12.1 Brightness control for NVidia card with binary driver?

English Hardware
#1

Installed 12.1 and the Nvidia binary driver in a vaio laptop with an Nvidia
card.
I can’t change the screen brightness any more (I could with the default
installed driver).

Can somebody suggest a way to control the screen brightness?
Thanks
-G-

#2

In a terminal as ordinary user, try the command “xbacklight”. It should report the brightness setting. For options controlling brightness, enter:

xbacklight --help
#3

consused wrote:

> In a terminal as ordinary user, try the command “xbacklight”. It should
> report the brightness setting. For options controlling brightness,
> enter:
>
> Code:
> --------------------
> xbacklight --help
> --------------------

Thanks for the clue, consused. I did not know about this command, but
unfortunately it responds:
“No outputs have backlight property”

-G-