Public bug reported:

This happends after package upgrade this morning. nvidia xserver and so
on which i saw along the upgrade. I couldn't not log out normally happy
i can use ctrl alt and backspace. but for users which don't know this
they have to do a hard reboot or by terminal if the can use it and know
how ;)


Thread 1 (Thread 0x7fac75b3a840 (LWP 31635)):
[KCrash Handler]
#6  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50
#7  0x00007fac79853859 in __GI_abort () at abort.c:79
#8  0x00007fac79c86aad in QMessageLogger::fatal(char const*, ...) const () from 
/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007fac7b5fe065 in 
QSGRenderLoop::handleContextCreationFailure(QQuickWindow*, bool) () from 
/lib/x86_64-linux-gnu/libQt5Quick.so.5
#10 0x00007fac7b5ff157 in ?? () from /lib/x86_64-linux-gnu/libQt5Quick.so.5
#11 0x00007fac7b5ffa1d in ?? () from /lib/x86_64-linux-gnu/libQt5Quick.so.5
#12 0x00007fac7a27b9ad in QWindow::event(QEvent*) () from 
/lib/x86_64-linux-gnu/libQt5Gui.so.5
#13 0x00007fac7b681159 in QQuickWindow::event(QEvent*) () from 
/lib/x86_64-linux-gnu/libQt5Quick.so.5
#14 0x000055c60582b156 in ?? ()
#15 0x00007fac7a944a66 in QApplicationPrivate::notify_helper(QObject*, QEvent*) 
() from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#16 0x00007fac7a94e0f0 in QApplication::notify(QObject*, QEvent*) () from 
/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#17 0x00007fac79e8793a in QCoreApplication::notifyInternal2(QObject*, QEvent*) 
() from /lib/x86_64-linux-gnu/libQt5Core.so.5
#18 0x00007fac7a271de6 in 
QGuiApplicationPrivate::processExposeEvent(QWindowSystemInterfacePrivate::ExposeEvent*)
 () from /lib/x86_64-linux-gnu/libQt5Gui.so.5
#19 0x00007fac7a272014 in 
QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*)
 () from /lib/x86_64-linux-gnu/libQt5Gui.so.5
#20 0x00007fac7a24c35b in 
QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>)
 () from /lib/x86_64-linux-gnu/libQt5Gui.so.5
#21 0x00007fac7571132e in ?? () from /lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#22 0x00007fac77eccfbd in g_main_context_dispatch () from 
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#23 0x00007fac77ecd240 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007fac77ecd2e3 in g_main_context_iteration () from 
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#25 0x00007fac79edf565 in 
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () 
from /lib/x86_64-linux-gnu/libQt5Core.so.5
#26 0x00007fac79e864db in 
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from 
/lib/x86_64-linux-gnu/libQt5Core.so.5
#27 0x00007fac79e8e246 in QCoreApplication::exec() () from 
/lib/x86_64-linux-gnu/libQt5Core.so.5
#28 0x000055c6058267cc in ?? ()
#29 0x00007fac798550b3 in __libc_start_main (main=0x55c605826540, argc=1, 
argv=0x7ffe34119808, init=<optimized out>, fini=<optimized out>, 
rtld_fini=<optimized out>, stack_end=0x7ffe341197f8) at ../csu/libc-start.c:308
#30 0x000055c60582691e in _start ()
[Inferior 1 (process 31635) detached]

** Affects: ubuntu
     Importance: Undecided
         Status: New


** Tags: drm ksmserver nvidia xserver

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Title:
  ksm server

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