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I've got an e-ink display and would like to disable redshift on just this screen, but keep it enabled on the other two monitors. How do I setup this? Is it possible to increase contrast as well? (The Chrome high contrast extension is good for the browser.)

Peter Mortensen
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jeff
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1 Answers1

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Okay, I figured out a solution for me. Run:

redshift -m randr:crtc=2 -O 9000 for the redshift-disabled third monitor (sometimes I use 8000).

And run

redshift  -m randr:crtc=0 -O 3000
redshift  -m randr:crtc=1 -O 3000

It's my color temperature for both the other monitors.

David Foerster
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jeff
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  • Big thanks for showing how to select monitor adjusted by randr. The official page says about screen attribute which doesn't work. But putting the below section in the redshift.conf file does the job of selecting the first monitor:

    [randr] crtc=0

     – Krzysztof Tomaszewski May 18 '23 at 06:29
  • Yes, it seems to be mentioned here in this issue, because screen targets an "X screen" that can span through multiple monitors. crtc is the way to go if you want to target single monitors. This also did the trick for me. – Yosko Sep 24 '24 at 13:29