[ubuntu] LiveUSB boots only terminal

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http://ubuntuforums.org – Hello, I have created a liveUSB of Ubuntu 11.10. It works well on my home computer, after selecting Ubuntu in GRUB it loads on and runs. But, when I put the USB into school computer, it loads GRUB, then I choose ubuntu 11.10 and it starts loading. But, it does not boot into a graphical interface, with the login screen, but only gives me a terminal line on a black screen. Why is it not working on school computer as well as on mine? Is it because of different graphics drivers? Thanks for help. (Hardware)