Xorg framebuffer and brightness of screen

[Alex Deucher]

On Wed, Nov 10, 2021 at 2:15 AM Riza Dindir <riza.dindir at gmail.com> wrote:
>
> Hello All,
>
> I woukd like to know if I can adjust the screen brightness when using the framebuffer device on xorg?

If it's a legacy fbdev device, it probably exposes the backlight via
the kernel backlight interface:
https://www.kernel.org/doc/Documentation/ABI/stable/sysfs-class-backlight

Alex