New comment by mayhair on void-packages repository

https://github.com/void-linux/void-packages/issues/48876#issuecomment-1962965831

Comment:
> This is a consequence of configuration choices made in the `gdm` package. While some users may want the brightness slider to work out of the box, other users may not want the `gdm` user to be assigned a valid login shell or may wish to restrict access to brightness. Some configuration may be necessary to get some software features to work as expected.

Could the steps to let gdm change the brightness at least be listed in the Void Docs? There isn't really any clearly documented way to enable it otherwise.