Application: systemsettings5 (5.12.6)
 (Compiled from sources)
Qt Version: 5.9.5
Frameworks Version: 5.44.0
Operating System: Linux 4.15.0-36-generic x86_64
Distribution: Ubuntu 18.04.1 LTS

-- Information about the crash:
- What I was doing when the application crashed:I was listening to Spotify (installed from Spotify repo) and was about to change the sound from a bluetooth headset to HDMI out on my Nvidia GPU. 

- Unusual behavior I noticed: I use a dual monitor setup (Samsung 32" Tv-HDMI) and (HP w1707 monitor-DVI). When I powered up and logged in, I started geting random flickering and black squares on both monitors. I had just installed the new Nvidia-410 driver and depend packages. I was going to listen to a couple songs and then reboot.

-- 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 0x7f3a2233c800 (LWP 8987))]

Thread 4 (Thread 0x7f39f3e19700 (LWP 8996)):
#0  0x00007f3a1dd9fbf9 in __GI___poll (fds=0x7f39ec004a00, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f3a17c03439 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f3a17c0354c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f3a1e6e890b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f3a1e68d9ea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f3a1e4ac22a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f3a1c0016f5 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f3a1e4b116d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f3a19f536db in start_thread (arg=0x7f39f3e19700) at pthread_create.c:463
#9  0x00007f3a1ddac88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7f3a01407700 (LWP 8990)):
#0  0x00007f3a1dd9b0b4 in __GI___libc_read (fd=7, buf=0x7f3a01406b60, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:27
#1  0x00007f3a17c47a00 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f3a17c02f27 in g_main_context_check () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f3a17c033e0 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f3a17c0354c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f3a1e6e890b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f3a1e68d9ea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f3a1e4ac22a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f3a1fff2d45 in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#9  0x00007f3a1e4b116d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007f3a19f536db in start_thread (arg=0x7f3a01407700) at pthread_create.c:463
#11 0x00007f3a1ddac88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7f3a0f401700 (LWP 8989)):
#0  0x00007f3a1dd9fbf9 in __GI___poll (fds=0x7f3a0f400ca8, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f3a19ae2747 in  () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f3a19ae436a in xcb_wait_for_event () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f3a121ae2a9 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007f3a1e4b116d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f3a19f536db in start_thread (arg=0x7f3a0f401700) at pthread_create.c:463
#6  0x00007f3a1ddac88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f3a2233c800 (LWP 8987)):
[KCrash Handler]
#6  0x00007f3a1dcc9e97 in __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51
#7  0x00007f3a1dccb801 in __GI_abort () at abort.c:79
#8  0x00007f3a1e49bfa7 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f3a1cb819f0 in  () at /usr/lib/x86_64-linux-gnu/libQt5QuickWidgets.so.5
#10 0x00007f3a1cb81d5a in  () at /usr/lib/x86_64-linux-gnu/libQt5QuickWidgets.so.5
#11 0x00007f3a1cb83f8e in QQuickWidget::resizeEvent(QResizeEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5QuickWidgets.so.5
#12 0x00007f3a1f6debe2 in QWidget::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#13 0x00007f3a1cb849eb in QQuickWidget::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5QuickWidgets.so.5
#14 0x00007f3a1f69f82c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#15 0x00007f3a1f6a70f4 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#16 0x00007f3a1e68f9a8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#17 0x00007f3a1f6d70eb in QWidgetPrivate::sendPendingMoveAndResizeEvents(bool, bool) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#18 0x00007f3a1f6daec3 in QWidgetPrivate::show_helper() () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#19 0x00007f3a1f6ddbdb in QWidget::setVisible(bool) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#20 0x00007f3a1f6dae30 in QWidgetPrivate::showChildren(bool) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#21 0x00007f3a1f6daedf in QWidgetPrivate::show_helper() () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#22 0x00007f3a1f6ddbdb in QWidget::setVisible(bool) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#23 0x00007f3a1f6dd241 in  () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#24 0x00007f3a1e6bf122 in QObject::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#25 0x00007f3a1f6de743 in QWidget::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#26 0x00007f3a1f69f82c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#27 0x00007f3a1f6a70f4 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#28 0x00007f3a1e68f9a8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#29 0x00007f3a1e69211d in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#30 0x00007f3a1e6e92c3 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#31 0x00007f3a17c03287 in g_main_context_dispatch () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#32 0x00007f3a17c034c0 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#33 0x00007f3a17c0354c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#34 0x00007f3a1e6e88ef in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#35 0x00007f3a1e68d9ea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#36 0x00007f3a1e696a84 in QCoreApplication::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#37 0x0000559a9fd99e44 in  ()
#38 0x00007f3a1dcacb97 in __libc_start_main (main=0x559a9fd99a40, argc=1, argv=0x7ffc46a384c8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffc46a384b8) at ../csu/libc-start.c:310
#39 0x0000559a9fd99eca in _start ()

Reported using DrKonqi