I'm using the docker with happiness until I turn off the USB printer (a Canon MP240 if useful) but not the server. Then I still spend hours trying to make it work (putting the printer properly on the network again).

I noticed that in logs if I restart the server, I find the following error:

Unable to communicate with avahi-daemon: Access denied

Am I doing something wrong? Should it be fine to power off the printer while the server is still running?