Andreas, you are probably running into this bug which is still current. https://bugs.freedesktop.org/show_bug.cgi?id=92911
A fix needs to be backported to wily. ** Bug watch added: freedesktop.org Bugzilla #92911 https://bugs.freedesktop.org/show_bug.cgi?id=92911 -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-intel in Ubuntu. https://bugs.launchpad.net/bugs/1522727 Title: X.org crashes intermittently, randomly, back to the login screen To manage notifications about this bug go to: https://bugs.launchpad.net/xserver-xorg-video-intel/+bug/1522727/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : [email protected] Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp

