Comment 41 for bug 1386534

c031389a is reported as the first bad commit. This is commit b47f210 in the Utopic repo.

I built a Utopic test kernel with commit b47f210 reverted.

The test kernel can be downloaded from:
http://kernel.ubuntu.com/~jsalisbury/lp1386534

Can you test this kernel and see if it has the bug or not?