Hi Vesa
Thank you for your information.
Could you try the command below to fix the issue?
```
sudo apt update
sudo apt install linux-modules-nvidia-570-generic-hwe-24.04
sudo reboot
```
after reboot, please check if modules be loaded, and backlight nodes showup
```
lsmod | grep nvidia
ls /sys/class/backlight
```
BR
An
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https://bugs.launchpad.net/bugs/2155617
Title:
Backlight device disappears and brightness breaks on kernel 6.17.0-23+
(Lenovo Legion 5 Pro, NVIDIA hybrid graphics)
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