Thanks @jawys just had problem with that on my 16.04 Ubuntu MATE laptop and found your ppa :)

@Tungsten_smooth Thanks. After downloading and installing xflux to /usr/sbin/xflux everything works fine!

@Tungsten_smooth I'm with out on that one!
I guess that's where the saying comes from:

'Linux is highly user friendly, it is just highly selective who it is friends with' <-- It's definitly not with me :D

@kungfujam Yes, with the updated color tables, I'll say this one gets very close, I've done pics A/B of 5000K and 2700K and they are EXTREMELY similar. The f.lux team is very busy so it won't be soon that they update.

I don't think f.lux on Linux works with multiple monitors, so they'll need to fix that as well.

@apcks said:

@mari0

what should a person do if they get this message after performing the above steps.

Welcome to xflux (f.lux for X)
This will only work if you're running X on console.

No protocol specified
Couldn't open display (null)

Try using DISPLAY=':0' before xflux.
DISPLAY=':0' xflux -l x - g y ...

@Henke said:

The only thing I really miss is Photoshop, other things i've got covered with as you say, equally good or better apps. Even games are starting to catch up, usually no big titles, but still.. good enough games for me to stay on Linux.

Same goes for my gf. If it wasn't for photoshop, her laptop would already be under linux.

Yes we would have to recompile it. I was running an OpenIndiana box (for ZFS) until very recently!

@kevinkrg6 it's for debian, so try xflux and see what you get, don't use the commands in the white box on the linux page.

Would really appreciate f.lux on fedora. I am having the same issue, cannot install on Fedora 23

hi!
i really wanted to use f.lux also on my linux boxes .. but the more feature-complete "redshift" made my switch a no-brainer ...

@gpunktschmitz with xflux, you should be able to change the daytime color level, I haven't used it in a long time, so you're on your own. Xflux is on the f.lux linux download page, at the bottom.

It shares code with "flux core" so we can build a new version - in fact, the version on Android is somewhat similar.

What is missing is: the GUI is a volunteer effort, and we need developers to pick it up, and adding all the UI for the new features is not simple.

And yes, it is closed source, but our goal is to avoid people forking our bad assumptions and baking them into their OSes! Not that it seems to help so far. :)

@websterhamster I have no idea, I don't think that one works on newer versions, just use the xflux stuff at the bottom of the page. It's commandline driven, but it's easy to use.

$ xflux -l 01234 -k 1900

(omit the $, and -l is an L, for zipcode in the U.S. only). For outside of U.S. use -h for a list of commands for lat and long.

@Amit-Patil Ah, you'll want to (maybe not want to, but it will work better) use the newer f.lux daemon below those install instructions, called xflux. It's easy to run. Also search the linux forum section and you'll find more information here.

Since you say, you should do a version for RPi, are there already any plans for doing that? Or is it just an idea at this point? Just curious, cause I really like that awesome piece of software and using it on my Windows system, but have an RPi as a media centre.

@Abdul-Basit totally agree with you i am huge fan of f.lux team and using it on my pc laptop tablet when i use my windows my eyes starts to dry and blur so really we need f.lux for windows phone