I have been using HPLIP throughout and have not had any driver issues.
Today I got the chance to apply ‘sudo renice’ to the cups process on a print job that was taking a long time to render. I set the priority for cups at -17 and could see that the change was accepted in the ‘top’ command display. It didn’t appear to make a difference.
I couldn’t figure out (reading the process list provided by the ‘top’ command) if there was an HPLIP-specific process to re-nice as well.
I’m still working on this question but no success yet.
Don