I have the same problem on Natty using an nvidia card and the Nouveau drivers. See the following logs.
-- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-nouveau in Ubuntu. https://bugs.launchpad.net/bugs/655800 Title: External monitor connected via displayport is not recognized To manage notifications about this bug go to: https://bugs.launchpad.net/nouveau/+bug/655800/+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
