weird auto brightness issue on asus tuf a16 (hyprland)

WebPukkie · 2026-05-19 18:29:57

For some reason on windows and on linux my laptop has issue with auto brightness. When something bright on screen appears the screen becomes brighter, if something dark and the whole screen becomes darker. On windows armory crate and new drivers fixed that issue but here i can't do anything about it.... I added 1 line to grub just to make a laptop brighter because without them brightness control doesn't work at all and screen is dark the whole time but that's all what i could change.

GRUB_CMDLINE_LINUX_DEFAULT="loglevel=3 quiet acpi_backlight=video nvidia.NVreg_EnableBacklightHandler=0"

I want to get rid of this auto brightness if you haven't understood yet

BIGBEASTISHANK · 2026-05-20 06:35:18

See auto brightness is not directly controlled by hyperland it's controlled by some form of tool wlsunset, gammastep, brightnessctl scripts, or hypridle.

Try disabling ambient light sensor (As you said you want to get rid of auto brightness), for now remove your grub command and do this insted

$ ls /sys/bus/iio/devices/

If you see devices like iio:device0 auto brightness may be active. To disable it run this

# bash -c 'echo 0 > /sys/bus/iio/devices/iio:device0/buffer/enable'

this will temporarily disable ambient light sensor, see if this works or not.

Last edited by BIGBEASTISHANK (2026-05-20 09:16:07)

seth · 2026-05-20 07:20:21

When something bright on screen appears the screen becomes brighter, if something dark and the whole screen becomes darker.

Sounds like https://en.wikipedia.org/wiki/Contrast_ … c_contrast which would be controlled by the firmware

nvidia.NVreg_EnableBacklightHandler=0

Does the device even have an nvidia GPU?

According to https://www.reddit.com/r/Asustuf/commen … t/mxvyg26/ using the "vendor" backlight acpi and enforcing linux as OSI hint would help
Also see https://wiki.archlinux.org/title/Asusctl

I guess your UEFI settings have no option for this?

BIGBEASTISHANK · 2026-05-20 07:37:55

seth wrote:

Does the device even have an nvidia GPU?

Yes a16 has nvidia

And yes its controlled by firmware, and he can just disable the sensor completly to get rid of it

seth wrote:

Also see https://wiki.archlinux.org/title/Asusctl

Isn't it for keyboard and not for screen (just asking)? Aura is for peripheral and keyboard.

---

Side note: hey bud

WebPukkie · 2026-05-20 08:59:14

BIGBEASTISHANK wrote:

See auto brightness is not directly controlled by hyperland it's controlled by some form of tool wlsunset, gammastep, brightnessctl scripts, or hypridle.
Try disabling ambient light sensor (As you said you want to get rid of auto brightness), for now remove your grub command and do this insted
ls /sys/bus/iio/devices/
If you see devices like iio:device0 auto brightness may be active. To disable it run this
sudo bash -c 'echo 0 > /sys/bus/iio/devices/iio:device0/buffer/enable'
this will temporarily disable ambient light sensor, see if this works or not.

[alex@UwUnix ~]$ ls /sys/bus/iio/devices/
ls: cannot access '/sys/bus/iio/devices/': No such file or directory
[alex@UwUnix ~]$

It returns with nothing

WebPukkie · 2026-05-20 09:00:10

BIGBEASTISHANK wrote:

seth wrote:
Does the device even have an nvidia GPU?
Yes a16 has nvidia
And yes its controlled by firmware, and he can just disable the sensor completly to get rid of it

seth wrote:
Also see https://wiki.archlinux.org/title/Asusctl
Isn't it for keyboard and not for screen (just asking)? Aura is for peripheral and keyboard.
---
Side note: hey bud

yes it's only for keyboard and installing this somehow managed to break my lights on keyboard too lol

WebPukkie · 2026-05-20 09:01:22

seth wrote:

When something bright on screen appears the screen becomes brighter, if something dark and the whole screen becomes darker.
Sounds like https://en.wikipedia.org/wiki/Contrast_ … c_contrast which would be controlled by the firmware
nvidia.NVreg_EnableBacklightHandler=0
Does the device even have an nvidia GPU?
According to https://www.reddit.com/r/Asustuf/commen … t/mxvyg26/ using the "vendor" backlight acpi and enforcing linux as OSI hint would help
Also see https://wiki.archlinux.org/title/Asusctl
I guess your UEFI settings have no option for this?

yes i have rtx 5060, i had similiar issues with lenovo loq rtx 5050 so i think it might be a rtx 50s problem

BIGBEASTISHANK · 2026-05-20 09:08:50

Hey don't bump everytime, just exit previous message and use "quote" to reply to specific line
Forum rule: https://bbs.archlinux.org/viewtopic.php?id=130309
Quote help: https://bbs.archlinux.org/viewtopic.php?id=6791

WebPukkie wrote:

[alex@UwUnix ~]$ ls /sys/bus/iio/devices/
ls: cannot access '/sys/bus/iio/devices/': No such file or directory
[alex@UwUnix ~]$

See on how to upload texts https://wiki.archlinux.org/title/List_o … ted_client for long texts, and for small use "code" block https://bbs.archlinux.org/viewtopic.php?id=166017

WebPukkie wrote:

yes it's only for keyboard and installing this somehow managed to break my lights on keyboard too lol

Uninstall it if it create issue with your system

WebPukkie wrote:

yes i have rtx 5060, i had similiar issues with lenovo loq rtx 5050 so i think it might be a rtx 50s problem

Not really I have msi crosshair 16hx ai d2xwfkg with rtx 5060 max-q no issue on my side

WebPukkie wrote:

It returns with nothing

Can you give the output for

$ ls /sys/class/backlight/

Last edited by BIGBEASTISHANK (2026-05-20 09:15:46)

seth · 2026-05-20 09:22:19

asusctl supports a whole set of asus"-specific features.
To rephrase: do you *only* have a Nvidia GPU (ie does that drive the panel)?

Afaiu your OP, this is *not* about ambient light detection (backlight changes with the sun) but dynamic contrast (backlight changes with the content), in doubt please clarify that

BIGBEASTISHANK · 2026-05-20 09:36:28

seth wrote:

Afaiu your OP, this is *not* about ambient light detection (backlight changes with the sun) but dynamic contrast (backlight changes with the content), in doubt please clarify that

Yaa true but @WebPukkie can you confirm one thing, that the issue is consistant or it happnes randomly or only in dark room or only in bright room, because if it's room specific then it could be ambient light issue (happned to my friend thats why i suspected it then he have to get it fixed).

seth · 2026-05-20 13:10:51

In a very dark environment the screen content could impact the ambient light, but the symptom explanation would then likely been have less specific.

@WebPukkie, check whether nvidia-settings offers anything reg. dynamic contrast control.
If not, test the behavior on X11 and check nvidia-settings there, too.

The kernel parameter you're attempting is likely dead, https://forums.developer.nvidia.com/t/n … ved/176213

Arch Linux

#1 2026-05-19 18:29:57

weird auto brightness issue on asus tuf a16 (hyprland)

#2 2026-05-20 06:35:18

Re: weird auto brightness issue on asus tuf a16 (hyprland)

#3 2026-05-20 07:20:21

Re: weird auto brightness issue on asus tuf a16 (hyprland)

#4 2026-05-20 07:37:55

Re: weird auto brightness issue on asus tuf a16 (hyprland)

#5 2026-05-20 08:59:14

Re: weird auto brightness issue on asus tuf a16 (hyprland)

#6 2026-05-20 09:00:10

Re: weird auto brightness issue on asus tuf a16 (hyprland)

#7 2026-05-20 09:01:22

Re: weird auto brightness issue on asus tuf a16 (hyprland)

#8 2026-05-20 09:08:50

Re: weird auto brightness issue on asus tuf a16 (hyprland)

#9 2026-05-20 09:22:19

Re: weird auto brightness issue on asus tuf a16 (hyprland)

#10 2026-05-20 09:36:28

Re: weird auto brightness issue on asus tuf a16 (hyprland)

#11 2026-05-20 13:10:51

Re: weird auto brightness issue on asus tuf a16 (hyprland)

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