Cannot adjust brightness after display driver update on Satellite L855-118

Hi.
I just bought an SATELLITE L855-118 , with ATI graphics today, it was between this and another one, but i know you have problems updating graphic drivers on a Sony-notebooks.
I made a restore point.
So i uninstalled the ATI catalyst and then did an driver sweeper, and re-booted and then installed catalyst 12.6 , installed fine, but my screen went to maximum brightness and i cannot adjust it, the brighness osd appears but the screen brightness does not change.
So i used my restore point.
This time i overwrote the stock catalyst 8.9 with 12.6, just the same cannot adjust the brightness.
Does anybody know how to fix this.
My full spec in the link below.
Satellite L855-118 - Product Specifications - Toshiba
Thanks
John.

This is not going to help you, but I have details on the internals of brightness control on this machine.
On other notebooks I've worked with, the hotkeys generated an event that was directly handled by the firmware (ACPI) that changed the brightness; this was done to avoid putting into the AMD video driver any system-dependent code.
On the L855 the ACPI does not really handle the notification, it just generates another event that is supposed to be handled by the video driver. For more technical details see:
[http://thread.gmane.org/gmane.comp.video.dri.devel/71255]
Now this is where it gets ugly: if brightness control is indeed system-dependent (e.g. you have to poke some random GPIO) then the AMD driver will never support it (it would have to know the details of each and every model in circulation).
The good news - at least for Linux users - is that AMD just published the specification of its ACPI interface:
[http://thread.gmane.org/gmane.comp.video.dri.devel/71697]
I've already done some experiments with it, keep an eye on the thread.
This may (or may not...) lead to a usable brightness control *for Linux*, but the same information *may* be used to create a similar driver for Windows.

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waterworshipper
Many many apologizes. In the screenshot in post 5 I circled Program Files instead of Program Data although I wrote Program Data in the written instruction elsewhere. Please watch this post for the correction.
Very sorry. You did great. I messed up.
Correction
(Since I cannot get back into Post 5 to edit it, I going through the process of getting Post 5 deleted. What follows here is the replacement.)
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