On Tuesday 23 January 2018 12.53:11 Uwe Brauer wrote:
> Thanks, I know, I have activated that. The command which should be used
> is /sbin/shutdown, which works when used from the command line.
>
> However when I apply the method I described I will just be logged out.
>
> Regards
>
> Uwe

Just a suggestion: check that you are running tdm. I had this sort of 
behaviour when running TDE with gdm.

Thierry