Fix Brightness Problem In Ubuntu 22.04 LTS

Last Updated on August 6, 2023 by Prabha

Fix the Laptop Brightness Problem In Ubuntu 22.04 LTS

If you are having a problem with the brightness of your Laptop after installing Ubuntu 22.04 LTS then you are in the right place as we have a solution for it. There are multiple ways to fix the brightness problem in Ubuntu 22.04 LTS.

How To Fix Brightness Problem In Ubuntu 22.04 LTS

There are multiple ways to fix the brightness problem in Ubuntu 22.04 LTS.

Method 1:

In this very first method, we will take the help of software or app called “Brightness Controller“. Run the following command to add PPA and install the Brightness Controller in Ubuntu 22.04 LTS.

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

Method 2:
In this method, we will edit the Grub file to configure the setting and fix the brightness problem in Ubuntu 22.04 LTS. You need to open the file /etc/default/grub using gedit or any favorite editor of yours.

sudo gedit /etc/default/grub

After the file is open on editor, find the below line.

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"

Change the above line to:

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor"

You might be wondering about the changes made by this update. These changes will load device-specific drivers in Linux. Save the file and close the text editor and run the following command to update the grub and restart your Ubuntu. after reboot, try adjusting the brightness using Laptop’s dedicated control keys.

update-grub

Method 3:

In this method, run the following command to find out the name of your display using the below command.

xrandr | grep " connected" | cut -f1 -d " "

So, the next is to change the brightness using the display name.

xrandr --output system-display-name --brightness 0.7