screen brightness cannot be adjusted with windows 8 using Sony Vaio

Question

I recently installed Windows 8 upgrade on my Sony Vaio S113 laptop, not happy!!! No problems

before with Windows 7. but now the screen brightness control is inoperative. Help please or I will revert to 7

Answer 1

Hi John,

Welcome to Microsoft communities.

 As I understand that you are not able to adjust screen brightness Windows 8.

1.       Did you make any recent changes prior to the issue?

2.       Do you get any error message/code?

3.       Are you specifying to the monitor settings or the settings in Windows 8

Method 1:  Enable adaptive brightness

1. From the Start Screen, type Control Panel and select the Control Panel.
2. Set the View by: dropdown to Category
3. Select Hardware and Sound.
4. Select Power Options.
5. Select the Change plan settings link on your current power plan
6. Select Change advanced power settings
7. Expand Display
8. Expand Enable adaptive brightness
9. Change the setting to On and select OK.

Method 2: Download and install the latest drivers/ utility software’s from the manufacturer’s website.

http://esupport.sony.com/US/perl/select-system.pl?DIRECTOR=DRIVER&PRODTYPE=24

If the drivers are not available for Windows 8, download for Windows 7 from your manufacturer’s website and install in Windows 7 compatibility mode:

a) Right-click on the driver and click on ‘properties’.

b) Click on the ‘compatibility’ tab and check the box ‘Run this program in compatibility mode for’ and select Windows 7 operating system from the drop down.

c) Click on ‘Apply’ and click ‘OK’ and run the file to install it.

Please post back if you are still experiencing the issue. I will be glad to provide you with additional options available that you can utilize to get this issue resolved.

Method 3: Run SFC scan

1. Type Windows key +W
2. Command Prompt (Admin)
3. Type cmd
4. At the Command Prompt, type: sfc/scannow

This will check for any integrity violations. Restart your system

For reference:

Power plans: Frequently asked questions

http://windows.microsoft.com/en-US/windows-8/power-plans-faq

Please post back if you are still experiencing the issue. I will be glad to provide you with additional options available that you can utilize to get this issue resolved

Answer 2

It seems you have the same problem as me (though I use VAIO S12X9E). If yes, then none of workarounds frs topic or fromom thi anywhere else work and brightess is inoperative and stuck on pretty low level.

Luckily after days of searching I found that there is a way to fix this - Fn+F5/6 still won't work, but other ways to adjust brightness are working, and finally max level is as bright as it was on Win7.

You have to edit registry key FeatureTestControl in:

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Class{4d36e968-e325-11ce-bfc1-08002be10318}\0001 (OR 0000)

Change its value to whatever it was on Win7 (the key can be found in the same place or in CurrentControlSet - you should check it to be sure, but you can also try mine value - then remember to write down your Win8 standard value so You can revert the change in case mine doesn't work for You).

In my case it was fb20 (hex) - that is for VAIO S12X9E with Intel i3 1st gen./Intel HD Graphics.

This fix with right value should work for any Intel HD Graphics.

Answer 3

none of these solutions worked for me. I use a samsung np-nc215-ao3ng

Answer 4

I finally contacted a very helpful Sony support team, they advised me to re-install

my ORIGINAL graphics driver! the very driver that Windows 8 told me to uninstall

during the install of windows 8 upgrade.How strange

Answer 5

screen brightness control is inoperative

How are you trying to change it?   Try using the  Settings from the Start Screen.   E.g. press Win-I  and using the  Brightness  button in it.