How to Fix Brightness Control in Ubuntu

1 min

Ubuntu has a problem with laptop display brightness. You may have already faced where the laptop brightness is very high after installation and even if using the brightness control keys, it never gets down.

Well, we have a fix for that. Follow below steps:

  • Open the file /etc/default/grub using gedit or any other text editor.
  • Find below line.

  • Change above line to
  • GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor"

    grub update for brightness control
    grub update for brightness control
  • Save the file and close text editor.
  • Open terminal and run below command.
  • update-grub

  • Reboot.

That’s it. You can control your brightness now.

Let know whether it works using comment section below.

If you are looking for GUI based application in Ubuntu for brightness control click here.

We bring the latest tech, software news and stuff that matters. Stay in touch via Telegram, Twitter, YouTube, and Facebook and never miss an update!

Join our Telegram channel and stay informed on the move.

Subscribe to Blog via Email

Enter your email address to subscribe to this blog and receive notifications of new posts by email.


Creator of All time Linux user and open-source supporter. Connect with me via Telegram, Twitter, LinkedIn, or send us an email.
Notify of

This site uses Akismet to reduce spam. Learn how your comment data is processed.

Oldest Most Voted
Inline Feedbacks
View all comments
Would love your thoughts, please comment.x