@kenniky we have one other post today with a 2021 Intel driver (10th gen Intel) and the ".3448" update not working. Can you look for an update to the Intel UHD driver?
https://www.intel.com/content/www/us/en/support/products/211968/graphics/processor-graphics/intel-uhd-graphics-family.html

@santafedaisy can you post f.lux options > driver info?

@flux_user_55 Windows is reporting it "should" work, but clearly it isn't. Do you know if HDR is turned on? f.lux may not work with it.

Otherwise, the "9621" driver from 2021 for your GPU is pretty old, but it does seem to be the one Microsoft is still shipping - I wonder if they missed something. You can get an update directly from Intel, but usually for Surface it wouldn't be needed.

@santafedaisy Can you post f.lux options > driver info?

@aimmyarrowshigh We are not VMware experts, but you may wish to try updating the 2019 driver in particular.

@apollo606 Mine also I loved F.Lux in the past now with the Asus Pro Duo it only works for the Main Display. The one at the bottom does not work at all even after restart.

@herf God damn dude, sick work. Thanks for making me go to sleep better for the past decade.

If anyone finds this issue, the solution was to use a white balance LUT to fix the color temperature.

Solved with a Power Cycle to the Hue Bridge and a repairing.

I had previously re-paired with the bridge, but had not power cycled the hue bridge itself. Doing both seems to have been needed.

@PanzerIV88 is this an ICC issue or a HDR issue? We think we are loading ICC properly, so if you have one that doesn't work please email support at justgetflux.com

Just to update, this continues in Win11, though that's not a surprise. Has anything in the ensuing years made it possible for there to be a permanent way to handle this?

@herf
Sorry for reopening this and I am not even sure there is anything you could do on your end.

With the registry flag it does indeed change the Windows theme as well, at least according to the setting ("Personalise" - "Colors" - "Chose your mode") Flux changes it completely to 'light' and 'dark' respectively, but the issue is that the setting is not actually applied for the Windows part, only for the app part.

Hope this makes sense. I.e. the apps are correctly changing colors automatically, but things like the Windows task bar will still display the earlier setting, even though the setting value is changed in Windows.

I understand that this is likely some type of Windows bug in how it manages the transition and not something you could fix on your end, but still thought I mention it to have it at least documented.

Agree this is a critical feature. The whole point of f.lux is to prevent bright, blue light late in the day, but that's entirely defeated, and then some, when switching out of a game or a full-screen video and having a browser or other app suddenly blast a blinding white light. I set it to the gaming transition mode, which mostly helped (though still sometimes it would take a split second or so to react, so not perfect), but then it goes from full brightness to dim and orange suddenly mid-evening, which is also not ideal. I love f.lux, but this issue definitely makes it more difficult to use which also makes it a bit harder to recommend to people.