Terminal

cat /dev/ttyS0

returns garbage when the pen is moved

http://ubuntuforums.org/showthread.php?t=52978

http://ubuntuforums.org/showthread.php?t=52978 yo edit x11.conf

http://ubuntuforums.org/showthread.php?t=307716 to get to X.conf

http://twodayslate.wordpress.com/2008/01/20/wacom-tablet-in-ubuntu/   for wacom

http://richardappleby.wordpress.com/2010/12/26/wacom-bamboo-pen-tablet-under-ubuntu-10-10/ for wacom to netbook