After changing my GPU from nVidia to AMD the ASUS PG278Q display is all black. https://www.reddit.com/r/archlinux/comments/ovrq8o/edid_not_readable_by_mesa_but_working_under_nvidia/
https://rizvir.com/articles/asus-PG278Q-in-linux/
xrandr --newmode "2560x1440" 241.5 2560 2608 2640 2720 1440 1443 1448 1481 -hsync +vsync
xrandr --addmode DP1 2560x1440
xrandr --output DP1 --mode 2560x1440