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AhvW

Member

Registered: 2025-04-04

Posts: 2  

nv_backlight missing from /sys/class/backlight/

I'm a little unsure as to what I need to install to get

nv_backlight

to show up. I have downloaded both

libdrm-nouveau2

and

xserver-xorg-video-nouveau

but there's still nothing there. Do I need anything else? I've tried

acpi_backlight=vendor

and

acpi_backlight=video

in GRUB_CMDLINE_LINUX as well, to no avail. By the way I should tell you that it's a laptop with a NVIDIA GeForce 8600M GT GPU, using nouveau as getting the 340xx drivers working turned out to be quite a pain and honestly impossible.

delgado

Member

Registered: 2022-07-14

Posts: 237  

Re: nv_backlight missing from /sys/class/backlight/

I'm feeling stupid to just post links ... .
The archlinux wiki is the 'unofficial linux docu': https://wiki.archlinux.org/title/Backlight
Or maybe one of these: https://bbs.archlinux.org/viewtopic.php?id=213461 , https://forums.linuxmint.com/viewtopic.php?t=158087

AhvW

Member

Registered: 2025-04-04

Posts: 2  

Re: nv_backlight missing from /sys/class/backlight/

Thanks for replying.

Okay! I suppose it wasn't showing up because I was using

nomodeset

to get the system to boot, however, if I remove it, I get stuck at

nouveau 0000:01:00.0 enabling device (0002 -> 0003)