To assist with this can you get the following outputs from the broken system:
# Change 'hostname.local' to the hostname expected to work cat /etc/nsswitch.conf systemctl status avahi-daemon journalctl -u avahi-daemon --boot avahi-resolve-host-name hostname.local getent hosts hostname.local ** Changed in: avahi (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to avahi in Ubuntu. https://bugs.launchpad.net/bugs/1952496 Title: ubuntu 20.04 LTS network problem Status in avahi package in Ubuntu: Incomplete Bug description: Network afp only partially works. Two tries, Elementary OS 6, Ubuntu 20.04 installs both have identical problem. Resolved by reinstalling Ubuntu 18.04 LTS. Using different kernels doesn't matter. Specific problem is with afp protocol name resolution. Searching local network for ip address using afp://ip_address did connect, but using GUI Files/Other Locations/Networks with named hosts will not. Always returns can't resolve hostname.local. Tried multiple edits of different network files, even installed netatalk in attempts. Again, solution is to go back to downgrade, works right out of the box, as did on another, and this before upgrade. This was only attempted with 2 other computers, one mac, one ubuntu/elementary. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/avahi/+bug/1952496/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp