Comment 47 for bug 428588

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Benjamin Weggenmann (bubun2) wrote :

I forgot to say I have an OfficeJet Pro 8500A.

I just tried to set the CUPS Printer Default Options to "Long Edge" (my idea was to 'force' even gnome/non-KDE apps to use duplex), and got this "fun" result (see attached screenshot):
--- snip ---
Error: The following options are conflicting:

    Double-Sided Printing: Long Edge (Standard)
    Duplexer Installed: Installed

Please change one or more of the options to resolve the conflicts.
--- snap ---

Aha, so if I have a duplexer I cannot print duplex. Great. Of course changing the "Duplexer Installed:" to "Not Installed" does not allow me to set the "Double-Sided Printing:" option to "Long Edge (Standard)" either.