Comment 4 for bug 368642

@mutew, can you paste the output of "lspci -nn | grep VGA" and also a copy of your /var/log/Xorg.0.log please. PS. If it turns out that you have a 965 chipset, then just sit tight because it's a known bug that is being worked hard on.

Now, in case you're on a non-965 chipset... If you have access to two computers can you please install ssh on the buggy machine and then the next time the freeze happens you'll do these things (please note that step 3 requires you to install a new kernel right away even before the freeze happens because only the new 2.6.30 kernels have this new kind of freeze debugging capability):

1) Try to run "apport-collect 368642"
2) If for some arcane reason you're unable to run this command, please sabes copies of xorg.log and xorg.log.old (please do this even if you have previously attached another copy of xorg.log because right after the time freeze has happened there might be special information available in xorg.log or in xorg.log.old that helps us understand the freeze).
3) This is a big one, but please collect a batch buffer dump. This dump is very useful for determining _why_ your machine is freezing. This is the one thing that gives upstream developer a decent chance to fix your bug. Detailed instructions on how to do this is available here: https://edge.launchpad.net/~ubuntu-x-swat/+archive/x-freeze-test