This may be related to https://launchpad.net/distros/ubuntu/+source /xserver-xorg-video-ati/+bug/67183
-- [radeon] can't do dual-link tmds, or second tmds transmitter https://launchpad.net/bugs/27466 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
