Bug 246031 - Using regulatory domain FCC4 disables 5Ghz networking
Summary: Using regulatory domain FCC4 disables 5Ghz networking
Status: New
Alias: None
Product: Base System
Classification: Unclassified
Component: wireless (show other bugs)
Version: 12.1-RELEASE
Hardware: amd64 Any
: --- Affects Only Me
Assignee: freebsd-wireless (Nobody)
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2020-04-29 18:17 UTC by Tom Sparks
Modified: 2020-04-30 22:48 UTC (History)
1 user (show)

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Description Tom Sparks 2020-04-29 18:17:12 UTC
I was setting up a laptop with FreeBSD 12.1-RELEASE and the installer set the regulatory domain to FCC4, I noticed it didn't show any 5Ghz networks.

I switched it to FCC3, and suddenly there were 5Ghz networks.
I thought it might be a driver bug specific to iwn but it turns out that it happens on my RPI3 with a ral USB nic.

I mentioned this to a friend who's very familiar with WiFi stuff on FreeBSD and he mentioned that this sounded like a channel list issue.

I also realized finding info/documentation about the regulatory domain stuff on FreeBSD was hard, so I just started digging into the source tree.

I read through src/lib/lib80211/regdomain.xml and I noticed the stanza for FCC4 had no entry for <netband mode="11na"> wheras FCC3 had an entry.