Ubuntu
xserver-xorg-video-ati package

  1. Bug #183873
  2. Comment #3

Comment 3 for bug 183873

Revision history for this message
In , agd5f (agd5f) wrote :

looks like ubuntu is carrying some strange patches which I suspect are to blame. Can you try with ati git master?

Also, if you don't want to use LVDS, turn it off:
xrandr --output LVDS --off