With lpr -o sides=two-sided-long-edge document.pdf it works. My guess is that it would work if only the option was available in the printing dialog.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/416513 Title: duplex printing no longer works for OfficeJetPro 8500 with HPLIP > 3.9.6b To manage notifications about this bug go to: https://bugs.launchpad.net/hplip/+bug/416513/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs