This seems likely to be an output enablement issue, which with KMS is an issue in the kernel drm, so I'm refiling to the kernel.
It would be instructive if you could attempt to reboot with KMS disabled and see if that makes any difference. ** Package changed: xserver-xorg-video-ati (Ubuntu) => linux (Ubuntu) ** Changed in: linux (Ubuntu) Status: Confirmed => New -- Secondary monitor does not work on ATI HD5770 https://bugs.launchpad.net/bugs/550407 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs