Most of the time after installing or uninstalling software, changing PC configurations, editing the registry or other settings, cause Brightness Control Key is Not Working problem in Windows 10 and Windows 11. Here, in this article, I will describe some of the most effective ways to fix brightness issues in ACER, LENOVO, DELL, ASUS, SONY, etc laptop.
Method 1: Fix using Advanced System Repair Tool
Most of the time the problem persists because of corrupted or damaged system files, changes in system configuration files, outdated drivers, misconfigured registry files, etc. You can use Advanced System Repair Tool to fix all these problems with just in a single click.
3 Steps to Fix this Error
Step 2. SCAN your Windows PC
Step 3. Click Fix button to Repair Error
Method 2: Update Windows 10 Display Driver
This may be the first choice when going to fix any Display related issues in Windows 10/11. Updating Windows 10 display driver is not a big issue when you use the Device Manager panel. Apply the following steps in order to check outdated drivers and update them.
Method 3: Maybe Driver is not installed
Most commonly this Brightness control not available problem happens due to the unavailability of a correspondence driver. Either you haven’t installed the correct driver, or your driver software is corrupted or damaged. In both cases, installing a fresh version of the driver may fix this error more easily.
Method 4: Enable Adaptive Brightness
Adaptive Brightness is a feature in Windows 10/11 that automatically adjusts the brightness according to your outer lighting condition.
You can enable or disable this feature using Intel Graphics Command Center.
You can also change these settings using the command prompt. If you are not getting an option anywhere in system settings to change adaptive brightness settings, then you can just do it using the command prompt.
powercfg -setdcvalueindex SCHEME_CURRENT 7516b95f-f776-4464-8c53-06167f40cc99 FBD9AA66-9553-4097-BA44-ED6E9D65EAB8 1
powercfg -setdcvalueindex SCHEME_CURRENT 7516b95f-f776-4464-8c53-06167f40cc99 FBD9AA66-9553-4097-BA44-ED6E9D65EAB8 0
powercfg -setacvalueindex SCHEME_CURRENT 7516b95f-f776-4464-8c53-06167f40cc99 FBD9AA66-9553-4097-BA44-ED6E9D65EAB8 1
powercfg -setacvalueindex SCHEME_CURRENT 7516b95f-f776-4464-8c53-06167f40cc99 FBD9AA66-9553-4097-BA44-ED6E9D65EAB8 0
powercfg -SetActive SCHEME_CURRENT
In this article, I have explained the 4 unique ways to fix brightness control not working in Windows 10/11. You can resolve this issue by either updating/installing the driver or changing some system graphics settings.