Comment 2 for bug 1769980

I'm not sure here whether the xenial nomination is meant to apply to the linux package. If so ...

That list of kernel patches is probably correct for bionic. Xenial however is going to require additional patches. The wmm rules are only available with the newer, extensible regdb format which is supported in 4.15 but not in 4.4. So to have any hope of using the wmm rules with 4.4 there would need to be a number of additional backports.

The wireless-regdb changes for xenial will also need some consideration. With the new regdb format there was also a transition to loading the regdb as a firmware file signed with a key whose public half is baked into the kernel. My thinking is that we should just stop building the regdb files from source and ship the pre-built (and pre-signed) upstream binaries. I think this should be fine for xenial but we will need to verify.