Hmm... maybe my specific problem is flaky hardware. Today I ran an
upgrade:
Start-Date: 2021-02-09 18:35:34
Commandline: apt-get upgrade
Requested-By: user (1000)
Upgrade: linux-libc-dev:arm64 (5.8.0-41.46, 5.8.0-43.49), openjdk-8-jdk:arm64
(8u275-b01-0ubuntu1~20.10, 8u282-b08-0ubuntu1~20.10),
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=" t
Seems there are problems to query and change the regulatory domain using 'iw
reg get' and 'iw reg set'. A proposed fix to wireless-regdb is available for
testing for Xenial and later, and work is in progress for Precise and Trusty.
See https://bugs.launchpad.net/ubuntu/+source/wireless-regdb/+bu
The symptom you reported seems the same as this one reported for Ubuntu
20.10,
https://bugs.launchpad.net/ubuntu/+source/linux-raspi/+bug/1909678
Try the suggested workaround.
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