On Linux, there is a very comprehensive CLI utility called ddcutil: https://github.com/rockowitz/ddcutil https://github.com/rockowitz/ddcutil The same author a

On Linux, there is a very comprehensive CLI utility called ddcutil: https://github.com/rockowitz/ddcutil https://github.com/rockowitz/ddcutil The same author also made some kind of UI for it but I haven't used it so I don't know how it looks or performs: https://github.com/rockowitz/ddcui https://github.com/rockowitz/ddcui