[cups.general] How to duplex print?

[Tom Combs]

Hi,

  I have an HP Laserjet 4050 that is able to duplex print and has this
  feature enabled. However, when I print to this printer via CUPS, it
  only prints on a single side. What do I need to do to get CUPS to
  utilize the duplex printing?  Thanks,  Tom Combs
  
  
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Tom Combs                                      E-mail: combs at magnet.fsu.edu
National High Magnetic Field Laboratory        Phone:  (850) 644-1657
1800 E. Paul Dirac Drive                       Tallahassee, FL 32310