I just recently installed ubuntu 11.04 on an old Inspiron 1100 laptop. Everything works fine except it's only displaying in the upper left half of the screen. An older netbook edition displayed correctly. Any help is very appreciated,thank you.

No I'm not using an external monitor.

The monitors resolution is correct when running Ubuntu off the flash drive. Does that mean anything.

Sorry I'm really quite the linux newbie. Do you have any guides on how to do this.