Win8.1 screen brightness can not be adjusted how to do?

Win8.1 screen brightness can not be adjusted how to do? Will explain win8.1 brightness can not adjust the solution, many users said that the process of using win8.1 too, want to adjust the brightness but no response, how is this going on? Please see below.

法一,

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_MACHINESYSTEMControlSet001ControlClass{4d36e968-e325-11ce-bfc1-08002be10318}

Then 0000 and 0001 The value of KMD_EnableBrightnessInterface2 can be changed 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 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 of Win8.1 screen can not be adjusted 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 alone In the graphics card device, you can find the CPU comes with a graphics card and a separate graphics card, so we need to uninstall the discrete graphics driver, and restart the computer, and ultimately 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 normally.

Once again, using Master Lu's driver butler, once again installed the HD4000 core graphics driver installed on the i7 processor, there is no problem, and the screen brightness is still normal.

The above two win8.1 screen brightness can not be adjusted, we will try it~