How do you calibrate your monitor on Linux?
I use DisplayCAL, a GUI (and more) based on Argyll. And I use X11. Wayland appears troublesome for color management:
From Argyll I read:
"As a consequence there is little prospect of ArgyllCMS being able to support display calibration and profiling for Wayland.
So my current advice for people wanting to use a color managed display on Linux is to stick to X11."