The problem seems to be resolved (for me) simply by downgrading the kernel, at least 2.6.31-22 (from karmic repos) works properly even with the external monitor. I still use the x-retro driver, maybe it would work with the official driver too.
-- [855GM] GPU hang when an application tries to use XVideo https://bugs.launchpad.net/bugs/554835 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 : [email protected] Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp

