I've just started using Ubuntu so I can't help much.
Have you looked around http://www.ubuntuforums.org/index.php I find lots
of answers there.
I got my Epson to work second try. No drivers or anything. iirc, just
had to detect the usb device and off it went.
Now, if MythTv were as easy... I've been 3 weeks trying to get that to work.