Can't change brightness on version 22.04

Question

I'm new to Linux, so I use Linux on dualboot. At the first time of installing Ubuntu, the brightness slider was working fine but when I made some updates + installed an Nvidia driver the slider is not doing anything anymore. Tried adding GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor to /etc/default/grub but didn't work. Tried to install Brightness Control as a temporary solution but even that wasn't working. The /sys/class/backlight folder has two folder in it; amdgpu_bl0 and ideapad, brightness slider only effect the files included in ideapad folder. What should I do? System specs: Ryzen 5 4600H GTX 1650 Ti

I have a similar issue. From what I read, you may try to revert Nvidia driver to version 470 if you are using 510. Personally I cannot afford it because 470 is not working properly when 2 external monitors are plugged. — duburcqa, May 08 '22 at 21:05
Reverting to old drivers and / or reverting xorg drivers didn't work for me. You may try the answer i posted but if you are not using an iGPU that might not solve you are problem. — Reimner, May 09 '22 at 22:37

Chris Z · Answer 1 · 2022-06-11T03:25:55.203

6

I had the same issue and the same fix as the accepted answer, but I just wanted to clarify the steps because it was confusing when I tried to follow them.

1). Open /etc/default/grub in a text editor with sudo permissions for example sudoedit /etc/default/grub

2). Add amdgpu.backlight=0 to the line GRUB_CMDLINE_LINUX="..."

2). Run sudo update-grub

3). Reboot

edited Jun 11 '22 at 03:25

answered Jun 11 '22 at 03:12

Chris Z

331

score 5 · Accepted Answer · answered May 09 '22 at 22:33

5

Thanks to this post, I am able to change the screen brightness. Go to /etc/grub and find GRUB_CMDLINE_LINUX= and add amdgpu.backlight=0 to there. Solved my issue in Fedora and Kubuntu both so the problem is the Radeon Graphics iGPU I guess.

answered May 09 '22 at 22:33

Reimner

231
1
2
9

1

thank for the advice, sadly I have an intel CPU so it is not going to help for me. Glad you found a solution to your problem! – duburcqa May 10 '22 at 05:19
Thanks, i hope you can find a solution cuz this thing kills peoples eyes. Good luck! – Reimner May 11 '22 at 16:29
milembar, I also have intel CPU and graphics, have you found any other way? the most weird thing is slider is working but buttons are not working – Kiran Mali Aug 24 '22 at 06:18
Hm, really strange. Stops working, if I add parameter amd_pstate=passive too – Yura Shinkarev May 31 '24 at 16:38

score 3 · Answer 3 · answered Aug 30 '23 at 22:35

3

In my case:

Operating System: Ubuntu 22.04.3 LTS
          Kernel: Linux 6.2.0-31-generic
    Architecture: x86-64
 Hardware Vendor: ASUSTeK COMPUTER INC.
  Hardware Model: Vivobook_ASUSLaptop M7600QC_M7600QC

nvidia/525.125.06
dkms-2.8.7

On the contrary, I've removed the command acpi_backlight=vendor from GRUB_CMDLINE_LINUX_DEFAULT and it helps.

answered Aug 30 '23 at 22:35

Alexey Khaylov

131

Not in Ubuntu, but removing àcpi_backlight=vendorfrom the kernel parameters solved the issue for me as well. Incidentally also with anideapad. I noticed after that change and a reboot, that /sys/class/backlight/ideapadwas changed to/sys/class/backlight/intel_backlight`. That is, the former directory no longer exists. – miyalys Mar 29 '24 at 00:30
1

Got an HP Elitebook with Intel CPU and AMD GPU. This worked out of the box (only you have to remember to run sudo update-grub after editing your grub file XD) – TheEagle Oct 08 '24 at 11:15

Vinod Singh · Answer 4 · 2024-10-13T16:53:00.517

1

https://github.com/F-i-f/soft-brightness seems to be the only solution that works for (AM)OLED screens running on Wayland with Intel processor.

After installing soft-brightness, brightness gets adjusted via both Ubuntu control and keyboard.

UPDATE 2024

soft-brightness package is not maintained and does not work for newer version of Gnome. https://extensions.gnome.org/extension/5943/soft-brightness-plus/ is a fork of that project it works on Ubuntu 24.04.

edited Oct 13 '24 at 16:53

answered Oct 14 '22 at 04:31

Vinod Singh

11

+1 This is the only solution that worked for me. Thanks! – apsad Dec 02 '23 at 06:15

score 1 · Answer 5 · edited Dec 21 '22 at 09:26

1

Tried the solutions above, but none of them working on my Nvidia GPU/intel core i.7 CPU, Ubuntu 22.04 machine with wayland. After updating the module nvidia-dkms the brightness control worked again:

sudo apt install nvidia-dkms-525

edited Dec 21 '22 at 09:26

Gabriel Staples

11,722

answered Dec 19 '22 at 18:33

Jens

11

Few months ago the following helped me GRUB_CMDLINE_LINUX_DEFAULT="acpi_backlight=vendor". However, last week it stopped working. Installing nvidia-dkms-525 package helped! – Daniel Andrzejewski Mar 01 '23 at 14:57
How did you know that nvidia-dkms-525 was the correct package? – Stewart Nov 26 '23 at 21:08

score 1 · Answer 6 · answered Aug 02 '23 at 04:29

Hope I'll still be in help. The best solution is to install a gnome shell extension called "Soft Brightness Plus", which allow you to change the screen brightness with both you keyboards and the slider.

sudo apt update
sudo apt install gnome-shell-extensions

Then you may go into the browse tab, find the extension and install it. Then return to the "Installed" tab, select the gear icon on the extension and turn on "Use backlight control" Extension github page: https://github.com/jkitching/soft-brightness-plus.git

score 0 · Answer 7 · answered Aug 17 '22 at 08:23

0

I deleted the nvidia drivers. Then I installed the nvidia drivers. Then, hey presto, the sliders in brightness-control started working again.

answered Aug 17 '22 at 08:23

Stephen Matthias

1

Pedro Dias · Answer 8 · 2022-10-02T21:20:24.253

0

Just wanted to share that I tried a plethora of methods related to the grub configurations without any success, but I managed to solve this issue by simply updating the linux kernel. I had linux 22.04 LTS kernel 5.15 and updated it to 5.19.11-051911-generic.

My machine had 2 directories under /sys/class/backlight: amdgpu_bl0 and nvidia_0 and I was able to manually change the brightness value in the /sys/class/backlight/amdgpu_bl0/brightness with sudo. At first I thought it was because of the NVIDIA drivers but after uninstalling them the problem persisted. After the kernel update I no longer had the nvidia_0 folder in the /sys/class/backlight.

edited Oct 02 '22 at 21:20

answered Oct 01 '22 at 23:09

Pedro Dias

1

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While this link may answer the question, it is better to include the essential parts of the answer here and provide the link for reference. Link-only answers can become invalid if the linked page changes. - From Review – Pilot6 Oct 02 '22 at 10:36
Is there any link to how to update the linux kernel at all, please? – Stewart Nov 26 '23 at 21:07
This actually works for me. Even though the Fn + Increase/Decrease Brightness on keyboard are still not working, I'm able to change the display brightness (laptop) by adjust these values. For me it's this path: sys/class/backlight/intel_backlight/brightness – Andiana Jan 09 '24 at 16:45

Ayush · Answer 9 · 2024-11-17T07:55:48.863

I installed an application called brightness-controller following the steps mentioned in the articel and it worked on Ubuntu 24.04.1 LTS: https://www.geeksforgeeks.org/how-to-control-screen-brightness-in-ubuntu-22-04/

Commands:

sudo apt update
sudo add-apt-repository ppa:apandada1/brightness-controller
sudo apt update
sudo apt install brightness-controller

Launch the application
brightness-controller

Can't change brightness on version 22.04

9 Answers9

Launch the application