Comment 6 for bug 1816226

No, a network connection is fine; best, in fact.

Peter, I hope you do not mind, but I am not going to treat your HPLIP issue because there is no need for you to use HPLIP. (And its easier for me :) ).

Please read

  https://wiki.debian.org/DriverlessPrinting

and

  https://wiki.debian.org/QuickPrintQueuesCUPS

Both are applicable to Bionic.

In essence:

  lpadmin -p m278 -v ipp://NPI5DAA8E.local:631/ipp/print -E -m everywhere

gets you a perfectly good working print queue.

How do you go on?

--
Brian.