This bug seems related to https://bugs.freedesktop.org/show_bug.cgi?id=88012
As I can reproduce it after setting the parameters to save energy using powertop. ** Bug watch added: freedesktop.org Bugzilla #88012 https://bugs.freedesktop.org/show_bug.cgi?id=88012 -- 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/1511002 Title: Computer freezes/crashes while using GNOME To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1511002/+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