Comment 4 for bug 390196

Bernard, your tablet seems to be recognized by HAL. What could be the problem is that some old 8.04 (or earlier) configuration is preventing your tablet to work with the way 9.04 configures it. Even though you said you didn't configure anything for your tablet, your xorg.conf says it has been configured, maybe by Ubuntu 8.04 or earlier. For example, I've already seen that commented lines (maybe when there's double # like the "Tablet PC" lines in your /etc/X11/xorg.conf, but not sure) in xorg.conf prevented my Intuos 3 from working on an upgraded system.

You could download a Jaunty Live CD, boot it, and in the Live session install wacom-tools, then plug your USB Wacom tablet and try if it works (and also have a look at /dev/input/ and /dev/input/by-id). Same with a Karmic Live CD in the event the Jaunty one didn't recognize your tablet. However, I doubt there'll be any problem, since AFAIK your tablet model has been supported for a while.

Then if it works, backup your /etc/X11/xorg.conf and then edit it, removing all commented lines. Or, better, if you don't mind switching to a virtual terminal and using the command line, delete it (after you made a backup), then "sudo /etc/init.d/gdm stop", recreate xorg.conf with "sudo dpkg-reconfigure -phigh xserver-xorg".

There might also be a conflict with an old/custom HAL .fdi file in /etc/hal/fdi/policy/ (should have no file containing the name wacom). Check you also have /usr/share/hal/fdi/policy/20thirdparty/10-linuxwacom.fdi and no /usr/share/hal/fdi/policy/10osvendor/ one. For example, go to the root directory and run "sudo find | grep acom | grep fdi"