That’s how I’ve been doing it for years. The printer is not needed for weeks, but then… printing works flawless, but the scanner will ask for plugin. Usually I choose direct download from HP. It has happened that the connection refused, then I visit the liked HP-site and download the matching plugin manually and select “local copy”.
Again: stable - testing - unstable are weeks apart. So are versions from time to time. Noobs see an AUR update >>> clic >>> think about that.
trying the automatic way yielded an error about checksum or corrupted file.
i downloaded both
[it needs to match the HPLIP software version you have; you can see this in the ‘HP device manager’ under Help>About
also to download these files you need to right click on them and from the context menu choose “Save link as”,or it’ll just open in a new tab.]
then chose the Manual(Advanced)method and browsed to where i saved both those files,followed the instructions,it completed successfully and i was able to print.
it wasn’t obvious for me at first that the plugins are like the ‘guest additions in Virtualbox’ to the HPLIP software provided by Manjaro.
also i wasn’t to fond of having to put my password while installing this proprietary plugin.