Comment 5 for bug 1689517

Thanks for the update. It's probably best for us to perform a bisect to identify the commit that introduced this.

It sounds like 4.4.0-72 did not exhibit the bug. To perform the bisect, we need to identify the last good version and the first bad version. Can you test 4.4.0-75? It can be downloaded from:

https://launchpad.net/~canonical-kernel-team/+archive/ubuntu/ppa/+build/12451435

You would need to install both the linux-image and linux-image-extra .deb packages.