I can no longer can set up a system with cloned (mirrored) monitors using 2 Quadro K420 cards

[generix]

It’s in the docs but in the wrong chapter so nobody finds it that doesn’t already know about it…
https://forums.developer.nvidia.com/t/understanding-nvidia-drm-modeset-1-nvidia-linux-driver-modesetting/204068/4?u=generix