I bought a new printer today (HP Officejet Pro 8022e). When it is connected to the laptop with the USB cable, it prints this test page over and over again after a few moments… It can't be serious, can it? Can someone help me?
Try this (most of it in English, unfortunately):
https://www.solveyourtech.com/stop-hp-laserjet-from-printing-status-notifications/
https://www.solveyourtech.com/how-to-make-my-hp-laserjet-p2055-stop-printing-an-extra-page/
Otherwise you can find more if you search for "get /devmgmt/mediahandlingdyn.xml".
I checked it, but unfortunately this point is not listed on the page.