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Alcasa

Member

Registered: 2013-05-18

Posts: 46

[Thinkpad W520] Cant control backlight with xbacklight [solved]

Hello Forum,

the backlight control keys wont work in gnome shell and xbacklight also doesnt work (it does not show errors).

Using

light

from aur works and when showing controllers. Both nv_backlight and intel_backlight are shown. I suspect a problem with the gpu setup using nouveau and intel.

Are there any ways to disable nv_backlight?

Or can I specify which controller to use for gnome shell?

Last edited by Alcasa (2015-04-26 17:22:13)

Head_on_a_Stick

Member

From: The Wirral

Registered: 2014-02-20

Posts: 9,003

Website

Re: [Thinkpad W520] Cant control backlight with xbacklight [solved]

Are there any ways to disable nv_backlight?

# systemctl mask systemd-backlight@backlight:nv_backlight.service

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Jin, Jîyan, Azadî

Alcasa

Member

Registered: 2013-05-18

Posts: 46

Re: [Thinkpad W520] Cant control backlight with xbacklight [solved]

Thanks for the answer.

I have solved the problem in the meantime adding the kernel option.

 video.use_native_backlight=0 

This option has been introduced to improve brightness configuration, albeit it doesnt work on W520.