The actual fix is, disable Microsoft's Night Light feature in Windows 10. The flickering is caused by a conflict between Night Light and f.lux. Turning off Night Light is the solution. Anything else that solves it is just "a Band-Aid solution", and is therefore incorrect.
Hey all, reviving this thread for future f.lux users. I tried TwoCable's fix and it worked perfectly. Turn off Microsoft's Night Light feature in Windows 10/11. The night light feature effectively does a similar thing to flux (reduces blue light), and it turns on at a certain time every day. This is causing Flux to flicker at X:00pm sharp.
@manuelallgaier we will probably do a more programmable thing like this in the future.
We decided not to do it as a one-click option because I found it extremely limiting for some kinds of work. And the main thing is that we don't have a good interface to do a fine-grained disable (like "give me some color back but don't disable f.lux entirely" is hard to do in a simple way). I will think about ways to simplify the interface so we can have this and have a way to turn it off sometimes too.
If your laptop display isn't working, but you can see it on an external monitor, the problem is with your laptop's screen and not its connection. If this is the case, then start to diagnose why there might be a disconnection between your computer and its screen
Here is a way to scroll the mouse wheel up/down at the very (top of your screen only) to adjust brightness.
NOTE* you must have Autohotkey installed and run the script. If you don't have Autohotkey, then message me and I'll give you the .exe file.
I have mapped scroll wheel to F.lux default shortcuts Alt 'PGEUP/DOWN' so the default keys will still work but the scroll wheel is better and faster.