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="
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
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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