Comment 71 for bug 1160188

FYI 3.11 kernel landed in Ubuntu 13.10 development version, so this is now also fixed there without any tricks.

Ubuntu 13.04 is apparently getting a partial fix (not sure if it's enough, two patches were originally mentioned as being relevant) in its next kernel update (bug #1204666), and I've attached a patch to bug #971809 that would bring the other part there too if picked up by kernel stable release update team.