Used #DisplayCal with my #ColorMunki spectro to adjust brightness/contrast/RGB of a VA-type HD monitor tonight; happy I can at least do that basic adjustment, it's miraculous that it works thanks to @hub's Flatpak time capsule of that app. I'm hoping the Python3 version eventually takes over and thrives as a project.
I hope #Wayland color mngt will bring robust calibration & ICC profiles mngt in #GNOME someday; colord has been broken for years, and I don't trust my current Xorg-era ICCs either.