Comment 26 for bug 1667323

Thanks for testing. I can perform a bisect to identify the commit that introduced the regression. We first need to know the last good kernel and the first bad kernel version. We know the 4.4.0-62 is good and 4.4.0-64 is bad. Can you test the 4.4.0-63 kernel, which can be downloaded from:

https://launchpad.net/~canonical-kernel-team/+archive/ubuntu/ppa/+build/11016267

For this kernel, you need to install both the linux-image and linux-image-extra .deb packages.