12" screen ?

Hi all... How do I tell SuSE that my screen is 12 inch? It seems to default to 15". When I connect my 12" all I get on the screen is green and white lines. The boot screen shows fine. I guess I need to give a command at the boot screen, but what? I'm running 8.1. Thanks JIM -- Jim Hatridge Linux User #88484 ------------------------------------------------------ BayerWulf Linux System # 129656 The Recycled Beowulf Project Looking for throw-away or obsolete computers and parts to recycle into a Linux super computer