Kde can not shutdown

Dear all.
I am using opensuse 11.4 (was recently updated from 11.3).
When I try to turn off my computer using kde (Leave->shut down) I receive a gray screen and system can ‘stay’ in that situation for days.

Could you please suggest me where to look for log files as well as some command line commands that can be used to force gui(kde-plasma-whatever you call it) to shut down or restart?

Best regards

I do not know why this is happening. Check out the settings in “Configure manager–Login manager -->tab Shutdown”
should say “Everyone” and

Does ctrl+alt+backspace (2times) work? It should kill the X-server and restart it.

While stuck you can get to a terminal by dropping to a tty with ctrl+alt+F6 (to get back use ctrl+alt+F7). you can try to kill kwin with" killall kwin"

If you login as root you can do “shutdown -h now” but you probably knew that…