Comment 11 for bug 975445

This issue appears to be an upstream bug, since you tested the latest upstream kernel. Like you mention in the bug description, there was a commit applied to v3.3 to fix a similar issue:

git describe --contains 3a3847e007aae732d64d8fd1374126393e9879a3
v3.3-rc1~182^2~20

However, you still seem to hit this issue in v3.3 final.

Would it be possible for you to open an upstream bug report at bugzilla.kernel.org [1]? That will allow the upstream Developers to examine the issue, and may provide a quicker resolution to the bug.

If you are comfortable with opening a bug upstream, It would be great if you can report back the upstream bug number in this bug report. That will allow us to link this bug to the upstream report.

[1] https://wiki.ubuntu.com/Bugs/Upstream/kernel