Made some progress on my monitor "measurement" application I'd like to share here: https://1drv.ms/b/s!AkD78CVR1NBqkpdCEnWYVaM-klEx1w?e=DYRi7Q This time, I used a "classical" 8-bit workflow, i.e. sending 8-bit RGB values to the monitor, from 0 to 255, while the video driver operates at a 10-bit level. What I like about this graph is that it clearly shows a non-linear relationship between input RGB and measured output Luminance. I have Gamma = 2.2 selected in Multiprofiler. I think the results speaks volume about the ideal relationship between inputs and outputs in that each RGB code value on the input corresponds to its own, discrete Luminance value on the output. / Roger