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Mitsch
Asked: 2018-10-30 15:03:28 +0800 CST

How do I change gamma on wayland

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On X, I could change gamma by tuning the xorg.conf file and add a "Gamma" line with the right value to the "Monitor Section". How do I do this on wayland? [edit]Or: What's the name of the tool for doing this in wayland and how can I make that config persistent?·[/edit]

configuration wayland gamma

1 Answers

  1. Try ddcutil to set it.

    $ sudo su
# apt install ddcutil
# ddcutil getvcp color

    When I run this, I get this control for Gamma:

    VCP code 0x72 (Gamma                         ): 0x0000 - Mode: White absolute adjustment (sl=0x00), gamma=1.00 (sh=0x00)

    But I think every monitor is different. My Dell 24" doesn't seem to allow changing that entry, but it does allow me to set brightness, e.g, with ddcutil setvcp ...

    So your mileage may vary, but it is worth it to try.

    Also, I haven't figured out yet if gamma is something your set for monitor, or for graphics card? If you are on nvidia, you could also try the nvidia-settting tool.

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