Same goes for me. Fixed the pnm2ppa.conf to istate 'version 710' instead of just 'version' and all problems were gone, using a DeskJet 710C.
-- HP DeskJet 7xxC, 820C or 1000C does not work out of the box https://launchpad.net/bugs/52814 -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
