Ubuntu
nvidia-graphics-drivers-460 package

  1. Bug #1905591
  2. Comment #31

Comment 31 for bug 1905591

Revision history for this message
Shubham Paul (paulplusx) wrote (last edit ):

Now, it works for me (ubuntu 20.04.3) with the kernel (v5.11.0.34.36) parameter

nvidia.NVreg_RegistryDwords=EnableBrightnessControl=1

And nvidia drivers 460.91.03. No need to do anything else (except of course update-grub).

The parameter is mentioned in arch wiki

https://wiki.archlinux.org/title/NVIDIA#Enabling_brightness_control

This is all for discrete mode. Credits to @Chaplan from legion discord for finding this.

For hybrid mode, there is different kernel parameter (for AMD)

amdgpu.backlight=0