[Hplip-help] double-sided printing

[Jerry B. <bre...@he...>]

    I have a PSC2175 connected to a Linux Mint box.  I've now been able 
to get 2 pages printed on the front side of each sheet of paper, but 
even though I've selected both options (long-edge and short-edge) of the 
double-sided selection, the printing process never pauses to let me 
re-insert the paper into the printer so that the double-sided process 
gets accomplished -- it just forges ahead, printing one-sided until the 
job is done.
    I'm a Linux newbie.  Am I overlooking something?  What is the "fix" 
for this?
    Thanks.
             Jerry