Sounds like the update to xorg-edgers triggered a fallback to vesa; something broke in the installation. I've landed a couple of patches which I think are going to be related, so if you can verify you have a working setup with ppa:xorg-edgers that would be great.
** Changed in: xserver-xorg-video-intel (Ubuntu) Status: Triaged => Incomplete -- 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/1157458 Title: visual glitch in Evolution's importance button, etc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1157458/+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