I have the same problem. It looks like the flux profile is temporarily disabled. I have a dual GPU macbook pro, running Mavericks.

gfx.io shows that the GPU is in discrete mode all the time, while the flashing does occur. So I don't think the problem is caused by switching GPU's.

Automatic screen brightness adjustment is turned off. And thus the flashing also occurs when brightness is constant.

How could this be fixed? I'd love to use flux, but the flashing makes it unusable.

Are you on a machine with dual GPUs maybe? There's no content that can do it, officially, but there are ways the GPU can get confused.

@lorna: thanks for your response. I have for an app which is not open when this behavior happens.

@timpster: thanks, but the monitor isn't very consistent in rendering text well in different apps and I have to often tinker the settings to get back to sharp text rendering.

As to your other question, I have Intel Iris 1536 MB on my Late 2013 Macbook pro with 2.4 Ghz i5 and my colleague has a Macbook Air, 1.7 Ghz i7, Intel HDGraphics 500.

@stryke said:
I have to quit flux and launch again so that preferences window will open.

Have you tried restarting the computer, or does this still occur?

This helped: https://discussions.apple.com/thread/7058719?start=0&tstart=0

I deleted the ByHost folder in /Library/Preferences. Now it works.

Gah, yes, thanks Tim. We just updated the forum, hope that this helps.

I think reboot fixed it, or probably some app was causing this.

@herf,

Thanks for your help here - it's now working fine.

M.

You can also disable bedtime mode by pulling it all the way to the right (or choosing "classic f.lux" in the menu).

Above 3400K, we just turn off the mode entirely.

We would love to release it. Hope to have news on that front soon.

@d675 If you're using a Mac, you can always set your wake time for the next morning. f.lux works the way it does based on the human circadian clock which needs a strong and regular light / dark schedule. We know the whole world doesn't have that luxury, and we are exploring ways to help people with less regular schedules. Thanks for your feature requests.

Love notes like this! @timpster with over 10 million installs there are bound to be some hardware issues, but I think we're doing pretty well. ^_^

Yes it is as he said.

Whenever I restart my OS X Yosemite 10.10.4 my default dark theme is changed to white theme because of F.lux.

Its a bit annoying.

I'd say, see if f.lux has firefox as disabled? What I mean is, you can "disable for app" and maybe you selected firefox.

If so, try this in the daytime:
Open firefox, then reopen f.lux from the applications menu.
Then, in the right click menu for f.lux look at the "disable for app" and see if firefox is selected.

Thanks - we initially did the v30 UI with the full preferences menu appearing on click. This was the idea anyway.

But this turns out not to be as easy to do on 10.6 (!) so we rolled it back, which is why the current thing is a bit clunky.