I have exactly the same problem as eMKi (mkisovec), but with Ubuntu 14.04 and dual video card system (Intel Hasewell and Nvidia GEForce 840M). I use Nvidia trive 331 and Bumblebee. Used to work pretty fine. The problem appeared today, may be due to a recently updated package. Seems that I'm not the only one experiencing this:
http://askubuntu.com/questions/522099/ubuntu-14-04-logs-out- every-5-minutes -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to nvidia-graphics-drivers in Ubuntu. https://bugs.launchpad.net/bugs/980519 Title: Random log off in Ubuntu 12.04 LTS To manage notifications about this bug go to: https://bugs.launchpad.net/unity/+bug/980519/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp