Dual monitor setup: different gamma

I am running KDE/X11 with two monitors.

Screen 0: minimum 8 x 8, current 2944 x 1280, maximum 32767 x 32767
DP1 connected 1024x1280+0+0 left (normal left inverted right x axis y axis) 380mm x 300mm
   1280x1024     60.02*+  75.02  
...
DP2 disconnected (normal left inverted right x axis y axis)
DP3 disconnected (normal left inverted right x axis y axis)
HDMI1 disconnected (normal left inverted right x axis y axis)
HDMI2 disconnected (normal left inverted right x axis y axis)
HDMI3 connected primary 1920x1080+1024+101 (normal left inverted right x axis y axis) 530mm x 300mm
   1920x1080     60.00*+  50.00    59.94  
...
VGA1 disconnected (normal left inverted right x axis y axis)
VIRTUAL1 disconnected (normal left inverted right x axis y axis)

Is there any way, I can alter the gamma value on my HDMI3 display only? DP1 looks nice, but the other display is too bright/washed out.

You might be able to achieve what you want to do with xgamma available with the xorg-xgamma package.
It also has a gui frontend with monica.
https://manpages.ubuntu.com/manpages/xenial/man1/xgamma.1.html
https://wiki.archlinux.org/index.php/backlight

1 Like

I achieve this method by using xrandr.
Eg:

xrandr --current --output HDMI3 --gamma 1:1:1

EDIT: You can indipendently set the brighntess as well, by set the --brightness flag.

2 Likes

Great! I got good results with --gamma 0.8 as I had no problem with tint :slight_smile:
@D.Dave

Thanks, but I read that xgamma is being deprecated, and one should use xandr for these things. I got it to work with that, see below …

I’m glad it’s fit your need :slight_smile: