I solved it by myself! I´m so smart...
Google-the-great found this:
In "EXBworksmart" long answer lies the solution #1: disable bidirectional communication and shut up the printer.
Solution #2: Never buy HP again. I lost $2500 in my HP notebook because it featured a nVidia video chip, which on regular PCs come with a hetsink and sometimes a fan, but on my HP note it was bare naked, not a single piece of metal to spread the heat. The note had an AMD processor, it was hot, and the video chip broke the BGA solder.
Just to finish, I bought a cheap Brother Laser printer HL-1112. No scanner, no wifi, no colors, no fax. But I can leave it off for years and it will print right away. Obviously any HP laser printer would act the same way, but why should I buy from an inferior brand that is only good at marketing?
Brother printers do the job, the toner cartridge is separated from the drum cartridge yielding lower maintenance cost, AND NO NASTY "BROTHER REWARDS" POP-UPS!
Now I´m going to call brazillian tech support to teach them. Wait... why bother?
No offenseses in this mail, only the truth.
