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On my phone, I have my screen change it's colour temperature at a specific time of the day in the morning and the night using local time. I also have an option to turn on/off the night mode quickly. I'd like to imitate that behavior on RedShift.

I'd like to configure RedShift to follow the clock blindly and completely disregard both the latitude/longitude I'm in and my local sunrise/sunset times. How may I go about doing this?

Also, redshift-gtk seems to lack an icon to quickly toggle day/night mode. Is there an alternative UI, or must I do this via CLI?

I'm on UbuntuStudio 18.04 LTS (Xfce4 Desktop) BTW.

wingedrhino
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  • I created eyesome: https://askubuntu.com/questions/829814/set-initial-startup-background-brightness-depending-on-daytime/887249#887249 which you can override sunrise and sunset time variables. It has a GUI and controls three monitors independently for brightness (hardware or software) and color temperatures. Also I'm more than happy to update eyesome. – WinEunuuchs2Unix Jul 19 '19 at 14:20

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I am not aware of any good UIs for redshift. I am only aware of good control via CLI. As long as redshift is not running in the background controlling the temperatures you can do command line commands like:

redshift -O 3500 &

or whatever temp you want it to be set to. Then to reset back do:

redshift -x

The reason you don't want redshift running in the background is as soon as you run the -O or one shot mode it will reset it back to whatever it is supposed to be at this time of either DAY or NIGHT within a few seconds.

You can look into adding these lines to a script or add the commands themselves to a cron job where you can set it to run at your own times. I do recommend a script though that runs with a time check on it like https://stackoverflow.com/a/18129042/2012250

Hope this helps!

Terrance
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