Arch Linux

Del.Mar

Member

Registered: 2023-01-01

Posts: 7

Wayland Gnome and brightness

Hi mates!
Is there solution to change brightness for Wayland?

I have Nvidia video card. Xorg setup has xrandr utility to change it and .xinitrc for apply settings on boot. What about Wayland or gnome?

V1del

Forum Moderator

Registered: 2012-10-16

Posts: 25,297

Re: Wayland Gnome and brightness

There's no "Wayland" in this context but depends on your compositor, the relevant option must come from a GNOME GUI. Also in a more general context the xrandr brightness switch does not actually change screen brightness but simply dims the rendered image. If this is a desktop card/system you usually adjust real screen brightness on the monitor directly or with e.g. https://wiki.archlinux.org/title/Backli … l_monitors

Del.Mar

Member

Registered: 2023-01-01

Posts: 7

Re: Wayland Gnome and brightness

Thanks for reply!

[user@beast ~]$ ddcutil detect
Display 1
   I2C bus:  /dev/i2c-2
   DRM connector:           card0-HDMI-A-1
   EDID synopsis:
      Mfg id:               BNQ - UNK
      Model:                BenQ GW2760HS
      Product code:         30922  (0x78ca)
      Serial number:        29G00327SL0
      Binary serial number: 21573 (0x00005445)
      Manufacture year:     2016,  Week: 38
   VCP version:         Detection failed

[user@beast ~]$ ddcutil capabilities | grep "Feature: 10"
Unable to get capabilities for monitor on Display_Handle[i2c-2: fd=3 @0x55ea1a1af5b0].  Maximum DDC retries exceeded.
[user@beast ~]$ ddcutil getvcp 10
VCP code 0x10 (Brightness                    ): Maximum retries exceeded
[user@beast ~]$ ddcutil setvcp 10 80
Display not found

No display found, but detected. How to fix it?

Last edited by Del.Mar (2023-01-01 16:56:25)