I have a ps/2 keyboard connected to an Acer Aspire 1694 WLMI via a ps/2 to usb converter. The laptop is running Ubuntu 9.04.
The keyboard is a HP model number: SK-250C.
I have configured in the 'Keyboard Preferences' the layout to HP SK-250x Multimedia Keyboard.
The big problem is when I press certain keys (like for example the arrow keys) I get the 'Save Screenshot' dialog. This is really getting annoying, sometimes I am tying to write an address in browser and just want to go back a few letters and can't. There are other keys that trigger the dialog also (windows key, insert key, home key, page up and page down key, delete key, end key)
All works fine If I use the laptop keyboard, but I really want to use the HP keyboard.
I was testing this and it seems that if I have the 'Num Lock' key turned off the keys work properly. Strange but true!!