On Saturday 16 January 2016 19.08:54 Gerhard Zintel wrote:
> Now I see that there is something in comon between us both. I also use an
> external USB switch, to switch keyboard and mouse between a Windows and a
> Linux system. I use it very seldom, for sure not before the problem
> happened. But who knows ...
>
> I furthermore mostly don't shut-down my system but put it into the Suspend
> state. My assumption is that sometimes it does not correctly re-initiate
> all parts of the system when coming out of Suspend.

This I don't do, I shut down every evening and usually also during the day.
I did no more see the problem since I set the keaboard to 105 keys - but 
that's too soon to consider it the solution. 

Thierry