Ubuntu – Night light and Redshift don’t work

18.04colorsgnomescreentemperature

I installed Ubuntu on a disk partition just two days ago and everything work like a charm. The only problem I'm having is with the screen temperature color. In Windows I use f.lux and I set the color temperature as red as possible (3500K) all-day-long. I want to do the same in Ubuntu but I faced many issues:

  • f.lux doesn't change the color at all
  • Redshift changes the temperature for a couple of seconds, then it suddenly goes back to the normal color
  • GNOME Night Light has the same problem of Redshift: the change is not permanent although I set the color temperature to be 3500K from 5AM to 3AM

Is anyone having the same problem? How can I fix it?


System info:

  • Ubuntu 18.04.1 LTS
  • GNOME 3.28.2
  • External monitor HP 24" 60,00 Hz

Best Answer

I found that for Night Light I have to set it to manual mode and set the start time to some time before the current time and the end time sometime before the end time.

I was perplexed for a while because I assumed that, like all other widgets in Ubuntu, setting the switch to on (green) would just turn Night Light on.