I was trying to wake up the system from sleep mode. On first look desktop appeared, mouse coursor was moving, but:
- nothing react to clicking / draging / hover etc. 
- keyboard was not reacting ("num lock" key didn't change num lock light)
Then plasma crashed and I was switched to terrible malformed ubuntu login screen.

Reproducible: Always

Steps to Reproduce:
1. Put system into "sleep" mode
2. Wake it up

Actual Results:  
Plasma (and whole system) crashes. A restart is required

Expected Results:  
Plasma wakes up and is stable

KDE critical errors report:
Application: plasma-desktop (4.11.11)
KDE Platform Version: 4.13.3
Qt Version: 4.8.6
Operating System: Linux 3.13.0-37-generic x86_64
Distribution: Ubuntu 14.04.1 LTS

-- Information about the crash:
- What I was doing when the application crashed:
I was trying to wake up the system from sleep mode. On first look desktop appeared, mouse coursor was moving, but nothing react to clicking / draging etc. Then plasma crashed and I was switched to terrible malformed kubuntu login screen.

The crash can be reproduced every time.

-- Backtrace:
Application: Powłoka pulpitu Plazmy (plasma-desktop), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f17bea5d7c0 (LWP 2300))]

Thread 5 (Thread 0x7f1790bd5700 (LWP 2307)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f17b7702ffb in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#2  0x00007f17b7703039 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#3  0x00007f17b1fae182 in start_thread (arg=0x7f1790bd5700) at pthread_create.c:312
#4  0x00007f17be34ffbd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 4 (Thread 0x7f1702810700 (LWP 2309)):
#0  0x00007f17b18de9b0 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f17b189ca59 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f17b189cf7b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f17b189d0ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f17baf187be in QEventDispatcherGlib::processEvents (this=0x7f16fc0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:436
#5  0x00007f17baeea0af in QEventLoop::processEvents (this=this@entry=0x7f170280fde0, flags=...) at kernel/qeventloop.cpp:149
#6  0x00007f17baeea3a5 in QEventLoop::exec (this=this@entry=0x7f170280fde0, flags=...) at kernel/qeventloop.cpp:204
#7  0x00007f17bade6c5f in QThread::exec (this=this@entry=0x282e650) at thread/qthread.cpp:537
#8  0x00007f17baecb823 in QInotifyFileSystemWatcherEngine::run (this=0x282e650) at io/qfilesystemwatcher_inotify.cpp:265
#9  0x00007f17bade932f in QThreadPrivate::start (arg=0x282e650) at thread/qthread_unix.cpp:349
#10 0x00007f17b1fae182 in start_thread (arg=0x7f1702810700) at pthread_create.c:312
#11 0x00007f17be34ffbd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 3 (Thread 0x7f16fbfff700 (LWP 2311)):
#0  0x00007f17b1fb0569 in __GI___pthread_mutex_lock (mutex=0x7f16f4000a60) at ../nptl/pthread_mutex_lock.c:125
#1  0x00007f17b18de991 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f17b189cf99 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f17b189d0ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f17baf187be in QEventDispatcherGlib::processEvents (this=0x7f16f40008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:436
#5  0x00007f17baeea0af in QEventLoop::processEvents (this=this@entry=0x7f16fbffede0, flags=...) at kernel/qeventloop.cpp:149
#6  0x00007f17baeea3a5 in QEventLoop::exec (this=this@entry=0x7f16fbffede0, flags=...) at kernel/qeventloop.cpp:204
#7  0x00007f17bade6c5f in QThread::exec (this=this@entry=0x2999850) at thread/qthread.cpp:537
#8  0x00007f17baecb823 in QInotifyFileSystemWatcherEngine::run (this=0x2999850) at io/qfilesystemwatcher_inotify.cpp:265
#9  0x00007f17bade932f in QThreadPrivate::start (arg=0x2999850) at thread/qthread_unix.cpp:349
#10 0x00007f17b1fae182 in start_thread (arg=0x7f16fbfff700) at pthread_create.c:312
#11 0x00007f17be34ffbd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 2 (Thread 0x7f16f24c1700 (LWP 2314)):
#0  0x00007f17be342c6d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007f17b189cfe4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f17b189d0ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f17baf187be in QEventDispatcherGlib::processEvents (this=0x7f16ec0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:436
#4  0x00007f17baeea0af in QEventLoop::processEvents (this=this@entry=0x7f16f24c0de0, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007f17baeea3a5 in QEventLoop::exec (this=this@entry=0x7f16f24c0de0, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007f17bade6c5f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:537
#7  0x00007f16f90c5027 in KCupsConnection::run() () from /usr/lib/libkcupslib.so
#8  0x00007f17bade932f in QThreadPrivate::start (arg=0x34323b0) at thread/qthread_unix.cpp:349
#9  0x00007f17b1fae182 in start_thread (arg=0x7f16f24c1700) at pthread_create.c:312
#10 0x00007f17be34ffbd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 1 (Thread 0x7f17bea5d7c0 (LWP 2300)):
[KCrash Handler]
#6  0x00007f17baf02d42 in QMetaObject::addGuard (ptr=ptr@entry=0x7fff9dd9faf0) at kernel/qobject.cpp:400
#7  0x00007f17bcb03f25 in QPointer (p=..., this=0x7fff9dd9faf0) at ../../include/QtCore/../../src/corelib/kernel/qpointer.h:62
#8  takeAt (i=2, this=0x2b62390) at ../../include/QtCore/../../src/corelib/tools/qlist.h:486
#9  QDeclarativeRepeater::itemsRemoved (this=0x2b67ac0, index=2, count=0) at graphicsitems/qdeclarativerepeater.cpp:407
#10 0x00007f17baeff87a in QMetaObject::activate (sender=sender@entry=0x297e7c0, m=m@entry=0x7f17bcf38a40 <QDeclarativeVisualModel::staticMetaObject>, local_signal_index=local_signal_index@entry=2, argv=argv@entry=0x7fff9dd9fc50) at kernel/qobject.cpp:3539
#11 0x00007f17bcc4543f in QDeclarativeVisualModel::itemsRemoved (this=this@entry=0x297e7c0, _t1=_t1@entry=2, _t2=_t2@entry=1) at .moc/release-shared/moc_qdeclarativevisualitemmodel_p.cpp:160
#12 0x00007f17bcb1906b in QDeclarativeVisualDataModel::_q_itemsRemoved (this=0x297e7c0, index=2, count=1) at graphicsitems/qdeclarativevisualitemmodel.cpp:1314
#13 0x00007f17bcc4584d in QDeclarativeVisualDataModel::qt_static_metacall (_o=0x7fff9dd9faf0, _c=QMetaObject::WriteProperty, _id=29670560, _a=0x1) at .moc/release-shared/moc_qdeclarativevisualitemmodel_p.cpp:403
#14 0x00007f17baeff87a in QMetaObject::activate (sender=sender@entry=0x29a09b0, m=m@entry=0x7f17bb24f6a0 <QAbstractItemModel::staticMetaObject>, local_signal_index=local_signal_index@entry=7, argv=argv@entry=0x7fff9dd9fe90) at kernel/qobject.cpp:3539
#15 0x00007f17baf49704 in QAbstractItemModel::rowsRemoved (this=this@entry=0x29a09b0, _t1=..., _t2=2, _t3=2) at .moc/release-shared/moc_qabstractitemmodel.cpp:210
#16 0x00007f17baee673e in QAbstractItemModel::endRemoveRows (this=0x29a09b0) at kernel/qabstractitemmodel.cpp:2487
#17 0x00007f17948d8c5c in itemRemoved (item=<optimized out>, this=<optimized out>) at ../../../libs/taskmanager/tasksmodel.cpp:502
#18 TaskManager::TasksModel::qt_static_metacall (_o=0x7fff9dd9faf0, _id=2, _a=0x7fff9dda0080, _c=<optimized out>) at ./tasksmodel.moc:133
#19 0x00007f17baeff87a in QMetaObject::activate (sender=0x2151f20, m=m@entry=0x7f1794af51e0 <TaskManager::TaskGroup::staticMetaObject>, local_signal_index=local_signal_index@entry=3, argv=argv@entry=0x7fff9dda0080) at kernel/qobject.cpp:3539
#20 0x00007f17948cba72 in TaskManager::TaskGroup::itemRemoved (this=<optimized out>, _t1=0x5d62640) at ./taskgroup.moc:200
#21 0x00007f17948cbe13 in TaskManager::TaskGroup::Private::signalRemovals (this=0x295db70) at ../../../libs/taskmanager/taskgroup.cpp:276
#22 0x00007f17948ce5a9 in TaskManager::TaskGroup::qt_static_metacall (_o=<optimized out>, _id=<optimized out>, _a=<optimized out>, _c=<optimized out>) at ./taskgroup.moc:130
#23 0x00007f17baf03c1e in QObject::event (this=0x2151f20, e=<optimized out>) at kernel/qobject.cpp:1194
#24 0x00007f17ba284e2c in QApplicationPrivate::notify_helper (this=this@entry=0x1aed010, receiver=receiver@entry=0x2151f20, e=e@entry=0x5cd7d40) at kernel/qapplication.cpp:4567
#25 0x00007f17ba28b4a0 in QApplication::notify (this=this@entry=0x1ad7240, receiver=receiver@entry=0x2151f20, e=e@entry=0x5cd7d40) at kernel/qapplication.cpp:4353
#26 0x00007f17bbbb0d1a in KApplication::notify (this=0x1ad7240, receiver=0x2151f20, event=0x5cd7d40) at ../../kdeui/kernel/kapplication.cpp:311
#27 0x00007f17baeeb4dd in QCoreApplication::notifyInternal (this=0x1ad7240, receiver=receiver@entry=0x2151f20, event=event@entry=0x5cd7d40) at kernel/qcoreapplication.cpp:953
#28 0x00007f17baeeeb3d in sendEvent (event=0x5cd7d40, receiver=0x2151f20) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#29 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x1a511f0) at kernel/qcoreapplication.cpp:1577
#30 0x00007f17baeeefe3 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1470
#31 0x00007f17baf18f83 in sendPostedEvents () at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:236
#32 postEventSourceDispatch (s=0x1aeacd0) at kernel/qeventdispatcher_glib.cpp:287
#33 0x00007f17b189ce04 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#34 0x00007f17b189d048 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#35 0x00007f17b189d0ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#36 0x00007f17baf187a1 in QEventDispatcherGlib::processEvents (this=0x1a52af0, flags=...) at kernel/qeventdispatcher_glib.cpp:434
#37 0x00007f17ba326bb6 in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#38 0x00007f17baeea0af in QEventLoop::processEvents (this=this@entry=0x7fff9dda0700, flags=...) at kernel/qeventloop.cpp:149
#39 0x00007f17baeea3a5 in QEventLoop::exec (this=this@entry=0x7fff9dda0700, flags=...) at kernel/qeventloop.cpp:204
#40 0x00007f17baeefb79 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1225
#41 0x00007f17ba28337c in QApplication::exec () at kernel/qapplication.cpp:3828
#42 0x00007f17be65767c in kdemain (argc=1, argv=0x7fff9dda0958) at ../../../../plasma/desktop/shell/main.cpp:126
#43 0x00007f17be276ec5 in __libc_start_main (main=0x4006e0 <main(int, char**)>, argc=1, argv=0x7fff9dda0958, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff9dda0948) at libc-start.c:287
#44 0x000000000040070e in _start ()

Possible duplicates by query: bug 332321, bug 330627, bug 330625, bug 327250, bug 326914.

Wyślij zgłoszenie do https://bugs.kde.org/