I've got a Compaq MX 11800 keyboard that has a ball (used as a mouse). The ball works fine in Ubuntu and Windows, but does not work in Debian or Fedora.
I don't know where to start troubleshooting this issue. Any help is appreciated.
Here's a picture of the thing:
http://www.soulshadow.com/ebay/compaq/100_2472.JPG