Ubuntu
xserver-xorg-video-ati package

  1. Bug #144077
  2. Comment #36

Comment 36 for bug 144077

Revision history for this message
Jerone Young (jerone) wrote : Re: [gutsy] Regression - "Desktop effects could not be enabled" on ATI Mobility Radeon

Doing the workaround worked! Here is what I did

1) ALT+F1 (to get to console)
2) stopped gdm
3) unloaded modules radeon drm
4) reloaded modules radeon drm
5) ALT+F7 to get to xwin .. logout
6) start gdm

The order is a little clumsy .. but it just worked after I did this. So the problem is how the radeon drm module is being loaded.