Adjust Screen Brightness in Windows 10

Brink · 30 Oct 2016

Tutorial updated to add: :)

Option Eight: To Adjust Screen Brightness in PowerShell

Ruu · 28 Dec 2016

1. Does nothing
2. No icon on notification area

Adjust Screen Brightness in Windows 10-screenshot_1.jpg

3. No icon on notification area
4. No brightness slider

Adjust Screen Brightness in Windows 10-screenshot_3.jpg

5. No options at all. When I click on "change display settings" it opens point 4 display settings

Adjust Screen Brightness in Windows 10-screenshot_4.jpg

6. No slider under power settings
7. And option under advanced power settings

Adjust Screen Brightness in Windows 10-screenshot_6.jpg

8. Not sure what it means, but brightness won't change anyway

Adjust Screen Brightness in Windows 10-screenshot_2.jpg

Brink · 28 Dec 2016

Hello Ruu, :)

Is this a PC, laptop, or tablet?

If PC, then the screen brightness setting won't be available.

Ruu · 28 Dec 2016

Brink said:

Hello Ruu, :)

Is this a PC, laptop, or tablet?

If PC, then the screen brightness setting won't be available.

Yes, it is PC.
But why? My screen is too dark

Brink · 28 Dec 2016

It's a setting only available on tablets and notebooks.

You should still be able to manually adjust the brightness level with the monitor's on screen settings though. Check your monitor's manual for more on how to do so. It'll usually be a button at the bottom of the monitor to press.

oneLess · 30 Dec 2016

I use this registry pathes

Code:

;
; power plan HIGH PERFORMANCE - set video dim to 65% for DC
;
reg_keyname   = "HKLM\SYSTEM\CurrentControlSet\Control\Power\User\PowerSchemes\8c5e7fda-e8bf-4a96-9a85-a6e23a8c635c\7516b95f-f776-4464-8c53-06167f40cc99\aded5e82-b909-4619-9949-f5d71dac0bcb"
reg_valuename  = "DCSettingIndex"
reg_type    = "REG_DWORD"
reg_value    = 65
;
; power plan HIGH PERFORMANCE - set video dim to 100% for AC
;
reg_keyname   = "HKLM\SYSTEM\CurrentControlSet\Control\Power\User\PowerSchemes\8c5e7fda-e8bf-4a96-9a85-a6e23a8c635c\7516b95f-f776-4464-8c53-06167f40cc99\aded5e82-b909-4619-9949-f5d71dac0bcb"
reg_valuename  = "ACSettingIndex"
reg_type    = "REG_DWORD"
reg_value    = 100
;

for laptops.
The values are for High Performance plan only
Works in 10 , 8.x , 7

c

Underthaker · 30 Mar 2021

Good guys, how can we get / know the brightness level of the screen? Windows registry? Help.

hdmi · 31 Oct 2021

Instead of running a command that flashes a slow-loading Powershell window, you can put this in a batchfile:

Code:

FOR /F "tokens=4" %%v IN ('powercfg GetActiveScheme') DO (SET a=%%v)
powercfg SetDcValueIndex %a% SUB_VIDEO VIDEONORMALLEVEL <Brightness Level>

Substitute <Brightness Level> in the above batch code with 0 to 100 brightness level percentage you want.
To make the command window invisible, you can put this in a .vbs file:

Code:

Dim wshShell
Set wshShell = CreateObject("WScript.Shell")
wshShell.Run """C:\tools\Adjust Screen Brightness.bat""", 0
Set wshShell = Nothing

Substitute C:\tools\Adjust Screen Brightness.bat in the VBScript above with the filepath of your batchfile.

- - - Updated - - -

Underthaker said:

Good guys, how can we get / know the brightness level of the screen? Windows registry? Help.

Batchfile:

Code:

@ECHO OFF
SETLOCAL EnableDelayedExpansion
FOR /F "tokens=4" %%v IN ('powercfg GetActiveScheme') DO (SET a=%%v)
SET "b=      GUID Alias: VIDEONORMALLEVEL"
SET LF=^


REM The two empty lines are required here
SET "output="
FOR /F "delims=" %%v IN ('powercfg q %a% SUB_VIDEO') DO (
   IF DEFINED output SET "output=!output!!LF!"
   SET "output=%%v"
   SET "output=!output:*DC Power Setting Index: =!
   IF !c! == 1 (IF NOT !output! == %%v GOTO endloop)
   IF !output! == !b! SET /a c=1
)
:endloop
SET /a r=!output!
ECHO The current screen brightness level is: %r%%%
PAUSE

EDIT: Please note, it should work on English versions of Windows 10/11. I only tested it on the Dutch version of Windows 11 Home, it works. On the German version of Windows you would need to modify the batch code so it matches the language translations for the powercfg command's output (whereas on the Dutch version of Windows it uses the English language instead

). Anyway, here is a slightly shorter version:

Code:

@ECHO OFF
SETLOCAL EnableDelayedExpansion
FOR /F "tokens=4" %%v IN ('powercfg GetActiveScheme') DO (SET a=%%v)
SET LF=^


REM The two empty lines are required here
SET "output="
FOR /F "delims=" %%v IN ('powercfg q %a% SUB_VIDEO VIDEONORMALLEVEL') DO (
   IF DEFINED output SET "output=!output!!LF!"
   SET "output=%%v"
   SET "output=!output:*DC Power Setting Index: =!
   IF NOT !output! == %%v GOTO endloop
)
:endloop
SET /a r=!output!
ECHO The current screen brightness level is: %r%%%
PAUSE

EDIT2: This is even shorter still, and it should work on any language of Windows:

Code:

@ECHO OFF
SETLOCAL EnableDelayedExpansion
FOR /F "tokens=4" %%v IN ('powercfg GetActiveScheme') DO (SET a=%%v)
SET LF=^


REM The two empty lines are required here
SET "output="
FOR /F "delims=" %%v IN ('powercfg q %a% SUB_VIDEO VIDEONORMALLEVEL') DO (
   IF DEFINED output SET "output=!output!!LF!"
   SET "output=%%v"
   SET "output=!output:*: =!
)
SET /a r=!output!
ECHO The current screen brightness level is: %r%%%
PAUSE

trashcanbin10 · 19 Nov 2021

Option Nine works for me thanks. Infuriating I have to look up for guide for a seemingly simple issue. Used to switch brightness around through right click Taskbar -> Setting -> Brightness now it's poof and gone on this new PC.

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