Comment 4 for bug 1951586

> I am not sure if netplan (i.e. the network definition of a specific WiFi interface) is the
> correct place to handle this. The regulatory domain is a global concept that is being
> handled in the kernel and affects all radio devices, like WiFi and Bluetooth. If we change
> that on a single wifi interface definition, it will have side-effects on other radios.

Even if it is a global setting (as floris has pointed out, iw reg lists it per phy), surely that's the common use-case? If someone really needs different regions for different radio devices (on one system!) then we could declare that "too complex, out of scope" and leave it to them to configure externally to netplan.

> BTW on the Ubuntu 21.10 aarch64 Pi image it always seems to show as UNSET even if I do set
> /etc/default/crda and reboot, which may be another bug.

That's odd -- I've just tried the same on a jammy development install and it's persisting happily across reboots. I'll flash a fresh impish image and see if I can replicate (I'll file a separate bug if I can).