How to Enable Automatic Brightness in Ubuntu Linux
Automatic brightness in Ubuntu Linux adjusts your screen’s brightness based on the surrounding light.
This feature, known as adaptive brightness, uses your computer’s light sensor to find the right screen brightness for you. It helps reduce eye strain and saves battery power.
Ubuntu Linux can automatically change your screen brightness for better viewing. Laptops running Ubuntu 22.04 LTS and later versions can dim the screen in dark rooms and make it brighter in sunlight without you touching a button.
Open System Settings, click on the Power tile, and then toggle the Automatic Screen Brightness switch to the On position. This feature uses your device’s light sensor to adjust screen brightness automatically.
How to enable or disable automatic brightness in Ubuntu Linux
You can turn automatic brightness on or off in Ubuntu Linux to make your screen adjust its brightness based on the light around you. This feature, called adaptive brightness, helps you see your screen better in different lighting. Managing automatic brightness in Ubuntu is done through the System Settings.
Let’s walk through how to enable or disable adaptive brightness in Ubuntu Linux.
Most of Ubuntu’s settings live in one place: the System Settings panel. You can manage everything from system configurations to user accounts and updates there.
To open System Settings, head to the Activities overview and type ‘Settings‘.

Alternatively, look for the System menu in the top-right corner of your desktop.
On the System menu, select Settings, as shown below.

In the Settings app, click on the Power tile to expand it.
The Automatic Screen Brightness setting, found within the Power Saving section of your Ubuntu Linux system, must be switched to the "On" position to activate automatic brightness adjustments. This feature helps conserve battery life by dimming your screen when it's not needed.

That’s it! You can now close the settings app.
Conclusion:
- Ubuntu Linux’s adaptive brightness feature adjusts the screen’s brightness based on surrounding lighting conditions, providing optimal brightness and contrast levels while saving power and prolonging battery life.
- Enabling automatic brightness ensures the screen is always easy to see in different ambient light conditions and helps reduce battery consumption.
- To enable or disable automatic brightness in Ubuntu Linux, access the System Settings panel, navigate to the Power section, and toggle the Automatic Screen Brightness switch to the desired position.
With this guide, you can manage Ubuntu Linux’s adaptive and automatic brightness settings for a better experience and energy savings.
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About the Author
Richard
Tech Writer, IT Professional
Richard, a writer for Geek Rewind, is a tech enthusiast who loves breaking down complex IT topics into simple, easy-to-understand ideas. With years of hands-on experience in system administration and enterprise IT operations, he’s developed a knack for offering practical tips and solutions. Richard aims to make technology more accessible and actionable. He's deeply committed to the Geek Rewind community, always ready to answer questions and engage in discussions.
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[…] Ubuntu Linux automatically adjusts screen brightness for some laptops or computers based on the current lighting conditions. This automatic setting helps make sure your screen is readable wherever you go. […]