Two ways to adjust the brightness of Win8.1 screen

Many newcomers will encounter such a problem. When using a computer, sometimes due to changes in ambient light, we usually adjust the brightness of the screen to make the eyes better adapted, but such a simple question. It can't be implemented on Win8.1 system. If you want to adjust the brightness of the screen, but it doesn't respond, what is going on? Let's take a look.

Method One:

1. Open the Run dialog with the Win+R combination shortcut and open the registry with the :regedit command.

2. After opening the Registry Editor, expand the location:

HKEY_LOCAL_MACHINE\\SYSTEM\\ControlSet001\\Control\\Class\\{4d36e968-e325-11ce-bfc1-08002be10318}

Then change the value of KMD_EnableBrightnessInterface2 in 0000 and 0001 to 0.

3, after the completion, restart the computer.

Note: If there is no 0001, only change 0000, and if you can't find the KMD_EnableBrightnessInterface2 registry key in these two items, you can create a new one, and the new type is REG_DWORD.

Some netizens have successfully solved the problem that the brightness and darkness of Win8.1 screen cannot be adjusted through the above methods. If you use invalid, please continue to look down.

Method 2:

Because the brightness and brightness of Win8.1 screen cannot be adjusted, it is usually related to system settings or graphics cards, so try to uninstall the driver of the discrete graphics card, because the notebook is i7 Obviously, the CPU can be found in the graphics card device and the discrete graphics card, so we need to uninstall the discrete graphics driver, and restart the computer, and finally the screen brightness can not be adjusted.

The next operation is to use the driver wizard, and then install the discrete graphics driver again, then this time I uninstalled the HD4000 core graphics card that comes with the Core i7 processor. Surprise is that when uninstalling HD4000 The core graphics card, the notebook's screen turned out to be magically bright, and can also adjust the screen brightness.

again on i7 core processor comes with HD4000 graphics driver installed, there is no problem, there is still normal screen brightness adjustment. Using the above two methods, I believe that the adjustment of your Win8.1 screen brightness can be solved, friends with this problem, hurry up and act.