How to set brightness on Lenovo Legion 5

[Moricef]

Hello, I am running FreeBSD 14.0 on a Lenovo Legion 5 17 CH6H with i3wm. The function keys for regulating brightness, Fn+F5 and Fn+F6 modify hw.acpi.video.lcd0.brightness 2 to 100, but in reality the brightness of the screen remains unchanged, and stay at maximum brightness. I tried backlight and xandr without result. Backlight doesn't create /dev/backlight.

 

[csbatista]

Hello,
install the drm-kmod package and load with kldload i915kms. In my legion works with FreeBSD current, specs:

pciconf -lv | grep -B3 VGA
vendor = 'Intel Corporation'
device = 'Raptor Lake-P [UHD Graphics]'
class = display
subclass = VGA
--
vendor = 'NVIDIA Corporation'
device = 'GN20-P0-R-K2 [GeForce RTX 3050 6GB Laptop GPU]'
class = display
subclass = VGA

But nvidia not working... only intel graphics.

 

[CeXP1917]

Lenovo got IBM notebook business, so take a look at acpi_ibm kernel module.