discusses, the first three characters are removed and the software looks for "laserJet mtp_m28-m31" in models.dat. There are no entries in models.dat for this device. I am very surprised journalctl does not inform you of this.
Look again. There is more than one entry found in models.dat when I search for "m28".
Your avahi-browse output shows
ty=HP LaserJet MFP M28-M31
As
https:/ /bugs.launchpad .net/hplip/ +bug/1797501
discusses, the first three characters are removed and the software looks for "laserJet mtp_m28-m31" in models.dat. There are no entries in models.dat for this device. I am very surprised journalctl does not inform you of this.
Look again. There is more than one entry found in models.dat when I search for "m28".
--
Brian.