Public bug reported: I'm trying to diagnose why I'm unable to connect to a 5GHz WiFi access point from my Ubuntu 20.10 Raspberry Pi 4B 8GB. I wondered if it might be a problem with the crda. The default /etc/default/crda did not specify a country code. I edited the file to change "REGDOMAIN=" to be "REGDOMAIN=US" and rebooted.
After I run "iw reg set US", I get unexpected results for "iw reg get", that don't match the output from my Ubuntu 16.04 laptop. $ cat /etc/default/crda # Set REGDOMAIN to a ISO/IEC 3166-1 alpha2 country code so that iw(8) may set # the initial regulatory domain setting for IEEE 802.11 devices which operate # on this system. # # Governments assert the right to regulate usage of radio spectrum within # their respective territories so make sure you select a ISO/IEC 3166-1 alpha2 # country code suitable for your location or you may infringe on local # legislature. See `/usr/share/zoneinfo/zone.tab' for a table of timezone # descriptions containing ISO/IEC 3166-1 alpha2 country codes. REGDOMAIN=US $ iw reg get global country AL: DFS-ETSI (2400 - 2483 @ 40), (N/A, 20), (N/A) (5150 - 5250 @ 80), (N/A, 23), (N/A), NO-OUTDOOR, AUTO-BW (5250 - 5350 @ 80), (N/A, 20), (0 ms), NO-OUTDOOR, DFS, AUTO-BW (5470 - 5725 @ 160), (N/A, 26), (0 ms), DFS (5725 - 5875 @ 80), (N/A, 13), (N/A) $ sudo iw reg set US $ iw reg get global country 98: DFS-UNSET (2400 - 2472 @ 40), (N/A, 20), (N/A) (5150 - 5250 @ 100), (N/A, 23), (N/A), NO-OUTDOOR, AUTO-BW (5250 - 5350 @ 100), (N/A, 20), (0 ms), NO-OUTDOOR, DFS, AUTO-BW (5470 - 5725 @ 160), (N/A, 23), (0 ms), DFS (5725 - 5730 @ 5), (N/A, 13), (0 ms), DFS (5730 - 5850 @ 80), (N/A, 13), (N/A) On my Ubuntu 16.04 laptop, 'iw reg get' returns 'country US: DFS-FCC' and a different list of frequency bands. $ sudo apt-cache policy wireless-regdb wireless-regdb: Installed: 2020.11.20-0ubuntu1~16.04.2 Candidate: 2020.11.20-0ubuntu1~16.04.2 Version table: *** 2020.11.20-0ubuntu1~16.04.2 500 500 http://us.archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages 500 http://us.archive.ubuntu.com/ubuntu xenial-updates/main i386 Packages 500 http://security.ubuntu.com/ubuntu xenial-security/main amd64 Packages 500 http://security.ubuntu.com/ubuntu xenial-security/main i386 Packages 100 /var/lib/dpkg/status 2015.07.20-1ubuntu1 500 500 http://us.archive.ubuntu.com/ubuntu xenial/main amd64 Packages 500 http://us.archive.ubuntu.com/ubuntu xenial/main i386 Packages $ iw reg get country US: DFS-FCC (2400 - 2472 @ 40), (N/A, 30), (N/A) (5150 - 5250 @ 80), (N/A, 23), (N/A) (5250 - 5350 @ 80), (N/A, 23), (0 ms), DFS (5470 - 5730 @ 160), (N/A, 23), (0 ms), DFS (5730 - 5850 @ 80), (N/A, 30), (N/A) (57240 - 71000 @ 2160), (N/A, 40), (N/A) ProblemType: Bug DistroRelease: Ubuntu 20.10 Package: wireless-regdb 2020.11.20-0ubuntu1~20.10.1 ProcVersionSignature: Ubuntu 5.8.0-1013.16-raspi 5.8.18 Uname: Linux 5.8.0-1013-raspi aarch64 ApportVersion: 2.20.11-0ubuntu50.5 Architecture: arm64 CasperMD5CheckResult: skip CurrentDesktop: ubuntu:GNOME Date: Sat Feb 6 00:15:23 2021 Dependencies: ImageMediaBuild: 20201022 PackageArchitecture: all ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash SourcePackage: wireless-regdb UpgradeStatus: No upgrade log present (probably fresh install) ** Affects: wireless-regdb (Ubuntu) Importance: Undecided Status: New ** Tags: apport-bug arm64 groovy -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1914853 Title: regression-update: Unexpected Results 'iw reg set US' To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/wireless-regdb/+bug/1914853/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs