I upgraded my wifes computer yesterday to ubuntu 8.04, now after the upgrade the numlock keypad stopped working, the light would toggle, but that would still not help in getting it to type. I tried a few different layouts in System -> Preferences -> Keyboard, generic 104 i would have thought would work. The keyboard does work in terminal if you Ctrl-Alt-F1 for example, so it is a gnome thing!?!, i tried to do a dpkg-reconfigure xserver-org but that didn't help
I also tried copying my old xorg.conf file in to place but also didn't change.
It is PS2 keyboard hp KB-0316