could you elaborate?
i've been just dealing with this problem for an embarrassing amount of time now, and have gone through several version updates of the nvidia drivers with this problem persisting. i've also tried reinstalling the nvidia drivers with no change.
nothing in between the computer and monitor - it's just plugged straight in. my current guess is that some step of pacman's install/update process changes something that also gets changed by something else (DE, config file, idk) after the boot.