[POTENTIAL FIX/SOLUTION]
Old Thread but in case you are still looking, this simple trick solved it for me!
From the display settings you can toggle which screen to make your main display.
Alternating between the available screens seems to have fixed the issue for me.
e.g. you have 2 screens (A and B), set monitor A as main display -> set monitor B as main display = profit!

Here is a way if you have Autohotkey to scroll the mousewheel up/down at the very top of your screen only to adjust brightness.

#NoEnv SetWorkingDir %A_ScriptDir% CoordMode, Mouse, Screen #SingleInstance, Force #If MouseIsOvertop() $~WheelDown:: send, !{PGDN} return $~WheelUp:: send, !{PGUP} return #If MouseIsOvertop() { MouseGetPos,,y Return y < A_ScreenHeight - 1070 }

I agree that this would be a very important feature to have. Even in the summer, when the sun hardly sets here at all, I'd still like my computer to cue me at 8pm that it's time to start getting sleepy

@lorna hi i have a microsoft surface pro and i don’t

@lorna "First thing to do: update your video drivers."

Thanks, that fixed it.

Shortcut key: Ctrl + Shift + Win + B

That will reset your video driver.

Yes, it does affect the tint color in the recorded video. You can right-click on the f.lux icon and disable f.lux for a period of time.

Might sound a bit rude, but someone has to tell god damn truth. We want to store brightness level (80–90%) for a GOOD reason, not because of some laziness. Reason is PWM flickering (causing headaches by itself, not to say coming along with annoying pitch noise) when (not that modern) display’s built-in brightness is set lower than 100%. Google for details and do reconsider storing brightness as many similar apps already do (Iris, Redshift, Gammy to name a few).

@herf sorry for necroposting, but I'm experiencing the same kind of flickering with F.lux 4.119 in Windows 10 v2004 with Nvidia 461.40 drivers at 3840x2160 60Hz 8bpc YCbCr420. It's identical to Youtube video in OP, and goes away when I exit F.lux.

That is something I also wonder, F.lux has been around for a long time and there is still no option to manually enter an app in the list.
When I start the game Warhammer: Chaosbane, the shutdown doesn't work.

thankyou so much that was very helpful
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@mb1285

I figured out how to do it manually with the monitor RGB settings.

I'm doing ok with two monitors, and these two settings: 2400K and 3400K

Manually reproduce flux on your monitor - Technicus . . . Research suggests that f.lux must talk directly to display hardware to work – no remote desktops . . . The monitors allow me to manually select RGB percentages. The trick was translating 3400k (f.lux setting) to percentages of red, green, and blue . . . Searching Google for the RGB values of 3400k revealed this page . . . 3400k translates to the hex values #ffc184 . . . The last step was translating that hex to percentages. Googling “ffc183 in percentage rgb” revealed this link . . . 100% red . . . 76% green . . . 51% blue . . . [on a scale of 0 to 255? close, but use the conversion web page values] . . . R 255 . . . G 194 . . . B 130 . . . https://techblog.jeppson.org/2014/12/manually-reproduce-flux-monitor/

What color is a blackbody? - some pixel rgb values . . . get the hexadecimal codes here, first column, 1000K to 7800K . . . http://www.vendian.org/mncharity/dir3/blackbody/

Hex RGB Colour Converter . . . enter the hex colour, get the RGB colour:(255-based) and RGB colour:(Percent-based) . . . https://andylangton.co.uk/tools/colour-converter

Color temperature - Wikipedia . . . see: Categorizing different lighting . . . https://en.wikipedia.org/wiki/Color_temperature

2400 K #ff9d3f Standard incandescent lamps . . . HP E272q
255,157,63
(255,157,63)
rgb(255,157,63)
rgb(100%,62%,25%)

3400 K #ffc184 HALOGEN . . . Per f.lux . . . HP 1755 . . . These settings work on the HP 1755, but aren't very orange on the HP E272q
255,193,132
(255,193,132)
rgb(255,193,132)
rgb(100%,76%,52%)

Maybe here you can find some solution

@mrloho Replying to my own comment. Actually this^ does not fix the problem. It only temporarily resolves it.
My screen keeps putting on a permanent orange tint event after above solution. The following suggestion will make it so it will flash orange occasionally, but stay regular colors other than that:

Reinstall f.lux set it to always be on set it to be as white as possible (for me 6500K)

Still voting this up…

This explains why the news channels use the blue digital lights on television instead of red. It makes it so people stay up and melanin isn't being produced that way people don't get sleepy and watch the news then the news channels makes more money when people are up.

Well it's the end of 2019...