[naoru]

By some weird coincidence I've been trying to make a wide gamut display work properly on Windows just yesterday. Short version: no success. We're so close but still so far.

Long rant: I've got a Windows 10 machine with NVidia graphics, a company issued Windows 11 laptop with an integrated Intel GPU and a fairly recent Macbook. The display in question is MSI MAG274UPF, which can be considered wide gamut.

Mac (presumably) pulls RGB primaries from the EDID and performs the necessary gamut mapping without losing the ability to display images in P3 space. Colors are perfect, wide gamut tests pass, everyone's happy.

Windows 10 has no idea what to do with WCG and displays everything in ultra vivid, extra saturated colors even after trying to mess with vendor-provided ICC profile. WCG tests fail.

Windows 11 should have Auto Color Management, which in theory should bring us roughly to feature parity with macOS, but for some reason it allows me to turn it on only on the laptop's internal display, which has ~60% sRGB coverage. Apparently Windows does not want to enable gamut mapping in SDR mode on HDR certified displays, even if they conform only to DisplayHDR 400 specification, which is an abomination in itself. Results are the same as with Windows 10.

My disappointment is immeasurable. We could have proper WCG support in Windows world.