Thank you for the patch, I will apply it to the next Ubuntu release of the HPLIP package. Please note that your patch is not complete, also in the fax PPD for "HP Fax 2" the device ID has to be changed to "MFG:HP;MDL:Fax 2;DES:HP Fax 2;" (Note the MDL part, it must be "Fax 2".
Thank you for the patch, I will apply it to the next Ubuntu release of the HPLIP package. Please note that your patch is not complete, also in the fax PPD for "HP Fax 2" the device ID has to be changed to "MFG:HP;MDL:Fax 2;DES:HP Fax 2;" (Note the MDL part, it must be "Fax 2".