Comment 51 for bug 749839

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

It would be great if you can report back the upstream bug number in this bug report, so this bug can be linked to the upstream report.