Comment 5 for bug 183873

(In reply to comment #2)
> Alex,
>
> I tried the latest source code from the git tree and it doesn't help.

Can you attach the xorg log?

>
> $ ls -l /usr/lib/xorg/modules/drivers/ati_drv.so
> -rwxr-xr-x 1 root root 51944 2008-01-22 13:38
> /usr/lib/xorg/modules/drivers//ati_drv.so

you need radeon_drv.so as well.