On Sat, 31 Mar 2007, Vincent wrote:
> However, if I set up things so that 'radeon_dri.so' is loaded by Xfree at 
> start (whether or not AIGLX is enabled), I get that black screen. I'll try to 
> poke around.

Sounds familiar. In xorg.conf, you want:

   Section "ServerFlags"
       Option "NoTrapSignals"
   EndSection

This way, if you run it as root, it will dump core rather than trying to 
shutdown cleanly :)

I'm willing to bet that your Xorg binary isn't linked against libpthread 
-- is this correct? If so you need to relink it for AIGLX to work.

Cheers,
Jared