I had the same problem but with the intel driver, disabling KMS (i915.modeset=0) solved it
-- [i945gm] gnome-power-manager and blanking (removal of bodges) https://bugs.launchpad.net/bugs/421347 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
