Comment 35 for bug 1862760

At this point, we've had all the necessary firmware blobs for numerous releases and I'm reasonably convinced that the remaining AC wifi issues are largely related to incorrect regulatory domain, because we don't provide a friendly way of setting this on desktop (see LP: #1951586 for more on this).

I'm going to mark bionic as won't fix as it's EOL (sans ESM) anyway, focal as fix released as we did add all the relevant blobs (at the time) as a back-port to that, and the devel versions as fix released.

If anyone is still have 802.11ac connectivity issues, I strongly recommend checking the wifi regulatory domain with "iw reg get". If it doesn't match your expected country, please see:

* For server, see the "regulatory-domain" setting under "wifis:" in netplan -- https://netplan.readthedocs.io/en/stable/netplan-yaml/#properties-for-device-type-wifis

* For desktop, add "cfg80211.ieee80211_regdom=CC" where CC is your country code to "/boot/firmware/cmdline.txt" and reboot. Urgh.