Today I burned the latest snapshot in a USB pen-drive and booted it in a HP desktop of mine where happened this:
https://marc.info/?l=openbsd-bugs&m=156682947025229&w=2 It seems to be fixed, the card is now recognized out of the box as 1000baseTX as expected. :-) (I didn't change anything in my LAN, the machine is connected to the same cable to the same router as it was at that time.) Does someone know or have a clue which change fixed this issue? Walter