I made a quick test yesterday. I used the "Massive testchart for LUT profiles" from DispcalGUI (2386 sample points) to create a high quality profile for my uncalibrated display (in Standard mode - wide gamut, strange native gamma curve). The result is awful. I converted an image with a gray ramp and it has a lot of banding and colorizations at the lower IREs. I used to get a reasonable (or even nice) grayscale after the VGA LUT calibration. (Because it operates with 10 bit precision, I think...) (Of course, I used the High Resolution mode with default integration times because I didn't have a week to finish the process. But it shouldn't make so big differences.) So, it is a decidedly bad idea for me. But I am wondering about the results with 10 bit/color framebuffers. (To bad that I can't softmod my VGA into a FirePro). Or can it be a limitation of the LUT based profile itself?