On Sun 14 May 2023 at 06:37:52 (+0800), hl wrote: > i try old FreeBSD-12.4, accept default FCC/US though i am not in US, > wifi scan succeeds
I don't know how freebsd handles this. In linux, setting the wrong country can only reduce the performance you get, because it's likely that the equipment you're using is already constrained by its burned-in regulatory domain, and any limits (to TX power, channels, etc) are combined. So you might as well get it right. If the page you cited in your OP is up-to-date, then also bear in mind that freebsd claims to use different country codes from the usual ISO ones that linux uses (/usr/share/misc/countries.gz). One of them is Australia, as it happens, a country partly running 8 hours ahead, like wherever you are. Cheers, David.
