Comment 24 for bug 1674838

Hmm, it sounds like this bug is only happening in Ubuntu kernels and not any of the upstream kernels. That indicates this is due to a SAUCE patch. We next need to identify the last Ubuntu kernel version that did not have the bug and the first that did.

Can those affected test the following early Zesty kernel:
https://launchpad.net/~canonical-kernel-team/+archive/ubuntu/ppa/+build/12001523

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