-widget-yawp-0.4.2/applet/yawp.cpp:976
#8  0xa3d95344 in qt_static_metacall (_a=0xbfc0f488, _id=6, _o=0x9327008, _c=<optimized out>) at /build/buildd/plasma-widget-yawp-0.4.2/obj-i686-linux-gnu/applet/moc_yawp.cpp:71
#9  YaWP::qt_static_metacall (_o=_o@entry=0x9327008, _c=_c@entry=QMetaObject::InvokeMetaMethod, _id=6, _a=0xbfc0f488) at /build/buildd/plasma-widget-yawp-0.4.2/obj-i686-linux-gnu/applet/moc_yawp.cpp:59
#10 0xb60320f7 in QMetaObject::activate (sender=sender@entry=0x8f1add8, m=m@entry=0xb74e9798 <Plasma::Theme::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x0) at kernel/qobject.cpp:3539
#11 0xb738c345 in Plasma::Theme::themeChanged (this=0x8f1add8) at ./theme.moc:198
#12 0xb738d61c in Plasma::ThemePrivate::notifyOfChanged (this=0x8ed35e8) at ../../plasma/theme.cpp:439
#13 0xb7395ea3 in Plasma::Theme::qt_static_metacall (_o=<optimized out>, _id=<optimized out>, _a=0xbfc0f5c8, _c=<optimized out>) at ./theme.moc:101
#14 0xb60320f7 in QMetaObject::activate (sender=sender@entry=0x8fc9cb0, m=m@entry=0xb6189518 <QTimer::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x0) at kernel/qobject.cpp:3539
#15 0xb6082435 in QTimer::timeout (this=this@entry=0x8fc9cb0) at .moc/release-shared/moc_qtimer.cpp:147
#16 0xb603b926 in QTimer::timerEvent (this=0x8fc9cb0, e=0xbfc0f940) at kernel/qtimer.cpp:280
#17 0xb603655c in QObject::event (this=0x8fc9cb0, e=0xbfc0f940) at kernel/qobject.cpp:1156
#18 0xb55287f4 in QApplicationPrivate::notify_helper (this=0x8ecb878, receiver=0x8fc9cb0, e=0xbfc0f940) at kernel/qapplication.cpp:4567
#19 0xb552f2d3 in QApplication::notify (this=0x8eb8258, receiver=receiver@entry=0x8fc9cb0, e=e@entry=0xbfc0f940) at kernel/qapplication.cpp:4353
#20 0xb66911f4 in KApplication::notify (this=0x8eb8258, receiver=0x8fc9cb0, event=0xbfc0f940) at ../../kdeui/kernel/kapplication.cpp:311
#21 0xb601ce4a in QCoreApplication::notifyInternal (this=0x8eb8258, receiver=0x8fc9cb0, event=event@entry=0xbfc0f940) at kernel/qcoreapplication.cpp:953
#22 0xb604f7bb in sendEvent (event=0xbfc0f940, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#23 QTimerInfoList::activateTimers (this=this@entry=0x8eccc6c) at kernel/qeventdispatcher_unix.cpp:621
#24 0xb604c788 in timerSourceDispatch (source=0x8eccc38) at kernel/qeventdispatcher_glib.cpp:193
#25 0xb1fc71e3 in g_main_context_dispatch () from /lib/i386-linux-gnu/libglib-2.0.so.0
#26 0xb1fc7468 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#27 0xb1fc7528 in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#28 0xb604c93b in QEventDispatcherGlib::processEvents (this=this@entry=0x8e62ed0, flags=...) at kernel/qeventdispatcher_glib.cpp:434
#29 0xb55dd5de in QGuiEventDispatcherGlib::processEvents (this=0x8e62ed0, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#30 0xb601b823 in QEventLoop::processEvents (this=this@entry=0xbfc0fb78, flags=...) at kernel/qeventloop.cpp:149
#31 0xb601bb49 in QEventLoop::exec (this=this@entry=0xbfc0fb78, flags=...) at kernel/qeventloop.cpp:204
#32 0xb70c6d28 in KIO::NetAccess::enter_loop (this=this@entry=0xbfc0fbf4) at ../../kio/kio/netaccess.cpp:509
#33 0xb70c75f1 in KIO::NetAccess::statInternal (this=this@entry=0xbfc0fbf4, url=..., details=details@entry=2, side=side@entry=KIO::NetAccess::SourceSide, window=window@entry=0x0) at ../../kio/kio/netaccess.cpp:362
#34 0xb70c77b5 in KIO::NetAccess::stat (url=..., entry=..., window=window@entry=0x0) at ../../kio/kio/netaccess.cpp:228
#35 0xb70c782b in KIO::NetAccess::mostLocalUrl (url=..., window=window@entry=0x0) at ../../kio/kio/netaccess.cpp:242
#36 0xa3f8afdf in IconApplet::setUrl (this=this@entry=0x92f89e8, url=..., fromConfigDialog=fromConfigDialog@entry=false) at ../../../../../plasma/generic/applets/icon/icon.cpp:141
#37 0xa3f8ba50 in IconApplet::configChanged (this=0x92f89e8) at ../../../../../plasma/generic/applets/icon/icon.cpp:104
#38 0xa3f8a243 in IconApplet::init (this=0x92f89e8) at ../../../../../plasma/generic/applets/icon/icon.cpp:85
#39 0xb72dca46 in Plasma::ContainmentPrivate::initApplets (this=0x91b0380) at ../../plasma/containment.cpp:460
#40 0xb72eaf90 in Plasma::CoronaPrivate::importLayout (this=0x8ea9320, conf=..., mergeConfig=mergeConfig@entry=false) at ../../plasma/corona.cpp:1070
#41 0xb72eba46 in Plasma::Corona::loadLayout (this=this@entry=0x906c668, configName=...) at ../../plasma/corona.cpp:281
#42 0xb72ebb1e in Plasma::Corona::initializeLayout (this=this@entry=0x906c668, configName=...) at ../../plasma/corona.cpp:182
#43 0xb770aa72 in PlasmaApp::corona (this=this@entry=0x8eb8258, createIfMissing=createIfMissing@entry=true) at ../../../../plasma/desktop/shell/plasmaapp.cpp:856
#44 0xb770b09a in PlasmaApp::setupDesktop (this=0x8eb8258) at ../../../../plasma/desktop/shell/plasmaapp.cpp:314
#45 0xb770fb18 in PlasmaApp::qt_static_metacall (_o=<optimized out>, _id=<optimized out>, _a=0x8ed4340, _c=<optimized out>) at ./plasmaapp.moc:128
#46 0xb602e8aa in QMetaCallEvent::placeMetaCall (this=0x8f860c0, object=0x8eb8258) at kernel/qobject.cpp:524
#47 0xb60366fb in QObject::event (this=this@entry=0x8eb8258, e=e@entry=0x8f860c0) at kernel/qobject.cpp:1194
#48 0xb6021a9a in QCoreApplication::event (this=0x8eb8258, e=0x8f860c0) at kernel/qcoreapplication.cpp:1765
#49 0xb552dd0f in QApplication::event (this=0x8eb8258, e=0x8f860c0) at kernel/qapplication.cpp:2549
#50 0xb55287f4 in QApplicationPrivate::notify_helper (this=0x8ecb878, receiver=0x8eb8258, e=0x8f860c0) at kernel/qapplication.cpp:4567
#51 0xb552f2d3 in QApplication::notify (this=0x8eb8258, receiver=receiver@entry=0x8eb8258, e=e@entry=0x8f860c0) at kernel/qapplication.cpp:4353
#52 0xb66911f4 in KApplication::notify (this=0x8eb8258, receiver=0x8eb8258, event=0x8f860c0) at ../../kdeui/kernel/kapplication.cpp:311
#53 0xb601ce4a in QCoreApplication::notifyInternal (this=0x8eb8258, receiver=receiver@entry=0x8eb8258, event=event@entry=0x8f860c0) at kernel/qcoreapplication.cpp:953
#54 0xb602070d in sendEvent (event=0x8f860c0, receiver=0x8eb8258) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#55 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x8e62130) at kernel/qcoreapplication.cpp:1577
#56 0xb6020c1c in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1470
#57 0xb604d23e in sendPostedEvents () at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:236
#58 postEventSourceDispatch (s=0x8ecb6a0) at kernel/qeventdispatcher_glib.cpp:287
#59 0xb1fc71e3 in g_main_context_dispatch () from /lib/i386-linux-gnu/libglib-2.0.so.0
#60 0xb1fc7468 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#61 0xb1fc7528 in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#62 0xb604c93b in QEventDispatcherGlib::processEvents (this=this@entry=0x8e62ed0, flags=...) at kernel/qeventdispatcher_glib.cpp:434
#63 0xb55dd5de in QGuiEventDispatcherGlib::processEvents (this=0x8e62ed0, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#64 0xb601b823 in QEventLoop::processEvents (this=this@entry=0xbfc10718, flags=...) at kernel/qeventloop.cpp:149
#65 0xb601bb49 in QEventLoop::exec (this=this@entry=0xbfc10718, flags=...) at kernel/qeventloop.cpp:204
#66 0xb60218fe in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1225
#67 0xb5526a24 in QApplication::exec () at kernel/qapplication.cpp:3828
#68 0xb76f2d27 in kdemain (argc=1, argv=0xbfc108b4) at ../../../../plasma/desktop/shell/main.cpp:126
#69 0x0804855b in main (argc=1, argv=0xbfc108b4) at plasma-desktop_dummy.cpp:3

Possible duplicates by query: bug 327825, bug 317417, bug 314230, bug 302721.

Reported using DrKonqi