If I remember...
I think that you need a graphics card of some sort for most PC systems to boot. You don't have to use it, but the BIOS expects it to be present and it is a BIOS feature that cannot be overridden. However, you can use another system to boot something such as a server having no graphics(headless) Motherboards designed for server use may natively boot as headless.
Try to google linux headless to see if there is a workaround for directly booting a single PC linux system without graphics.
Last edited by thorkelljarl; 12-26-2009 at 08:13 PM.