The patch in #6 applied cleanly for me on ElementaryOS 5.1 Hera (Ubuntu 18.04 variant) and I can confirm that my HP Color LaserJet MFP M281fdw works great with this configuration.
The patch in #6 applied cleanly for me on ElementaryOS 5.1 Hera (Ubuntu 18.04 variant) and I can confirm that my HP Color LaserJet MFP M281fdw works great with this configuration.