I can not shut down Leap 15inux after the last update


I thought I was already free of this problem when I uninstalled Leap 42.X and installed Leap 15. Unfortunately, today after installing the latest update I can no longer logout (alt+ctrl+del does not work). The only way to shutdown is cutting the energy, without closing the system properly. Each time I try do logout I get the following notifications in a small window with two tabs, described bellow.

I am asking for your help to find a solution for this problem. (by the way: what is this KSM for? can I get rid of it?)

I thank you for your help.

The contents (translated from portuguese) of the first tab (General) are:

We're sorry, but ksmserver-logout-greeter closed unexpectedly.
This error can not be reported through this wizard, because  ksmserver-logout-greeter does not provide an address for error  reporting.

Executable: ksmserver-logout-greeter PID: 24811 Sign: Aborted (6) Date / Time: 03/01/2019 17:07:43

The contents of the second tab (Developer Information) are:

Thread 1 (Thread 0x7f84d63fc940 (LWP 24811)):
[KCrash Handler]
 #6  0x00007f84d1bf70e0 in raise () from /lib64/libc.so.6
 #7  0x00007f84d1bf86c1 in abort () from /lib64/libc.so.6
 #8  0x00007f84d23a6881 in QMessageLogger::fatal(char const*, ...) const () from /usr/lib64/libQt5Core.so.5
 #9  0x00007f84d4cceff8 in QSGRenderLoop::handleContextCreationFailure(QQuickWindow*, bool) () from /usr/lib64/libQt5Quick.so.5
 #10 0x00007f84d4ccfe49 in ?? () from /usr/lib64/libQt5Quick.so.5
 #11 0x00007f84d4cd09da in ?? () from /usr/lib64/libQt5Quick.so.5
 #12 0x00007f84d2b656db in QWindow::event(QEvent*) () from /usr/lib64/libQt5Gui.so.5
 #13 0x00007f84d4d3ff45 in QQuickWindow::event(QEvent*) () from /usr/lib64/libQt5Quick.so.5
 #14 0x000055c541c557f1 in ?? ()
 #15 0x00007f84d37a4e8c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib64/libQt5Widgets.so.5
 #16 0x00007f84d37ac244 in QApplication::notify(QObject*, QEvent*) () from /usr/lib64/libQt5Widgets.so.5
 #17 0x00007f84d2588a88 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /usr/lib64/libQt5Core.so.5
 #18 0x00007f84d2b5afe9 in QGuiApplicationPrivate::processExposeEvent(QWindowSystemInterfacePrivate::ExposeEvent*) () from /usr/lib64/libQt5Gui.so.5
 #19 0x00007f84d2b5bb4d in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) () from /usr/lib64/libQt5Gui.so.5
 #20 0x00007f84d2b3465b in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQt5Gui.so.5
 #21 0x00007f84c290c160 in ?? () from /usr/lib64/libQt5XcbQpa.so.5
 #22 0x00007f84ca846e07 in g_main_context_dispatch () from /usr/lib64/libglib-2.0.so.0
 #23 0x00007f84ca8471b0 in ?? () from /usr/lib64/libglib-2.0.so.0
 #24 0x00007f84ca84723c in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
 #25 0x00007f84d25debff in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQt5Core.so.5
 #26 0x00007f84d258709a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQt5Core.so.5
 #27 0x00007f84d258f9e4 in QCoreApplication::exec() () from /usr/lib64/libQt5Core.so.5
 #28 0x000055c541c52837 in ?? ()
 #29 0x00007f84d1be1f4a in __libc_start_main () from /lib64/libc.so.6
 #30 0x000055c541c5298a in _start ()
 [Inferior 1 (process 24811) detached]

When you have trouble shutting down:

CTRL-ALT-F1 – should get you a command line session.

CTRL-ALT-DEL (may have to do that twice).

Usually that will give proper shutdown, and is better than shutting off the power.

OK, I will try next time I get this problem.

Thanks for your help!