Thanks for this feedback @David-J.-Bookbinder - appreciate you taking the time to spell it out for me

@herf Thank you for continuing to incorporate increasingly complex features. They are fun and the scientific basis is fascinating!

All you have to do is go into the f.lux options and change the setting under "How quickly should transitions happen?" There are 3 options:

"Slow: Natural Timing" "Medium: Adapt your eyes" "Very Fast: Gaming"

Hi, thanks for this info.
I followed the instructions and ended up with my USB displaylink monitor no longer displaying f.lux colours at all! I had some idea that maybe the displaylink beta drivers hadn't installed properly since the driver version was displaying as 8.0x not 8.2 so I uninstalled the drivers and then tried again. Next I kept getting a message to say the driver was already up to date (which I had earlier when I tried to install the drivers and at that time I believed it, but I think it might have been just not installing properly and telling me fibs). Tried uninstalling the displaylink core (which was from 2016 and saying it was version 6) in case this was disallowing the new driver installs, and then I had to restart, but I ended up having a windows update install at the same time as this reboot. As far as I can tell right now the USB monitor is running on Microsoft generic drivers and this seems to be working fine with f.lux so for right now I'm going to leave well enough alone. Looks like I'm on windows 1709 now so maybe this has changed something.

Thanks for helping me out!

Just to confirm, I just finally found the graphics driver and it is updated. It's Intel HD Graphics 3000. Windows 7 64-bit, Thinkpad x220. The f.lux icon on the bottom left indicates that the program is on, but the color shift is not happening (to make sure my eyes hadn't adjusted, I clicked "disable for one hour" and the color stays the same) on my laptop - but it's fine and working on my second display.
Thanks.

thanks, that worked :D

@poor-man Glad to hear you are back online. This f.lux update does ask you to reboot (so it can apply stronger color settings).

I'll try QuickGamma. Thanks. : )

@Davoun-Stojka Can you post which version of f.lux you have running and which version of Windows?

@GUNEROO7 said in How do I disable flux on startup?:

@TwoCables I could have sworn there was an option but now I'm guessing I just did this a while ago and forgot, thank you very much for your help.

You're welcome.

I can confirm that v3 didn't have such an option because I had to use this trick for v3 too.

sorry - this is in our FAQ:

If you use a Spyder, the software profile loader may cause f.lux to flash periodically. You can disable the Spyder software on startup, and use f.lux instead to load the profile. Also, when you're calibrating a display, you'll want to do the opposite and quit f.lux before you do.

Ouch!

If you could do me a favor, the v4 beta (only a few changes ahead) will print out some extra information that we can use to make sure this doesn't happen for anyone else!

https://justgetflux.com/flux-setup4.exe

And then in the Options click "Driver Info"

It won't turn the option back on just will print the reason we thought it should be. :)