f.lux doesn't work properly with dual monitors when both are calibrated and using different ICC profiles
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Windows 10 Pro 21H1
On my system, I have two Asus PB278Qs connected via DisplayPort to an Nvidia GTX 1070.
I have them both color calibrated (using a colorimeter) separately, and both have different ICC profiles.
Now that they both have their own profiles instead of sharing the same generic PB278Q profile, f.lux only appears to apply to a single screen (the primary).
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Can you post f.lux options > driver info so we can see the details?
This sounds similar to a configuration we have here (which is working as it tends to always work here!)
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--------------------------- Driver info --------------------------- The information below is already on the clipboard. Paste to the f.lux forum or email us for help. NVIDIA 30.0.14.7212: NVIDIA GeForce GTX 1070 (20210913) NVIDIA 30.0.14.7212: NVIDIA GeForce GTX 970 (20210913) ASUS PB278, 597 x 336mm, built 2014 Chromaticities: R=0.666016 0.330078 G=0.309570 0.629883 B=0.150391 0.040039 W=0.313477 0.329102 sRGB gamut: 99%, AdobeRGB gamut: 69% ASUS PB278, 597 x 336mm, built 2014 Chromaticities: R=0.666016 0.330078 G=0.309570 0.629883 B=0.150391 0.040039 W=0.313477 0.329102 sRGB gamut: 99%, AdobeRGB gamut: 69% Unlimited gamma ramp=1, Internal ramp=1 Monitor 1 on NVIDIA GeForce GTX 1070 Has VCGT profile=1, Gamma Ramp works=1 Monitor 2 on NVIDIA GeForce GTX 1070 Has VCGT profile=1, Gamma Ramp works=1 Windows Build: 19043.1288 --------------------------- OK ---------------------------Color-wise, they both calibrated substantially differently, and are using two different ICC profiles.
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Okay we do know that NVIDIA has some settings in its own control panel that override color settings - can you check for "reference color" mode or something like that in the NVIDIA Control Panel? It should be turned off for f.lux to work.
