How to use the registry to adjust the screen brightness in Win10

In this article, I will teach you how to use the registry to adjust screen brightness in Win10, it is worth noting that there are some desktops or all-in-one, their monitors have their own brightness control, so for the method given in this article, you need the right monitor and the right driver, if you use a CRT monitor , the method that is given in this article to adjust the brightness of the screen may not work.

Tip: If you encounter the inability to create new/new key/modifier key values during the operation, please click here to download Execti and run Regedit.exe with Execti.

First, open a command prompt, enter and run the following command:

powercfg/l

You will see the following GUID for the available power plan:

Remember that we just got the GUID (as the author here for 381b4222-f694-41f0-9685-ff5bb260df2e).

Open Registry Editor (REGEDIT) and come to the following directory:

\hkey_local_machine\system\currentcontrolset\control\power\user\powerschemes\ "Replace here with your GUID"

Like what:

\hkey_local_machine\system\currentcontrolset\control\power\user\powerschemes\ 381b4222-f694-41f0-9685-ff5bb260df2e

Create a new item under this directory (without creating a new entry if it exists) and name it:

7516b95f-f776-4464-8c53-06167f40cc99

Come to our newly created 7516B95F-F776-4464-8C53-06167F40CC99 item, create a new item under this key (without creating a new entry if it exists), and name the newly created item:

Aded5e82-b909-4619-9949-f5d71dac0bcb

At this point, we are in the following directory:

\hkey_local_machine\system\currentcontrolset\control\power\user\powerschemes\ "Replace here with your GUID" \ 7516b95f-f776-4464-8c53-06167f40cc99\ aded5e82-b909-4619-9949-f5d71dac0bcb\

Such as:

\hkey_local_machine\system\currentcontrolset\control\power\user\powerschemes\ 381b4222-f694-41f0-9685-ff5bb260df2e\7516b95f-f776-4464-8c53-06167f40cc99\ ADED5E82-B909-4619-9949-F5D71DAC0BCB \

Create a new two DWORD (32-bit) value in this directory (without creating a new one if it exists), named:

Acsettingindex

And

Dcsettingindex

The final directory structure is this:

To adjust the brightness of the screen when plugged in, double-click the DWORD (32-bit) value Acsettingindex, set the value base to 10, and change its value data to the percentage of brightness you want to adjust to, such as the author wants to adjust the brightness to 20%, enter 20, and then click OK.

To adjust the screen brightness in the case of a battery, double-click the DWORD (32-bit) value Dcsettingindex, set the value base to 10, change its value data to the percentage of brightness you want to adjust to, for example, if the author wants to adjust the brightness to 20%, enter 20, and then click OK.

Close Registry Editor When the adjustment is complete and restart to take effect.

OK, the above is the whole content of this tutorial, happy to play it ~

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How to use the registry to adjust the screen brightness in Win10