https://bugs.freedesktop.org/show_bug.cgi?id=27644
--- Comment #2 from Cameron Gorrie sastraxi@gmail.com 2010-04-14 12:26:43 PDT --- (In reply to comment #1)
does radeon.new_pll=0 also fix the problem?
Alex, it does not. I replaced "radeon.modeset=0 vga=771" with "radeon.new_pll=0".
Cam