I used the following versions:
bullseye:
status installed broadcom-sta-dkms:all 6.30.223.271-14
buster-backports:
status installed broadcom-sta-dkms:all 6.30.223.271-14~bpo10+1
This also did not work with same errors.
At the buster-backports version I tried the command dpkg-reconfigure
broadcom-sta-dkms , that gave same errors.
Also restarts did not help.
I have no idea this has some relation, but at April a new version of
wireless-regdb is upgraded with lot of changes.
2020-04-18 23:30:05 upgrade wireless-regdb:all 2019.06.03-1 2019.06.03-3.
gert@debian:/lib/firmware$ ls -l regulatory*
lrwxrwxrwx 1 root root 31 Apr 29 23:32 regulatory.db ->
/etc/alternatives/regulatory.db
-rw-r--r-- 1 root root 4248 Apr 12 20:28 regulatory.db-debian
lrwxrwxrwx 1 root root 35 Apr 29 23:32 regulatory.db.p7s ->
/etc/alternatives/regulatory.db.p7s
-rw-r--r-- 1 root root 1225 Apr 12 20:28 regulatory.db.p7s-debian
-rw-r--r-- 1 root root 1182 Apr 12 20:28 regulatory.db.p7s-upstream
-rw-r--r-- 1 root root 4248 Apr 12 20:28 regulatory.db-upstream
gert@debian:/lib/firmware$ ls -l /etc/alternatives/regulatory*
lrwxrwxrwx 1 root root 34 Apr 29 23:32 /etc/alternatives/regulatory.db
-> /lib/firmware/regulatory.db-debian
lrwxrwxrwx 1 root root 38 Apr 29 23:32
/etc/alternatives/regulatory.db.p7s ->
/lib/firmware/regulatory.db.p7s-debian
