ATi Mobile Radeon LY6

I finally got my 3D acceleration back. The combination below seems fix my lockup problem when Xorg restart, especially this line

Option "BusType" "PCI"

Section "device" #
Identifier "device1"
Boardname "ATI Radeon"
Busid "PCI:1:0:0"
Driver "radeon"
Option "DynamicClocks" "True"
Option "AccelMethod" "EXA"
Option "DMAForXv" "OFF"
Option "BusType" "PCI"
Option "SubPixelOrder" "NONE"
# Option "DRI" "OFF"
Screen 0
EndSection