Redshift: Ability to configure different screens separately

Created on 10 Jan 2015 · 7Comments · Source: jonls/redshift

In some cases (e.g. using different monitors or even worse a monitor and laptop display without a hardware settings configuration) it would be useful to have and ability to define a temperature (temperature, brightness, gamma) separately for different monitors.

I don't know if required information is available, but Redshift could detect the given monitor (to no rely on screen id).

enhancement

Source

szpak

👍7 ❤1

Most helpful comment

I would love this. I have a big screen hdtv connected via hdmi, and redshit reddens it. really annoying ;-)

leethax666 on 25 Nov 2016

👍3

All 7 comments

This has been implemented in some pull requests, but I do not know if they are mergeable anymore.

maandree on 10 Jan 2015

I second this request. My secondary monitor is different from the primary and it is hard to get them to look exactly alike as far as temperature, brightness, gamma go. Thanks.

kzilla-git on 21 Jul 2015

👍3

I would love this. I have a big screen hdtv connected via hdmi, and redshit reddens it. really annoying ;-)

leethax666 on 25 Nov 2016

👍3

Would be pretty awesome, my older panel on the left just isn't capable of same level of brightness as the newer panel on right hence my need for this (camera filter screws colors quite a bit, but the difference is very much noticeable). Probably gonna fish for pull requests that @maandree mentioned to see how feasable would it be to get it running.

case in point:(

tpruzina on 25 Jul 2017

Yes, please. I need this.

damaru2 on 1 Aug 2019

It seems one can do the trick with this https://github.com/jonls/redshift/issues/23#issuecomment-200098220

damaru2 on 1 Aug 2019

👍2

The solution in #23 (redshift -l <lat>:<long> -m randr:crtc=0 -t <day-mon1>:<night-mon1> -b <day-mon1>:<night-mon1> and redshift -l <lat>:<long> -m randr:crtc=1 -t <day-mon2>:<night-mon2> -b <day-mon2>:<night-mon2> ) creates some crazy flickering for me.

For some reason, I get no flickering if I set the same thing through 2 config files:

the regular ~/.config/redshift.conf
and a 2nd file ~/.config/redshift_external.conf

I still have 2 running instances of redshift (I launch the second with redshift -c ~/.config/redshift_external.conf), so it is really unclear why this works and the other one not. But I thought that I would share in case it helps someone.