Comment 8 for bug 308817

I'm having the same problem with Ubuntu 8.10, but with an HP Photosmart P1100 with a duplex attachment. In the printer config, (system->administration->printing), it quite nicely comes up with the printer when I plug it into the USB port, even maintaining the duplex setting I selected the first time I connected the printer (right-click & select "properties" & choose "more" in the "Common Options" section of "Job Options", it shows "Sides: To-sided (long edge)"). However, when I print from Firefox, the print dialog's "Page Setup" tab shows "Two-sided: Not available", and attempting to print duplex from the command line, as in:

   lpr -o sides=two-sided-long-edge -o page-ranges=1-2 file.pdf

only prints single sided (even though it respects the page range & properly processes the pdf file).