> Two sides printing doesn't work on my HP Photosmart C3180. The option > gets ignored (the printer prints the whole sequence and there is no > GUI asking for page reinsertion).
As far as I can tell from its specifications the C3180 does not have auto-duplex. auto-duplex is when the sheet of paper is pulled back into the printer, turned round and printed on the other side.
I was under the impression that two sides printing wasn't auto-duplex but manual two sides printing (that is, first printing even pages, then reversing them manually and then printing odd pages on the reverse). I seem to remember there were further options for this. If I was mistaken, please forgive me.