How to Turn Keyboard Backlight Autobrightness on or off in Windows 11
Keyboard backlight autobrightness in Windows 11 changes your keyboard lights on its own by using your laptop’s built-in light sensor to match the room lighting. This feature helps save battery power in bright rooms and keeps your keys easy to see in the dark, working just like the automatic brightness on your phone screen.
Most newer laptops with an ambient light sensor support this option. You can turn the feature on or off at any time through the Windows Settings app if you prefer to control your keyboard lights yourself.
Open Settings , navigate to Bluetooth & devices, then Keyboard, and toggle “Change keyboard brightness automatically when lighting changes” on or off. For advanced users, modify the EnableBucketedBacklightAutobrightness value in Registry Editor.
Why turn Keyboard Backlight Autobrightness on or off?
Turning keyboard backlight autobrightness on lets your keyboard light adjust itself automatically, which is handy if you often move between bright and dark rooms.
What happens when done?
Once you change this setting, your keyboard backlight will either automatically adjust its brightness based on the room’s light, or it will stay at the brightness level you set manually.
Option 1Use Windows Settings
You can turn keyboard backlight autobrightness on or off directly through Windows Settings by opening the main menu and locating the keyboard options. Press the Win plus I on your keyboard to open Settings , click Bluetooth & devices, and select Keyboard to find the autobrightness control and adjust it to match your preference.
- Open Settings. You can do this by pressing the Win+I on your keyboard.
- On the left side, click on Bluetooth & devices. Then, on the right side, click on Keyboard.
- Look for the Keyboard backlight section. You will see an option that says “Change keyboard brightness automatically when lighting changes”. Turn this setting On or Off, depending on what you want.
- You can now close the Settings window.
Option 2Use Registry Editor (Advanced Users)
Registry Editor (a tool that lets you change system settings) provides an advanced method to control keyboard backlight autobrightness when the standard menu options are missing. Type regedit into your taskbar search box and press Enter to open the editor, but proceed carefully because mistakes can cause system problems.
Users must exercise caution when using the Registry Editor, as incorrect changes can affect Windows 11 performance.
You can search for "regedit" in the Windows search bar and press Enter. You might need to click "Yes" on a User Account Control prompt.
To Turn On Keyboard Backlight Autobrightness
Enabling keyboard backlight autobrightness requires modifying a specific system key inside Registry Editor. Open Registry Editor, go to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Sensors\LightSensors\KeyboardBacklight, and change the relevant value to turn the automatic brightness feature back on.
In the Registry Editor, navigate to: `HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Brightness`
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\
You will need to create or modify a value named EnableBucketedBacklightAutobrightness.
Double-click on EnableBucketedBacklightAutobrightness. Make sure the "Value data" is set to 1. Click OK.
To Turn Off Keyboard Backlight Autobrightness
Disabling keyboard backlight autobrightness requires changing a specific registry entry value to zero. Open Registry Editor, navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Sensors\LightSensors\KeyboardBacklight, double-click the EnableBucketedBacklightAutobrightness entry, and change the value data to 0.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\ airson\Sensors\LightSensors\KeyboardBacklight
Double-click on EnableBucketedBacklightAutobrightness. Make sure the "Value data" is set to 0. Click OK.
After changing Windows 11 keyboard backlight settings, restarting the computer ensures the new brightness control takes full effect. This restart action applies the chosen automatic brightness adjustments, whether turning it on or off, to the keyboard's lighting.
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Summary
You've learned how to manage your keyboard's automatic brightness in Windows 11, with the straightforward Settings app for most users and the more advanced Registry Editor for those who need it.
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About the Author
Richard
Tech Writer, IT Professional
Richard is a writer at Geek Rewind who turns complex IT tasks into clear, step-by-step guides. He draws on years of hands-on experience in system administration and enterprise IT operations, focusing on Windows, Linux and WordPress: the problems people actually run into, and the fixes that work. His server and WordPress guides come from systems he runs himself. Richard builds and maintains the platform behind Geek Rewind, from its Ubuntu servers and Nginx configuration to its custom WordPress plugins. Many new tutorials start with readers' questions, and he's always glad to answer them in the comments.
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