As for the darktable part. The preview refers to a second monitor…do you have 2…if not doesn’t likely matter what goes in there. As for the display profile. I add the icc I want to use for the display to the config/color/out directory…I would have to look it up for Linux…its under Appdata in Windows. THat way you know what profile is being used and you let DT handle that. At least that is what i do for Windows… I don’t trust the OS to put or pass the correct info to DT…