(In reply to comment #16)
> Yes, that patch worked, no more messages.
> I still get no accel though ("RADEON(0): GPU accel disabled or not working,
> using shadowfb for KMS"), but I guess I need to investigate that further
> first - unless you have a quick idea ?

Acceleration is currently disabled by default on hawaii as it's unstable for a
lot of apps.  You can force it on with
Option "NoAccel" "false"
in the device section of your xorg conf, but you'll see gpu hangs.