Two steps must be completed to get X to recognize your tablet. First,
you need to add some lines to XF86Config/xorg.conf to inform X of the tablet's
existence. Second, you need to update the XInput driver that pertains
to the tablet since the one that ships with XFree86/Xorg is not very functional.
Neither driver holds a candle to the windows driver though, so you'll
have to take what you get for the time being. Updates to the XFree86/Xorg driver
are available in the releases on the
Downloading the Code page.