Installing the printer using KDE's print setup interface to CUPS defaults to using the HP DesignJet 500 Foomatic/cdnj500 driver, which works, but doesn't allow duplex printing, at least when trying from okular.
Installing the printer using hplip-gui (hp-setup) spits out a warning message about
warning: No PPD found for model laserjet_500_color_m551 using new algorithm. Trying old algorithm...
And the PPD field is defaulted to
foomatic-db-compressed-ppds:0/ppd/foomatic-ppd/HP-LaserJet_5100-pxlmono.ppd
Which *does* allow duplex printing from okular, but fails to print in colour.
The HP LaserJet Enterprise 500 Color m551dn printer is claimed to be fully supported using HPLIP 3.11.10 (http:// hplipopensource .com/hplip- web/models/ color_laserjet/ hp_laserjet_ 500_color_ m551.html), so it should be supported under the 3.12.2 version shipped with Ubuntu 12.04.
Installing the printer using KDE's print setup interface to CUPS defaults to using the HP DesignJet 500 Foomatic/cdnj500 driver, which works, but doesn't allow duplex printing, at least when trying from okular.
Installing the printer using hplip-gui (hp-setup) spits out a warning message about
warning: No PPD found for model laserjet_ 500_color_ m551 using new algorithm. Trying old algorithm...
And the PPD field is defaulted to db-compressed- ppds:0/ ppd/foomatic- ppd/HP- LaserJet_ 5100-pxlmono. ppd
foomatic-
Which *does* allow duplex printing from okular, but fails to print in colour.