Verified with fglrx 2:15.200-0ubuntu on 14.04.1 stock image, external monitor works as expected in all four modes. I will mark this bug as "Fix-released" Thanks!
Note, for the bug mentioned in comment #9, it should be bug 1379217 ** Changed in: hwe-next Status: Confirmed => Fix Released ** Changed in: fglrx-installer-updates (Ubuntu) Status: Triaged => Fix Released -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to fglrx-installer-updates in Ubuntu. https://bugs.launchpad.net/bugs/1379237 Title: AMD Mars XTX [Radeon HD 8790M] [1002:6606] Black screen on external display (extended mode) with fglrx To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/1379237/+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