Code:
knoppix26 apm=off nolapic noscsi acpi=on
I had a very similar problem, and the nolapic has something to do with detecting mulitple processors. On the computers I have tried it on, they always show up two processors even though there is only one. On my laptop, I am running an AMD 2200 and things are working good. You do want to make sure you put in acpi=on though because otherwise your laptop will probably overheat.

Lemme know if this help.

Jamie