[ubuntu] Ubuntu + Sandy Bridge problems

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http://ubuntuforums.org – Hello, (This is my first post here. I first searched threads discussing similar problems, but while I found other Sandy Bridge issues they appeared to be different from mine. My apologies if I've missed something). I'm having some trouble with Ubuntu on a newly built computer using Sandy Bridge. The motherboard is an Asus P8H67-M Evo (Intel H67 chipset), processor is i5-2500k. I'm trying to use the processor's integrated GPU (Intel HD 3000). On most boots, either from Live CDs (I've tried Ubuntu 11.04 beta 2, Fedora 15 beta 2, and the Ubuntu and Fedora nightlies from 4-21-2011) or from the (Hardware)