I had a devil of a time with mine. Finally uninstalled the version of HPOJ, SANE front and backends and XSANE that came with Fedora. Then installed updated versions of them.Yes I have noticed the USB port locked and CUPS waiting to print, if I can find out how to debug the scanner finishing and not releasing the port I'll bugzilla to HPOJ maintainers maybe it's already noted - have to check.
I still have a problem with the USB port not being released after scanning, but discovered that if I powered the unit off and back on, port was released and I could print again.
BTW, I had deselected HPOJ and a couple of other things when I installed Fedora. They were installed anyway. Should I have disconnected the printer from the USB port before I installed Fedora or is this just a bug?
Sarah Fish Saratoga Springs, NY
I think HPOJ/HPIJS is part of the Printing package, so you get it wether or not.
david.