No screen brightness slider on Ubuntu 22.04

Question

Since I installed Ubuntu 22.04, I can't change my screen brightness as there is no slider nor such configs under settings > power. I have no idea what to do.

Already tried to edit grub sudo gedit /etc/default/grub as in 22.04 jammy shows no brightness sliders under Settings > Power but without any success.

Edit: Worth noting that this slider existed in previous versions of ubuntu in this same laptop (not sure about the version, I've been using 22.04 for quite a while now)

I am using a acer NITRO 5 AN515-55-59MT laptop, graphic card GeForce GTX 1650 TI.

Are you using a laptop? There is no brightness slider in a desktop. In case you are using a laptop, please edit the question to add more information about your hardware. — Archisman Panigrahi, Jun 28 '23 at 05:41
@ArchismanPanigrahi Thanks for your help. Yes, it is a laptop. I added more context (brightness slider worked in previous versions of ubuntu) and some info about my hardware. Do you think there is any relevant extra piece of information I should add? — Joao Donasolo, Jun 28 '23 at 13:48

score 0 · Answer 1 · answered Jun 30 '23 at 20:55

find the configuration file related to your nvidia in

/etc/X11/xorg.conf.d/

or

/usr/share/X11/xorg.conf.d/

Add the below lines at the end of the file and save the file.

Section "Device"
Identifier "Device0"
Driver "nvidia"
VendorName "NVIDIA Corporation"
Option "RegistryDwords" "EnableBrightnessControl=1"
EndSection

Save and reboot.
related:

No screen brightness slider on Ubuntu 22.04

1 Answers1