2015.07.24 — Fedora 22 printer problem solved… Soon after I installed Fedora 22, I was unable to print on my 2015 purchased HP OJ-P 8620 which is USB connected directly to Thor, my main desktop Fedora Linux workstation. This is a major gotcha.
Since last installing Fedora 22 this printer hardware had not worked. Today, I tried the Fedora superuser command “dnf update” to see if any changes had been broadcast. After maybe 10-15 minutes of downloading then doing the updates, I did a power cycle of Thor and what do you know, now I had printer function back!
When using software at the bleeding edge [AKA Fedora nn] it pays to update frequently! I imagine that when I next go into the “System Settings” of cinnamon on Thor, I will find the missing printer is actually there!