Now trying to use a built in trackball from my laptop as the mouse, and can't seem to make it work. A serial mouse attached to the back works just fine. Is there another device name (other than /dev/ttyS0) that I need to use from the XF86Setup? I haven't tried all of them, but is there a particular mouse type (microsoft, logitech, auto) that works best on these trackballs? I've enabled it in CMOS, so it should work ok. Any suggestions? Thanks again everyone. Brian