[Resolved] Saturated color in low brightness

Which Linux distro are you using?
Ubuntu

Which release version?
24.04.1 LTS

Which kernel are you using?
6.8.0-51-generic

Which BIOS version are you using?
03.05 (03/29/2024)

Which Framework Laptop 13 model are you using ?
Framework Laptop 13 DIY Edition (AMD Ryzen™ 7040 Series) and 2.8k Display

Hello everyone,
I have a question that I haven’t found if a dedicated topic already exists.
When I put the screen in the lowest brightness, I see that it gradually changes the colors and saturates them (by a lot I find).

I’ve tried to film the phenomenon to no avail (it’s not easy to film a change in brightness and colors) and it’s rather something that can be felt with the naked eye.

The screen resolution is 2880x1920 120hz.
The color profile is i1Profiler named “BOE0CB4.icm”.

It’s not particularly disabling, but colors when watching a film are very saturated.

Is anyone else in the same situation?

1 Like

I had the same issue. It seems to be the Ambient Backlight Manager. You can disable it by adding this to the kernel line:

amdgpu.abmlevel=0

There also seems to be an option to change it in the power profiles daemon.

More info: Adaptive Backlight Management (ABM) - #24 by Mistral24

2 Likes

Wow, that’s exactly it!
Thanks a lot, I’ve just tested it and it works perfectly.
For those of you in the same situation:

  • Edit the file /etc/default/grub
  • On the line “GRUB_CMDLINE_LINUX” add “amdgpu.abmlevel=0”
  • Execute: “sudo update-grub”

Thanks again for the help

2 Likes

Ooooh, I bet this is what I’ve been experiencing at low brightness on ubuntu as well! I appreciate you making a post on the topic here. I was just planning on living with it. :sweat_smile:

1 Like

Thank you. This solved my problem too!

For anyone else that maybe needs just a little more hand-holding (and also, just double checking that I did it correctly :sweat_smile:) this is what it should look like.

I don’t know the syntax to adding multiple modifications to this line though, so if you’ve got anything else there already you’ve probably got more research to do.