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Screen Brightness on HP 8540w


chofete
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Hello

 

I have a hackintoshed HP 8540w, it´s almost working 90%.

 

One of the things that it´s not working is the brighnest level control.

 

If i start with AC connected it works a full brightness. If i start without AC connected it works al low brightness level.

 

The graphic card is a nVidia FX Quadro 880m.

 

If i open Screen Preferences i saw a Brightness bar under screen resolution, i touch it but it´s locked (can move but always return to the same place).

 

I can press keys to change the brightness but alwasy at same level.

 

I found a thread talking about it:

 

http://www.insanelymac.com/forum/index.php?showtopic=220057

 

I tryed to write it on the dsdt.aml i use, but i can´t compile it.

 

I attach the dsdt.aml with the correction:

 

dsdt.zip

 

 

I attach the original one too:

 

dsdtoriginal.aml.zip

 

 

If anyone can help me he is helping other people too.

 

Thanks to everyone.

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