Uhh displaycal? I think is the program. Last I looked nothing worked right in Wayland or gnome, so if either of those are in your setup it’s worth getting rid of em. You’re not gonna like my practical tip: generate a profile on Windows or mac computer and copy the profile to the linux machine. I don’t know what you’re actually trying to accomplish so if that’s not absolutely secret squirrel shit maybe lay it out but my other advice is the same as the first verse: use a mac instead of trying to colorimeter a linux attached display. Unless you’ve shelled out for a very good monitor, use a mac with a built in display.