@zwerg12 I've started to use #DisplayCal with my Spyder 5 HW on #LinuxMint as FlatPak. DisplayCal seems to work, and far more competent than I am on calibration. I generally avoid FlatPak, and I think two issues I have seen with DisplayCAL are releated to the, by design, limited access FlatPak has to the system. If I explore further and learn more about giving FlatPak access, my DisplayCAL will probably work better although it seems to work acceptable as it is.