Yeah semaphores were disabled in the final 2.6.38 release so that hang will be gone. Can you please try this kernel to see if the corruption is still present?
http://kernel.ubuntu.com/~sarvatt/2011Q1/ ** Tags added: hwe-blocker -- 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/732304 Title: Intel sandy-bridge dual-head GPU hang _______________________________________________ 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