Might post current /etc/X11/xorg.conf file but you can use the search tool here and use the search string ' ati xorg direct rendering ' and getting examples of xorg setup for items I think you are refering too.
Brian
Distribution: RHEL 5.1 with Pieces of this and that.
Kernel 2.6.23.9, KDE 3.5.8 and KDE 4.0 beta, Plus Development src.rpm, ATI fglrx64_7_1_0-8.433-1 rpm with 3D and DRI working.
Acer 5100-5840 with webcam, ati, sdcard reader, sound, atheros based wireless, all working. Only thing not working is the memory stick reader.