Laptops Unable to adjust brightness on Windows 8 - Macbook

A

ahd

Discoverer
Hi,
I recently brought a Macbook Air (Mid-2012), I installed Windows 8 Pro on it using the latest Bootcamp. Everything is working fine, except I'm unable to control the brightness. When I press F1 - F2, I do get the overlay and it shows brightness increasing/decreasing but the brightness stays at its full. It doesn't work. The brightness settings in the Charms Bar as well as the Control Panel doesn't work and stays disabled.
Is this a bug ? and is there any workaround for this ?
 
its just one set of drivers and not auto updating drivers, isnt it ?

its just drivers available at time of release of bootcamp.

give it a try.
 
As soon as Windows 8 was installed, all the drivers were automatically setup by Bootcamp. So how do I get the display driver seperately?
 
It was a bug in the firmware itself. There was a new firmware update released which I forgot to do on the Mac OSX. I just did it now and the brightness issues has been resolved.
 
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