Comment 17 for bug 1498667

Can you also test the following upstream kernel:
http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.2-rc1-unstable/

If v4.2-rc1 has the bug, we can bisect between 3.19 final and 4.2-rc1. If v4.2-rc1 does not have the bug, we will have to test some of the other 4.2 release candidates(rc2, rc3, etc) to find which one introduced the bug.