No brightness display

[gaabegg]

Hi! Can someone help me??

So, i recently installed the latest version of Zorin Os and i'm stuck on a common problem: the brightness issue

my PC is a notebook AN515-47, AMD Ryzen 7 and NVIDIA GEFORCE RTX 3050

I searched here and on Reddit of a solution and:

1. tried the "sudo nano /etc/default/grub" -> didn't work
2. tried the xrandr and it worked -> but deactivate the night light/ night mode
3. xdotool didn't work -> like it doesn't exist the "brightness" to bind the keys
4. i have the "Fn" key for brightness control and the screen brightness is controlled on left/right arrows (and doesn't work) {F9 and F10 is for the keyboard [it works just fine]}
5. xgamma is not what im looking for
6. brightnessctl is too complicated
7. xbacklight doesn't work
8. redshift i didn't use it since is more like what night mode is doing
9. i updated all my drivers (at least i think i've done everything right) -> nothing changed
10. the brightness slider doen't exist on the fast menu and on main configuration (is not on enegy part and in nowhere to be found lol)

i'm a newbie in linux (used here and there) and i don't know how to fix this issue since, apparently is a software and hardware problem so i don't know what's happening nor how to fix it. I previously had win11 (change it cause i was costing my ssd) and everything was working fine

Does anyone has a solution to this? if not, can someone recommend me a good extention (or something similar)? i appreciate for those who answer!!

Edit: xrandr stopped working lol, it won't do anynthing with the display light now, just, in fact, the brightness of the interface

[Aravisian]

We need to know what session you are using.
Can you please relay the output of terminal output of:

echo $XDG_SESSION_TYPE

Zorin OS defaults to Wayland. Wayland doees not work with x-controls at all, like Xdotool or Xrandr. It also does not mix well with Nvidia...
And you have Hybrid Graphics, on top of that.

@gaabegg

tried the "sudo nano /etc/default/grub" -> didn't work

What parameter did you use in the grub file?

[Forpli]

Did you try this solution mentioned here?

Acer Nitro 5 brightness problem in 22.04.2 LTS

"Adding just acpi_backlight=native worked for me.

grub line becomes:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=native"

Ubuntu 24.04
Acer Nitro 5 AN515-47

Following steps from Pratham:

1. sudo nano /etc/default/grub
2. Replace GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" With GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=native"
3. press ctrl+o, then enter to confirm, then ctrl+x to quit nano
4. sudo update-grub
5. reboot your system

"
(I changed gedit to nano and adapted it so that you can use the commands on Zorin)

That's the part of the original file which you need to edit (it may look a bit different on your system, I use the Zorin live boot stick at the moment)

Only change the one line there which begins with GRUB_CMDLINE_LINUX_DEFAULT, so that it looks so: