Arch Linux

jothearcher

Member

Registered: 2023-01-17

Posts: 7

[SOLVED] Brightness control buttons not working in my Lenovo laptop.

I Bought a new laptop, Lenovo IdeaPad 3 15ITL6 82H802TRSB.
After installation of Arch Linux, I checked for the functioning of keys using xev, acpid_listen, showkeys, evtest etc... None of them produced any output for the brightness button (F5 and F6) but when pressed along with fn button they do show keycodes for both fn+F5 and fn+F6.
I tried adding kernel parameters such as acpi_backlight=vendor, acpi_backlight=intel_backlight, acpi_osi=, acpi_osi=linux, acpi_osi=windows etc... in GRUB but it didn't work.
Note: These buttons works fine in windows but not in linux.
Any help will be much appreciated thanks.

Last edited by jothearcher (2023-01-28 10:17:49)

thurstylark

Member

Registered: 2016-06-02

Posts: 11

Re: [SOLVED] Brightness control buttons not working in my Lenovo laptop.

This is usually configured in your DE/WM. What are you using?

HalosGhost

Forum Fellow

From: Twin Cities, MN

Registered: 2012-06-22

Posts: 2,097

Website

Re: [SOLVED] Brightness control buttons not working in my Lenovo laptop.

Worth mentioning that for the brightness keys to work automagically, that tends to be a firmware function. If that's not working under the kernel for any reason, then it's often sensible to configure a backlight brightness manager to operate on the keys you expect via your WM/DE configuration as thurstylark mentioned.

Disclaimer: I wrote a backlight manager.

All the best,

-HG

---

Code of Conduct

jothearcher

Member

Registered: 2023-01-17

Posts: 7

Re: [SOLVED] Brightness control buttons not working in my Lenovo laptop.

This is usually configured in your DE/WM. What are you using?

I tried in deepin DE it didn't work. Also checked it with other distros in live USB but no luck currently in Arch Linux and dwm setup and no luck.

jothearcher

Member

Registered: 2023-01-17

Posts: 7

Re: [SOLVED] Brightness control buttons not working in my Lenovo laptop.

Worth mentioning that for the brightness keys to work automagically, that tends to be a firmware function. If that's not working under the kernel for any reason, then it's often sensible to configure a backlight brightness manager to operate on the keys you expect via your WM/DE configuration as thurstylark mentioned.

Disclaimer: I wrote a backlight manager.

All the best,

-HG

As I mentioned there are no outputs (keycodes) for f5 and F6 keys from xev or evtest or showkeys or acpi_listen tools, so how could I configure those keys to control brightness?

PS:those work fine in windows.

Last edited by jothearcher (2023-01-27 08:49:55)

V1del

Forum Moderator

Registered: 2012-10-16

Posts: 25,142

Re: [SOLVED] Brightness control buttons not working in my Lenovo laptop.

Yes you'll either need to define something of your own that does get registered on the OS, or hope for a UEFI/BIOS update to fix them or so

jothearcher

Member

Registered: 2023-01-17

Posts: 7

Re: [SOLVED] Brightness control buttons not working in my Lenovo laptop.

Yes you'll either need to define something of your own that does get registered on the OS, or hope for a UEFI/BIOS update to fix them or so

Why do you think it is a bios/uefi issue?

V1del

Forum Moderator

Registered: 2012-10-16

Posts: 25,142

Re: [SOLVED] Brightness control buttons not working in my Lenovo laptop.

It's what's intercepting and controlling the buttons. sometimes updates here will make things more standardized. FWIW you do have a working brightness file you can echo into right? You are just wondering about the buttons themselves?

jothearcher

Member

Registered: 2023-01-17

Posts: 7

Re: [SOLVED] Brightness control buttons not working in my Lenovo laptop.

It's what's intercepting and controlling the buttons. sometimes updates here will make things more standardized. FWIW you do have a working brightness file you can echo into right? You are just wondering about the buttons themselves?

Yes I have a working brightness file that I can echo.
I am asking how is it a uefi/bios issue, because it works perfectly in windows, so it should be a issue in linux kernel side right?
I have found a similar one in kernel bugzilla for IdeaPad 5 15itl05 which is a different laptop from mine I guess.

Last edited by jothearcher (2023-01-28 06:51:07)

jothearcher

Member

Registered: 2023-01-17

Posts: 7

Re: [SOLVED] Brightness control buttons not working in my Lenovo laptop.

WDYM by this

Yes you'll either need to define something of your own that does get registered on the OS,

I am sorry if this is something simple, please direct me to somewhere to learn about it.

seth

Member

From: Won't reply 2 private help req

Registered: 2012-09-03

Posts: 75,085

Re: [SOLVED] Brightness control buttons not working in my Lenovo laptop.

I have found a similar one in kernel bugzilla for IdeaPad 5 15itl05 which is a different laptop from mine I guess.

Maybe, but the issue discussed there is relatively broad:
https://bugzilla.kernel.org/show_bug.cgi?id=214899#c35
And the proposed patches also help w/ various Yogas, so testing 6.2 itr is certainly worthwile.

Sidebar:

it works perfectly in windows

3rd link below, mandatory. Reboot windows and linux twice afterwards (for voodoo reasons)

---

How to upload text · How to boot w/o GUI · Disable Windows Fast-Start! · Fix your xinitrc

jothearcher

Member

Registered: 2023-01-17

Posts: 7

Re: [SOLVED] Brightness control buttons not working in my Lenovo laptop.

Maybe, but the issue discussed there is relatively broad:
https://bugzilla.kernel.org/show_bug.cgi?id=214899#c35
And the proposed patches also help w/ various Yogas, so testing 6.2 itr is certainly worthwile.

I tried it. Installing linux-mainline kernel along with linux-mainline-headers solved the issue.
So basically stable 6.2 will fix the issue it seems.

Sidebar:

it works perfectly in windows

3rd link below, mandatory. Reboot windows and linux twice afterwards (for voodoo reasons)

Thanks you for this. ☺️

Last edited by jothearcher (2023-01-28 10:17:14)

CabbageSpirits

Member

Registered: 2025-11-23

Posts: 1

Re: [SOLVED] Brightness control buttons not working in my Lenovo laptop.

brightnessctl is the function that the key presses should execute. If you don't have the package, it just won't function. Installing that should make it just work. Solved the issue with my T14.

V1del

Forum Moderator

Registered: 2012-10-16

Posts: 25,142

Re: [SOLVED] Brightness control buttons not working in my Lenovo laptop.

Note that the thread is solved and over 2 years old and the underlying issue was a kernel bug that got fixed. brightnessctl is not "the function that the key presses execute". They might be if your specific setup is set up that way, but that strongly depends on your general environment.

Closing this old thread.