Could you also try adding “i915.powersave=0” to the kernel boot line, as in bug #538648? I think this is probably a duplicate.
** Changed in: xserver-xorg-video-intel (Ubuntu) Status: Fix Released => Incomplete -- [gm45] Glitches appears sometimes on screen. Intel GMA 4500MHD https://bugs.launchpad.net/bugs/555350 You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-intel in ubuntu. _______________________________________________ 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