Application: plasmashell (5.5.5)

Qt Version: 5.5.1
Operating System: Linux 4.4.5-300.fc23.x86_64 x86_64
Distribution (Platform): Fedora RPMs

-- Information about the crash:
After some inactivity, my monitor on my desktop initiates the powersave feature and turns off the screen to conserve power. Whenever I return and login, plasma has crashed along with ksm server and a bunch of other services.

The crash can be reproduced every time.

-- Backtrace:
Application: Plasma (plasmashell), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
84	T_PSEUDO (SYSCALL_SYMBOL, SYSCALL_NAME, SYSCALL_NARGS)
[Current thread is 1 (Thread 0x7f4c27f15940 (LWP 16973))]

Thread 7 (Thread 0x7f4c074b5700 (LWP 16985)):
#0  0x00007f4c1f8ecfdd in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f4c25da7272 in _xcb_conn_wait (__timeout=-1, __nfds=1, __fds=0x7f4c074b4b80) at /usr/include/bits/poll2.h:46
#2  0x00007f4c25da7272 in _xcb_conn_wait (c=c@entry=0x562fe55c8080, cond=cond@entry=0x562fe55c80c0, vector=vector@entry=0x0, count=count@entry=0x0) at xcb_conn.c:459
#3  0x00007f4c25da8ee7 in xcb_wait_for_event (c=0x562fe55c8080) at xcb_in.c:693
#4  0x00007f4c09ddfda9 in QXcbEventReader::run() (this=0x562fe55d2250) at qxcbconnection.cpp:1255
#5  0x00007f4c204f53de in QThreadPrivate::start(void*) (arg=0x562fe55d2250) at thread/qthread_unix.cpp:331
#6  0x00007f4c1ec3060a in start_thread (arg=0x7f4c074b5700) at pthread_create.c:334
#7  0x00007f4c1f8f8a4d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7f4c04a64700 (LWP 16995)):
#0  0x00007f4c1f8ecfdd in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f4c1ae1016c in g_main_context_iterate (priority=2147483647, n_fds=1, fds=0x7f4bf8003070, timeout=<optimized out>, context=0x7f4bf8000990) at gmain.c:4135
#2  0x00007f4c1ae1016c in g_main_context_iterate (context=context@entry=0x7f4bf8000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3835
#3  0x00007f4c1ae1027c in g_main_context_iteration (context=0x7f4bf8000990, may_block=may_block@entry=1) at gmain.c:3901
#4  0x00007f4c2072cecb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f4bf80008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#5  0x00007f4c206d3eca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f4c04a63c60, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f4c204f0434 in QThread::exec() (this=this@entry=0x562fe56a05f0) at thread/qthread.cpp:503
#7  0x00007f4c2483e9b5 in QQmlThreadPrivate::run() (this=0x562fe56a05f0) at /usr/src/debug/qtdeclarative-opensource-src-5.5.1/src/qml/qml/ftw/qqmlthread.cpp:141
#8  0x00007f4c204f53de in QThreadPrivate::start(void*) (arg=0x562fe56a05f0) at thread/qthread_unix.cpp:331
#9  0x00007f4c1ec3060a in start_thread (arg=0x7f4c04a64700) at pthread_create.c:334
#10 0x00007f4c1f8f8a4d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7f4bfcc38700 (LWP 17001)):
#0  0x00007f4c1f8ecfdd in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f4c1ae1016c in g_main_context_iterate (priority=2147483647, n_fds=1, fds=0x7f4bf0002e70, timeout=<optimized out>, context=0x7f4bf0000990) at gmain.c:4135
#2  0x00007f4c1ae1016c in g_main_context_iterate (context=context@entry=0x7f4bf0000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3835
#3  0x00007f4c1ae1027c in g_main_context_iteration (context=0x7f4bf0000990, may_block=may_block@entry=1) at gmain.c:3901
#4  0x00007f4c2072cecb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f4bf00008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#5  0x00007f4c206d3eca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f4bfcc37c60, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f4c204f0434 in QThread::exec() (this=this@entry=0x562fe58ff560) at thread/qthread.cpp:503
#7  0x00007f4c2483e9b5 in QQmlThreadPrivate::run() (this=0x562fe58ff560) at /usr/src/debug/qtdeclarative-opensource-src-5.5.1/src/qml/qml/ftw/qqmlthread.cpp:141
#8  0x00007f4c204f53de in QThreadPrivate::start(void*) (arg=0x562fe58ff560) at thread/qthread_unix.cpp:331
#9  0x00007f4c1ec3060a in start_thread (arg=0x7f4bfcc38700) at pthread_create.c:334
#10 0x00007f4c1f8f8a4d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7f4bf5428700 (LWP 17030)):
#0  0x00007f4c1f8ecfdd in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f4c1ae1016c in g_main_context_iterate (priority=2147483647, n_fds=1, fds=0x7f4be8003070, timeout=<optimized out>, context=0x7f4be8000990) at gmain.c:4135
#2  0x00007f4c1ae1016c in g_main_context_iterate (context=context@entry=0x7f4be8000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3835
#3  0x00007f4c1ae1027c in g_main_context_iteration (context=0x7f4be8000990, may_block=may_block@entry=1) at gmain.c:3901
#4  0x00007f4c2072cecb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f4be80008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#5  0x00007f4c206d3eca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f4bf5427c60, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#6  0x00007f4c204f0434 in QThread::exec() (this=this@entry=0x562fe5a503b0) at thread/qthread.cpp:503
#7  0x00007f4c2483e9b5 in QQmlThreadPrivate::run() (this=0x562fe5a503b0) at /usr/src/debug/qtdeclarative-opensource-src-5.5.1/src/qml/qml/ftw/qqmlthread.cpp:141
#8  0x00007f4c204f53de in QThreadPrivate::start(void*) (arg=0x562fe5a503b0) at thread/qthread_unix.cpp:331
#9  0x00007f4c1ec3060a in start_thread (arg=0x7f4bf5428700) at pthread_create.c:334
#10 0x00007f4c1f8f8a4d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7f4bef9cd700 (LWP 17052)):
#0  0x00007f4c1ec35b10 in pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007f4c27697514 in QTWTF::TCMalloc_PageHeap::scavengerThread() (this=0x7f4c27980380 <QTWTF::pageheap_memory>) at /usr/src/debug/qtscript-opensource-src-5.5.1/src/3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:2359
#2  0x00007f4c27697559 in QTWTF::TCMalloc_PageHeap::runScavengerThread(void*) (context=<optimized out>) at /usr/src/debug/qtscript-opensource-src-5.5.1/src/3rdparty/javascriptcore/JavaScriptCore/wtf/FastMalloc.cpp:1464
#3  0x00007f4c1ec3060a in start_thread (arg=0x7f4bef9cd700) at pthread_create.c:334
#4  0x00007f4c1f8f8a4d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f4b5be5c700 (LWP 17240)):
#0  0x00007f4c1ae0f81c in g_main_context_prepare (context=context@entry=0x7f4b54000990, priority=priority@entry=0x7f4b5be5bb10) at gmain.c:3453
#1  0x00007f4c1ae1009b in g_main_context_iterate (context=context@entry=0x7f4b54000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3820
#2  0x00007f4c1ae1027c in g_main_context_iteration (context=0x7f4b54000990, may_block=may_block@entry=1) at gmain.c:3901
#3  0x00007f4c2072cecb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f4b540008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x00007f4c206d3eca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f4b5be5bc40, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007f4c204f0434 in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007f4b5da98547 in KCupsConnection::run() () at /lib64/libkcupslib.so
#7  0x00007f4c204f53de in QThreadPrivate::start(void*) (arg=0x562fe7fed0c0) at thread/qthread_unix.cpp:331
#8  0x00007f4c1ec3060a in start_thread (arg=0x7f4b5be5c700) at pthread_create.c:334
#9  0x00007f4c1f8f8a4d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f4c27f15940 (LWP 16973)):
[KCrash Handler]
#6  0x00007f4c09df055c in QXcbScreen::mapFromNative(QPoint const&) const (this=0x0, pos=...) at qxcbscreen.cpp:249
#7  0x00007f4c09df89ba in QXcbWindow::handleEnterNotifyEvent(xcb_enter_notify_event_t const*) (this=0x562fe76f6300, event=<optimized out>) at qxcbwindow.cpp:2329
#8  0x00007f4c09de1afd in QXcbConnection::handleXcbEvent(xcb_generic_event_t*) (this=this@entry=0x562fe55c68e0, event=event@entry=0x7f4c00003460) at qxcbconnection.cpp:1084
#9  0x00007f4c09de2433 in QXcbConnection::processXcbEvents() (this=0x562fe55c68e0) at qxcbconnection.cpp:1528
#10 0x00007f4c20706161 in QObject::event(QEvent*) (this=0x562fe55c68e0, e=<optimized out>) at kernel/qobject.cpp:1239
#11 0x00007f4c21c8a41c in QApplicationPrivate::notify_helper(QObject*, QEvent*) (this=this@entry=0x562fe55b94e0, receiver=receiver@entry=0x562fe55c68e0, e=e@entry=0x7f4c00006180) at kernel/qapplication.cpp:3716
#12 0x00007f4c21c8f8e6 in QApplication::notify(QObject*, QEvent*) (this=0x7ffe3dc94570, receiver=0x562fe55c68e0, e=0x7f4c00006180) at kernel/qapplication.cpp:3499
#13 0x00007f4c206d673b in QCoreApplication::notifyInternal(QObject*, QEvent*) (this=0x7ffe3dc94570, receiver=0x562fe55c68e0, event=event@entry=0x7f4c00006180) at kernel/qcoreapplication.cpp:965
#14 0x00007f4c206d8b36 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) (event=0x7f4c00006180, receiver=<optimized out>) at kernel/qcoreapplication.h:224
#15 0x00007f4c206d8b36 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x562fe55af550) at kernel/qcoreapplication.cpp:1593
#16 0x00007f4c206d9018 in QCoreApplication::sendPostedEvents(QObject*, int) (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1451
#17 0x00007f4c2072caa3 in postEventSourceDispatch(GSource*, GSourceFunc, gpointer) (s=0x562fe55efa40) at kernel/qeventdispatcher_glib.cpp:271
#18 0x00007f4c1ae0fe3a in g_main_context_dispatch (context=0x7f4c000016f0) at gmain.c:3154
#19 0x00007f4c1ae0fe3a in g_main_context_dispatch (context=context@entry=0x7f4c000016f0) at gmain.c:3769
#20 0x00007f4c1ae101d0 in g_main_context_iterate (context=context@entry=0x7f4c000016f0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3840
#21 0x00007f4c1ae1027c in g_main_context_iteration (context=0x7f4c000016f0, may_block=may_block@entry=1) at gmain.c:3901
#22 0x00007f4c2072ceaf in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x562fe55fbcb0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#23 0x00007f4c206d3eca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7ffe3dc94410, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#24 0x00007f4c206dbfac in QCoreApplication::exec() () at kernel/qcoreapplication.cpp:1229
#25 0x0000562fe458108a in main(int, char**) (argc=2, argv=<optimized out>) at /usr/src/debug/plasma-workspace-5.5.5/shell/main.cpp:181

Possible duplicates by query: bug 360873, bug 360078, bug 359799, bug 358370, bug 356408.

Reported using DrKonqi