Comment 2 for bug 1000923

I forgot to write that while trying to print a self-test page for both printers, the printers take their time and finally print an ASCII text as follows:

"
%!
   userdict dup (\004)cvn{}put (\004\004)cvn{}put

                                                                    % You are using the wrong driver
"

I've checked the installed drivers and they seem correct:
HP Officejet 7500 e910 hpijs, 3.12.4
HP PSC 1500 Series hpijs, 3.12.4

Please help!