After closer examination, during installation when I choose to disable the root account by specifying a blank password, the admin user created is not added to the lpadmin group.
Adding the user to the lpadmin group makes it possible to then run hp-toolbox from command line as such user, and the printer is added as expected: sudo adduser $USER lpadmin It's necessary to logout and login again for this to take effect. -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org