Thanks JD, 

Thanks for your suggestion. It's strange that I haven't touched anything on 
permissions or groups lately/past 2-3 months/ it happened just like that. 
And more interestingly when I checked the groups today to add the suggested 
most of what I added before was gone, so maybe that was it. I will inspect 
for a few days and report back whether it was solved by that.

On Thursday, September 10, 2015 at 12:51:41 AM UTC+3, JD Robinson wrote:
>
> If you're getting booted off the system and out of the desktop 
> environment, then you're violating some permissions somewhere or the 
> service holding up your session is erring out on account of this.
>