'Redshift toggles on and off (flickering)

I installed redshift on ubuntu 16.04 to reduce blue light. However, when I turn it on, it toggles on and off every 1-2 seconds continuously. I ran it in verbose mode (redshift -v) and this is the output:

Temperatures: 3500K at day, 3500K at night
Solar elevations: day above 3.0, night below -6.0
Brightness: 1.00:1.00
Gamma (Daytime): 1.000, 1.000, 1.000
Gamma (Night): 1.000, 1.000, 1.000
Status: Enabled
Period: Night
Color temperature: 3500K
Brightness: 1.00

The location is set as well.

linuxubuntuscreen


Solution 1:[1]

I had the same problem. For me, I had a redshift-gtk process running in the background and didn't know, so when I tried to launch a new one after making some changes, they began fighting with each other. One making the changes I wanted, one then reapplying the default config and causing what seemed like a flicker. What I did was:

  • alter settings via the ~/.config/redshift.conf file. (example here: http://jonls.dk/redshift/)
  • kill the running redshift process(es) pgrep redshift | xargs -n1 kill -9
  • restart redshift redshift-gtk & disown

You should see an icon in the upper right that looks like a light bulb that will allow control of reshift. And hopefully no more flickering!

Solution 2:[2]

If you are running Gnome or have updated to Ubuntu 18.04, then the Night Light feature may be conflicting with Redshift. Try disabling Night Light in Settings -> Displays.

Solution 3:[3]

I had this problem also. For me I had to use a combination of-

  • reset the screen redshift -x

  • then I used user.friendly's pgrep redshift | xargs -n1 kill -9 to kill the process

For some reason my system decided to reapply the redshift hue after a couple of seconds of using redshift -x.

So... I had to reset then kill the process with the above kill command whilst it wasn't set.

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution Source
Solution 1 user.friendly
Solution 2 tbenst
Solution 3 Byron

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