Application: systemsettings5 (5.5.5)

Qt Version: 5.5.1
Operating System: Linux 4.4.0-75-generic x86_64
Distribution: Ubuntu 16.04.2 LTS

-- Information about the crash:
- What I was doing when the application crashed:
Open system Setting -> open anything else in it like Design, Color, Mltimedia etc
- Unusual behavior I noticed:
Loockscreen dosn't work

The crash can be reproduced every time.

-- Backtrace:
Application: Systemeinstellungen (systemsettings5), signal: Aborted
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f1c977838c0 (LWP 24860))]

Thread 3 (Thread 0x7f1c75b6e700 (LWP 24867)):
#0  0x00007f1c93e9c24d in read () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f1c90e336f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f1c90defe74 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f1c90df0330 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f1c90df049c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f1c947cd7eb in QEventDispatcherGlib::processEvents (this=0x7f1c700008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#6  0x00007f1c94774b4a in QEventLoop::exec (this=this@entry=0x7f1c75b6dce0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#7  0x00007f1c94591834 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#8  0x00007f1c92f0f3c5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#9  0x00007f1c945967be in QThreadPrivate::start (arg=0x10caf80) at thread/qthread_unix.cpp:331
#10 0x00007f1c913116ba in start_thread (arg=0x7f1c75b6e700) at pthread_create.c:333
#11 0x00007f1c93eac3dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7f1c86d81700 (LWP 24861)):
#0  0x00007f1c93ea070d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007f1c91b87c62 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f1c91b898d7 in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f1c89705889 in QXcbEventReader::run (this=0xc37d60) at qxcbconnection.cpp:1271
#4  0x00007f1c945967be in QThreadPrivate::start (arg=0xc37d60) at thread/qthread_unix.cpp:331
#5  0x00007f1c913116ba in start_thread (arg=0x7f1c86d81700) at pthread_create.c:333
#6  0x00007f1c93eac3dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7f1c977838c0 (LWP 24860)):
[KCrash Handler]
#6  0x00007f1c93dda428 in __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:54
#7  0x00007f1c93ddc02a in __GI_abort () at abort.c:89
#8  0x00007f1c94583f81 in qt_message_fatal (context=..., message=<synthetic pointer>) at global/qlogging.cpp:1578
#9  QMessageLogger::fatal (this=<optimized out>, msg=<optimized out>) at global/qlogging.cpp:781
#10 0x00007f1c931c7af1 in QSGRenderLoop::handleContextCreationFailure(QQuickWindow*, bool) () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#11 0x00007f1c931d0332 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#12 0x00007f1c931d0733 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#13 0x00007f1c956a22b5 in QWindow::event (this=0x116f520, ev=<optimized out>) at kernel/qwindow.cpp:2060
#14 0x00007f1c93203871 in QQuickWindow::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#15 0x00007f1c95c4a05c in QApplicationPrivate::notify_helper (this=this@entry=0xc1b2e0, receiver=receiver@entry=0x116f520, e=e@entry=0x7ffc10434200) at kernel/qapplication.cpp:3716
#16 0x00007f1c95c4f516 in QApplication::notify (this=0x7ffc104345e0, receiver=0x116f520, e=0x7ffc10434200) at kernel/qapplication.cpp:3499
#17 0x00007f1c9477738b in QCoreApplication::notifyInternal (this=0x7ffc104345e0, receiver=receiver@entry=0x116f520, event=event@entry=0x7ffc10434200) at kernel/qcoreapplication.cpp:965
#18 0x00007f1c9569a4ac in QCoreApplication::sendSpontaneousEvent (event=0x7ffc10434200, receiver=0x116f520) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:227
#19 QGuiApplicationPrivate::processExposeEvent (e=0x1074f30) at kernel/qguiapplication.cpp:2663
#20 0x00007f1c9569b21d in QGuiApplicationPrivate::processWindowSystemEvent (e=e@entry=0x1074f30) at kernel/qguiapplication.cpp:1658
#21 0x00007f1c9567ef08 in QWindowSystemInterface::sendWindowSystemEvents (flags=...) at kernel/qwindowsysteminterface.cpp:625
#22 0x00007f1c89737200 in userEventSourceDispatch (source=<optimized out>) at eventdispatchers/qeventdispatcher_glib.cpp:70
#23 0x00007f1c90df0197 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007f1c90df03f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#25 0x00007f1c90df049c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#26 0x00007f1c947cd7cf in QEventDispatcherGlib::processEvents (this=0xc6cde0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#27 0x00007f1c94774b4a in QEventLoop::exec (this=this@entry=0x7ffc104344c0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#28 0x00007f1c9477cbec in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1229
#29 0x000000000040f7a1 in main ()

Possible duplicates by query: bug 379557, bug 377996, bug 371459.

Reported using DrKonqi