v4.120 update (June 2021)

  • Hey everyone - we think we have figured out why newer graphics cards are sometimes giving "red" artifacts. Sorry that it has taken a while.

    If you are having this problem, please help test our 4.120 version here:


    Please note: we have just renewed our code signing cert today, so there will be a SmartScreen warning for a few days, but as long as it says "F.lux Software LLC" you can go ahead and install safely.

    What's new

    • Fixes for “red pixels” (overflow artifacts) on Intel Xe
    • Updated Philips Hue endpoint for better bridge discovery
    • Color profile safety checks (excluded large gamma values in ICC/ICM VCGT “formula” profiles to avoid washed-out screens)

    As before there is a possible bug/conflict with Windows reloading the color settings and a workaround:

    • In Windows build 19041 (20H1) and later, you will see f.lux reset by the Display Settings panel in Windows. Also, occasionally a notifier will do the same. If you do not like this, you can choose f.lux options > Always use Windows internal color table to prevent it.

  • Fixes for “red pixels” (overflow artifacts) on Intel Xe

    After just 5 minutes of testing it's looking good.

  • Made an account just to say thank you very much for fixing the artifacts on Intel Xe. Appreciate you looking after your user-base and fixing bugs. I love f.lux!!

  • I really love this application and have been using it for years but recently it now has been showing up on discord streams and turning them into completely orange washed out messes and really has been annoying m. I hope that this could be fixed or if anyone has an solution for this I would greatly appreciate it. But for now i am going to have to find an alternative to F.lux

  • @Benzi Can you post f.lux options > driver info so we can see what's going on? thanks...

  • @herf HDR support when?

  • v4.120 still has the BIG BUG to reset the Display Color settings to White Theme although the suggested option "Always use Windows internal color table to prevent it" is set. This happens every time the App starts.
    Please, fix this issue asap!

    Kind Regards



      Win Pro 21H1 19043.1202


     Intel(R) HD Graphics 520
     Adapter RAM	  1.00 GB

  • @pulsar14
    Problem fixed by myself!!!!
    I had the option “Use Dark mode at sunset” active ... so, It forced the White Theme during daylight and Dark Theme after sunset ...

    A little suggestion:
    It could be practical to add a descriptive tooltip on each settings available to remember the associated functionality.

    Thanks, and good work!

  • Yes - for anyone else who's confused by that: this setting is completely different than the main "f.lux" settings. It's a theme change, not a color calibration change.

  • BTW i posted a new topic but i hope you guys can look into this... when i removed f.lux via add/remove program, it does not do a clean uninstall and i had to manually remove the michael href folder / reference from regedit.

    caused me 2 hours of agony trying to restart my computer, install new drivers etc, cause i thought this program was already "gone"

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