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Question

I have installed the latest driers and since then I am unable to change the screen brightness using function keys. I have installed multiple driver updates hence it is difficult to find out which driver is causing the issue.

 

Any pointers in this regards would be a good help.

Answer

It seems the newest Intel HD driver (from Intel) is causing this issue.

 

Please uninstall it and reinstall the driver provided from Lenovo.

 

The drivers can also be downloaded from the link from table below. Alternatively you can go directly to the Lenovo support site download the drivers which may have more latest drivers.

 

Video
   
Intel Display/VGA driver for Windows 8 (32-bit, 64-bit) - Desktops, Notebooks (Windows 8 Inbox driver) ... Learn more

Version
: N/A


Windows 8 32-bit
Windows 8 64-bit
N/A
     
Intel HD Graphics Driver for Windows 7 (32-bit), Vista (32-bit) - ThinkPad ... Learn more

Version
: 8.15.10.2827

 Intel HD Graphics Driver
 Read me

Windows 7 32bit
Windows Vista 32-bit
07 Nov 2012
Intel HD Graphics Driver for Windows 7 (64-bit), Vista (64-bit) - ThinkPad ... Learn more

Version
: 8.15.10.2827

 Intel HD Graphics Driver
 Read me

Windows 7 64-bit
Windows Vista 64-bit
07 Nov 2012

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Comments
The same is true for the L520 with Intel HD / HD 3000 Graphics, so please update the title of the article accordingly...