Turns out fglrx was in /etc/modprobe.d/blacklist-local.conf for some reason. After removing it, the Catalyst driver works fine. Marking the bug as invalid.
** Changed in: fglrx-installer (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to fglrx-installer in Ubuntu. https://bugs.launchpad.net/bugs/1310170 Title: fglrx DRI initialization fails on Radeon HD 7660G (Trinity) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/fglrx-installer/+bug/1310170/+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