HP AIO 7310 ppd seems to be missing duplex option

[TheGuv]

I have just acquired an HP Officejet 7310 all-in-one printer. All works lovely (hpijs 2.6.9-0ubuntu2 + hplip 1.6.9-0ubuntu2) except duplex printing for which the nearest ppd (7300 series) doesn't appear to have any duplex option.

As far as I'm aware, the 7310 comes with duplexor as standard.

Any clues how to add this would be most appreciated.

[Aaron Albright (albrigha-deactivatedaccount)]

Please run hp-check and post the output.

Also please add the ppd file you are using from /usr/cups/ppd and upload that as well.

Thanks!

Aaron

[Aaron Albright (albrigha-deactivatedaccount)]

Any update?

A