when playing smplayer not reboot system

English Multimedia
1

i have a problem. when i
playing video whith smplayer and i
want reboot system without
close smplayer but not reboot( without having to close the
Smplayer system does not
reboot )
show me black
screen and freeze (not reboot or shutdown )
I must and hold
key power untill system
shutdown

my opensuse 42.1 kde and
session plasma 5

2

Sudo reboot
I test with terminal work reboot (when playing smplayer)
Still But not work menu GUI reboot

3

Do you like this problem to someone ?