I experience the same symptoms (Alt-Tab triggers it) but was directed by apport to https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video- intel/+bug/980017. I have a comment there which may be appropriate to this.
-- 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/981304 Title: [i965gm] GPU lockup render.IPEHR: 0x11229000 To manage notifications about this bug go to: https://bugs.launchpad.net/xserver-xorg-video-intel/+bug/981304/+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
