Step 5: Tap “ Change advanced power settings” located at the bottom. Step 4: Choose your current power plan and select “ Change plan settings” Step 2: Type in “power” and tap “ Settings”

Step 1: Just swipe in from right side of the screen to reveal the Charms Bar, from where you can tap “ Search” But if you wish to disable it and keep the brightness level under your control or keep it constant, then here we go, Microsoft has enabled this feature by default, so that your device keeps adjusting the brightness level according to the current environment. Save the settings through clicking Apply and then OK. Choose to turn on or turn off this feature for both when it’s on battery power and when the computer is plugged in. Control Panel > Device Manager (opens a window) > Display Adaptors > Intel(R). Also Adaptive Brightness option can turn on/off under Plug in in IGCC. We verify this issue on X1 Extreme Gen 2, and Adaptive Brightness option is show under Plug in in IGCC (Intel graphics control center). Are you wondering why does your Surface dims its screen and never continue to be at constant brightness level? The reason is quite simple, Surface is enabled to adjust its brightness level automatically that’s called as “Adaptive Brightness”. Expand it to show the Adaptive Brightness option. Try rolling back the display driver to the previous version. Re:Turn Off Adaptive Brightness / Contrast While Plugged In (X1 Extreme Gen 2), 6:57 AM.

Adaptive brightness not turning off