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Bersam

Member

From: Nowhere

Registered: 2010-10-03

Posts: 32

Website

[SOLVED] brightness control doesn't work anymore [Lenovo G580]

Hi everybody,

Seems after last update to "Linux GNU 3.16.1-1-ARCH" x86_64, brightness keys doesn't work anymore. but volume keys work just fine.

Got anybody any idea what is the problem?

Using updated Archlinux with i3wm.

[Update]

I can change brightness with this command:

sudo tee /sys/class/backlight/intel_backlight/brightness <<< 800

but brightness keys doesn't work anymore.

[UPDATE-2]

Thanks to teateawhy, adding "video.use_native_backlight=0" to kernel parameter solved my problem; just do not forget to run

 sudo grub-mkconfig -o /boot/grub/grub.cfg

after adding that param to kernel parameters.

Last edited by Bersam (2014-09-10 08:51:22)

Head_on_a_Stick

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From: The Wirral

Registered: 2014-02-20

Posts: 8,824

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Re: [SOLVED] brightness control doesn't work anymore [Lenovo G580]

Hardware specs?
I lost the use of my XF86 brightness keys with kernel 3.16, but gained recognition of the display in the xbacklight program: I use that now.
(Intel HD4600)

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Jin, Jîyan, Azadî

Bersam

Member

From: Nowhere

Registered: 2010-10-03

Posts: 32

Website

Re: [SOLVED] brightness control doesn't work anymore [Lenovo G580]

Hardware specs?
I lost the use of my XF86 brightness keys with kernel 3.16, but gained recognition of the display in the xbacklight program: I use that now.
(Intel HD4600)

I have Intel HD 4000 (loaded with i915 kernel driver) (Lenovo G580)

Head_on_a_Stick

Member

From: The Wirral

Registered: 2014-02-20

Posts: 8,824

Website

Re: [SOLVED] brightness control doesn't work anymore [Lenovo G580]

Yeah, try using the xbacklight program & bind some keys for it.
EDIT: you could try messing around with your kernel parameters, I didn't bother.

Last edited by Head_on_a_Stick (2014-08-25 11:58:29)

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Jin, Jîyan, Azadî

teateawhy

Member

From: GER

Registered: 2012-03-05

Posts: 1,138

Website

Re: [SOLVED] brightness control doesn't work anymore [Lenovo G580]

On my thinkpad adding this kernel parameter helped:

video.use_native_backlight=0

Also see this thread:
https://bbs.archlinux.org/viewtopic.php?id=184949