This is fixed in latest evince (3.34.1-1) although it's not only a bug in evince but in gtk print dialog or in cups (since it shows up in gedit too). But somehow it go magically fixed.
** Changed in: evince (Ubuntu) Status: Confirmed => Fix Released -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to evince in Ubuntu. https://bugs.launchpad.net/bugs/1212621 Title: Duplex option disappearing in the GTK print dialog To manage notifications about this bug go to: https://bugs.launchpad.net/evince/+bug/1212621/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs