Comment 8 for bug 1773232

Also, would it be possible for you to test some prior kernels to see if there was a previous good version? If there is a prior good kernel, we can perform a kernel bisect to identify the commit that introduced this bug.

Prior upstream kernels can be found at:
http://kernel.ubuntu.com/~kernel-ppa/mainline/

I would suggesting starting with 4.14, then maybe 4.13, 4.12, etc.