This bug seems to have been hijacked by an unrelated Xgl bug. The initial reporter wasn't using Xgl, and didn't get as far as the GDM login screen.
Bouncing this bug back to gdm.
@Rob - if you can still reproduce, could you please open a new bug against xserver-xgl attaching the output of "DISPLAY=:0 glxinfo", please?
This bug seems to have been hijacked by an unrelated Xgl bug. The initial reporter wasn't using Xgl, and didn't get as far as the GDM login screen.
Bouncing this bug back to gdm.
@Rob - if you can still reproduce, could you please open a new bug against xserver-xgl attaching the output of "DISPLAY=:0 glxinfo", please?