yes its a ps/2.
and the latest xorg.conf mouse configuration as follows :
Section "InputDevice"
Identifier "Configured Mouse"
Driver "mouse"
Option "CorePointer"
Option "Device" "/dev/psaux"
Option "Protocol" "ImPS/2"
Option "ZAxisMapping" "4 5 6 7"
Option "Buttons" "9"
EndSection
still not works as i want