Bug 379578

Application: systemsettings5 (5.8.6)

Qt Version: 5.7.1
Frameworks Version: 5.33.0
Operating System: Linux 4.8.0-51-generic x86_64
Distribution: KDE neon LTS User Edition 5.8

-- Information about the crash:
Just freshly installed a KDE neon user LTS edition and started configuring Plasma to my liking.
As the title says, everytime I click "Login Screen (SDDM)" under "Startup and Shutdown" System Settings crashes.

The crash can be reproduced every time.

-- Backtrace:
Application: System Settings (systemsettings5), signal: Aborted
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fab7f3dd900 (LWP 16123))]

Thread 6 (Thread 0x7fab496a7700 (LWP 21983)):
#0  0x00007fab76b7aa28 in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fab76b7b2bb in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fab76b7b49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fab7c42075b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fab7c3cb0ba in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fab7c1faf64 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fab7ab55bf5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007fab7c1ffb48 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fab78d0e6ba in start_thread (arg=0x7fab496a7700) at pthread_create.c:333
#9  0x00007fab7bb0c82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7fab4a0b7700 (LWP 21982)):
#0  0x00007fab7bb00b5d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fab76b7b38c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fab76b7b712 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fab4a3a09d6 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#4  0x00007fab76ba1bb5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fab78d0e6ba in start_thread (arg=0x7fab4a0b7700) at pthread_create.c:333
#6  0x00007fab7bb0c82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7fab514d7700 (LWP 21981)):
#0  0x00007fab7bb00b5d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fab76b7b38c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fab76b7b49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fab76b7b4d9 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fab76ba1bb5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fab78d0e6ba in start_thread (arg=0x7fab514d7700) at pthread_create.c:333
#6  0x00007fab7bb0c82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7fab6393e700 (LWP 16270)):
#0  0x00007fab7bafc69d in read () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fab747bcf55 in ?? () from /usr/lib/nvidia-340/tls/libnvidia-tls.so.340.102
#2  0x00007fab76bbe6f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fab76b7ae74 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fab76b7b330 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fab76b7b49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007fab7c42075b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fab7c3cb0ba in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fab7c1faf64 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007fab7f530735 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#10 0x00007fab7c1ffb48 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x00007fab78d0e6ba in start_thread (arg=0x7fab6393e700) at pthread_create.c:333
#12 0x00007fab7bb0c82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7fab6c386700 (LWP 16217)):
#0  0x00007fab7bb00b5d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fab79584c62 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007fab795868d7 in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007fab6ef0fd79 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007fab7c1ffb48 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fab78d0e6ba in start_thread (arg=0x7fab6c386700) at pthread_create.c:333
#6  0x00007fab7bb0c82d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7fab7f3dd900 (LWP 16123)):
[KCrash Handler]
#6  0x00007fab7ba3b428 in __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:54
#7  0x00007fab7ba3d02a in __GI_abort () at abort.c:89
#8  0x00007fab7c1e6811 in QMessageLogger::fatal(char const*, ...) const () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007fab7f50f577 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5QuickWidgets.so.5
#10 0x00007fab7f50f8ca in ?? () from /usr/lib/x86_64-linux-gnu/libQt5QuickWidgets.so.5
#11 0x00007fab7f510735 in QQuickWidget::resizeEvent(QResizeEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5QuickWidgets.so.5
#12 0x00007fab7d8ed3ce in QWidget::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#13 0x00007fab7d8a5ecc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#14 0x00007fab7d8ad8c6 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#15 0x00007fab7c3cd0c8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#16 0x00007fab7d8e5d12 in QWidgetPrivate::sendPendingMoveAndResizeEvents(bool, bool) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#17 0x00007fab7d8e9af3 in QWidgetPrivate::show_helper() () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#18 0x00007fab7d8ec90d in QWidget::setVisible(bool) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#19 0x00007fab7d8e9a88 in QWidgetPrivate::showChildren(bool) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#20 0x00007fab7d8e9b0f in QWidgetPrivate::show_helper() () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#21 0x00007fab7d8e9a77 in QWidgetPrivate::showChildren(bool) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#22 0x00007fab7d8e9b0f in QWidgetPrivate::show_helper() () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#23 0x00007fab7d8e9a77 in QWidgetPrivate::showChildren(bool) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#24 0x00007fab7d8e9b0f in QWidgetPrivate::show_helper() () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#25 0x00007fab7d8ec90d in QWidget::setVisible(bool) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#26 0x00007fab7d8e9a88 in QWidgetPrivate::showChildren(bool) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#27 0x00007fab7d8e9b0f in QWidgetPrivate::show_helper() () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#28 0x00007fab7d8ec90d in QWidget::setVisible(bool) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#29 0x00007fab7d8e9a88 in QWidgetPrivate::showChildren(bool) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#30 0x00007fab7d8e9b0f in QWidgetPrivate::show_helper() () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#31 0x00007fab7d8ec90d in QWidget::setVisible(bool) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#32 0x00007fab7d8ebf89 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#33 0x00007fab7c3f8d99 in QObject::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#34 0x00007fab7d8ed12b in QWidget::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#35 0x00007fab7d8a5ecc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#36 0x00007fab7d8ad8c6 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#37 0x00007fab7c3cd0c8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#38 0x00007fab7c3cf78b in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#39 0x00007fab7c420333 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#40 0x00007fab76b7b197 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#41 0x00007fab76b7b3f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#42 0x00007fab76b7b49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#43 0x00007fab7c42073f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#44 0x00007fab7c3cb0ba in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#45 0x00007fab7c3d36cc in QCoreApplication::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#46 0x000000000040c110 in ?? ()
#47 0x00007fab7ba26830 in __libc_start_main (main=0x40bd20, argc=1, argv=0x7ffcdceb98e8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffcdceb98d8) at ../csu/libc-start.c:291
#48 0x000000000040c189 in _start ()

Possible duplicates by query: bug 379557, bug 378589, bug 378240, bug 377996, bug 377986.

Reported using DrKonqi