no mesa = no dri with X.org . mesa contains opensource 3d drivers for various cards (including ati).
you need :
- kernel drm modules for your card (in case of ati : drm.ko , radeon.ko )
- X (duh ;-) )
- mesa with ati dri module (they come with standard mesa install)
- xf86-video-ati driver.
try this :why does AIGLX load even if DRI is working ?
Code:Section "ServerFlags" Option "AIGLX" "false" EndSection