János, Tóth F. wrote: > Possible bug: contrast is notably clipped on the higher end of the > calibration LUT > > RGB_I RGB_R RGB_G RGB_B > 1.0000000 0.9105900 0.8348000 0.9275700 Hi, you're asking for a specific brightness that exceeds what the display is capable of (200 cd/m^2) and a non native white point, so some sort of device model is needed to clip the white aim point before calibration can commence. An additive model is used, so there are two possible explanation of why one of the device is not 100%: Either the display is not very additive causing an inaccuracy in the clip calculation, or perhaps it's brightness changed during the calibration. For instance, if this is a fluorescent backlit LCD display, maybe the light has warmed up and increased in brightness. If it's the latter, then letting the display brightness stabilise for longer before calibrating, or perhaps using -Iw could reduce this effect. Doing an uncalibrated display report after the calibration as well as before could give a clue if it's a display brightness change. Graeme Gill.