To resolve it, open the Intel HD graphics control panel, go to Settings > Power, uncheck power saving mode, and click OK button. However, if you have done the above method and the Maximum Screen Brightness is not working at all, the problem is caused by the intel hd graphics setting. Now when your Surface Pro or other Windows 10 device is plugged in, you are able to get maximum display brightness as you need. * Change On battery to On for enabling adaptive brightness to extend battery life, while turn it off when plugged in, and click Apply > OK button to save all. About Video :Has the recent Windows 10 update caused your screen to look dull or low brightness which you are unable to change. Within the submenus, click on the + sign next to “Enable adaptive brightness”. * In the pop up Advanced Settings, click on the plus sign next to Display” section. * Click on “Change advanced power settings” at the bottom. * It will open the Power options in Control Panel, under Choose or customize a power plan, click on “Change plan settings” link next to your selected power plan (By default it is Balanced).
You can also press-and-hold or right-click the battery icon in the system tray of taskbar, and click on Power Options from the menu.
* From your desktop, type Power Options in the Cortana Search box or the Start menu, and select the top one from result. How To adjust maximum screen brightness in Windows 10 manually
