win8.1 screen brightness can not adjust how to do?

win8.1 screen brightness can not adjust how to do? will explain win8.1 brightness can not adjust the solution, many netizens said the process of using win8.1, want to adjust brightness but no response, this is how it? please see below.

Law I,

1, use WIN+R combination shortcut key to open the Run dialog box, and then use: regedit command to open the registry.

2, after opening the Registry Editor, expand the location in turn:

HKEY_LOCAL_MACHINESYSTEMCONTROLSET001CONTROLCLASS{4D36E968-E325-11CE-BFC1-08002BE10318}

Then change the value of the kmd_enablebrightnessinterface2 in 0000 and 0001 to 0.

3, after the completion, restart the computer can.

Note: If not 0001, only 0000 can be, and the other two items inside if the Kmd_enablebrightnessinterface2 registry key can not be found, new, new type is REG_DWORD.

Some netizens through the above methods, successfully resolved the Win8.1 screen brightness can not adjust the problem, if you use invalid words, please continue to look down.

Law II,

Because the Win8.1 screen brightness is not adjustable, it is usually related to devices such as system setup or video card. So try to uninstall the independent graphics driver, because the notebook is i7, in the graphics device can be found in the CPU with the video card and independent graphics, so we need to uninstall the independent graphics driver, and restart the computer, the final screen brightness is still unable to tune Section.

The next action is to use the Driver wizard, again will be independent graphics driver installed, and then this time I uninstall is the Core i7 processor with the HD4000 kernel video card, the surprise is, when unloading the HD4000 core graphics card, the notebook screen unexpectedly magical, and also can normal adjust the screen brightness.

Once again using the master's driver Butler, the i7 processor will be installed with the HD4000 core graphics driver, and the screen brightness is still normal.

The above two kinds of win8.1 screen brightness can not adjust the solution, we go to try it ~