WARNING: Don’t do this unless you know what you are doing. Messing with the registry can break your computer!
NOTE: This is not related to Windows automatic brightness adjustment because that uses a light sensor, usually located near the keyboard.
This post is about disabling Intel’s Adaptive Contrast Enhancement. What ACE does is automatically adjust the contrast of your display whenever you are viewing a dark or light image or web page for example in order to make it easier on your eyes.
By the looks of this SO thread, the Intel apps don’t work so we need to do it the old fashioned way and edit the windows registry. To do this see the following steps:
- Open start menu/start screen and type “regedit” and press enter.
- Navigate to: HKEY_LOCAL_MACHINE\SOFTWARE\Intel\Display\igfxcui\Media
- Double click the key named “EnableACE”.
- Set its value to 0 in the “value data” field
- Press F5 to refresh the registry
- Reboot your computer.
After this, your Intel ACE should be completely disabled and no longer changing your displays contrast.
This should work in Windows 10 using Intel HD Graphics driver version 220.127.116.1131.