Re: Watching x264 Video
I have the same problem too, same chipset. I know Ubuntu has had lots of issues with this particular one in the past, it wouldn't surprise me if we're both screwed. Some video players are better than others for me - but worryingly it behaves exactly the same when I'm booted into Windows 7.
Asus G73JH - Intel i7 720QM @ 1.6GHz (Turbo: 2.8GHz), 6MB L2 cache + ATI Mobility Radeon HD 5870 (1GB GDDR5) + 6GB DDR3 RAM + 500GB SATA HDD @ 7200rpm + 1TB External HDD. Ubuntu 10.04 (x64).
And on the seventh day, he made linux.