I have no real clue...but for me it was the oposite ubuntu didn't agree to install on my machine...nor mandriva....until I did a nolapic option on install (or noapic) then it went fine...I had nice freezes a different moment of the installwith any of the os...(that was on a hp laptop)
On my main machine (core 2 duo E6600 chipset P35) no way to install ubuntu 7.04
and having network working...don't know for 7.10 but mandriva 2008 went like a charm...
maybe you would like to look in your bios and make sure there are no funny parameters somewhere.
edit: by the way the core2duo is I think not buggy at all, actually it is the best I ever had...good capacity and low temps,