Ubuntu 5.10 doesn't fill laptop screen
I'm a very new Linux user, and have only installed Kubuntu and Ubuntu 5.10. I just installed Ubuntu on my Dell Inspiron 1100 and everything went fine with the install, as far as I can tell. However, my screen only displays Ubuntu in a certain area in the middle of the screen. The area around it is all black.
Is it a driver I need, or some setting within Ubuntu, or something else?