Arch Linux

anakinsky

Member

Registered: 2026-10-13

Posts: 6

Please help..My lowest brightness is still high

When I set my brightness to minimum , it is still bright, it could go lower on windows, issue is eye strain otherwise I was ignoring it ,

DEVICE: /sys/class/backlight/amdgpu_bl1

brightness: 655

actual_brightness: 1848

max_brightness: 65535 (rn my brightness is at lowest )

❯ journalctl -b -k | grep -iE 'brightness curve|amdgpu.*backlight'

Oct 13 09:35:46 archlinux kernel: amdgpu 0000:03:00.0: [drm] Using custom brightness curve

I am using Arch Hyprland Hyde dotfiles.........pc specs Ryzen 5500u 16gb ram igpu i.e vega 7

seth

Member

From: Won't reply 2 private help req

Registered: 2012-09-03

Posts: 78,373

Re: Please help..My lowest brightness is still high

https://wiki.archlinux.org/title/Backli … urve_(AMD)

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gabrielsec

Member

From: Rio De Janeiro | Brazil

Registered: 2026-10-16

Posts: 18

Re: Please help..My lowest brightness is still high

I'd try disabling the custom brightness curve first. The ArchWiki — Backlight (AMD) documents the `amdgpu.dcdebugmask=0x40000` kernel parameter for this purpose.

Add the parameter to your kernel command line, reboot, and check whether the minimum brightness gets lower. If it doesn't help, I'd check the kernel version next.

Regards, 
Gabriel

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