If you're talking about the ASPM regression introduced in 2.6.38, it looks like it's been resolved in a patch that should drop in 3.3. Here's a Phoronix articl

If you're talking about the ASPM regression introduced in 2.6.38, it looks like it's been resolved in a patch that should drop in 3.3. Here's a Phoronix article on the issue and fix that covers it in detail: http://www.phoronix.com/scan.php?page=article&item=linux_aspm_solution&num=1 http://www.phoronix.com/scan.php?page=article&item=linux... And here's (what I think is) the corresponding bug for Ubuntu: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/760131 https://bugs.launchpad.net/ubuntu/+source/linux/+bug/760131 Please note that even though that Ubuntu bug is marked as fixed, the following comment on it seems to call that into question: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/760131/comments/241 https://bugs.launchpad.net/ubuntu/+source/linux/+bug/760131/... Either way, it sounds like it will be fixed in 12.04.