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Lenovo NotebooksLenovo B and G Series Notebooks Knowledge Base

On screen brightness controls not working on G470 / G570 after loading XP

Question

I downgraded my new G470 / G570 to Windows XP and I've installed the hotkey driver and Lenovo power manager from Lenovo's website, which I know to be required to support the on screen brightness controls, but they still don't work.   What else should I check?

Answer

 

The G470 / G570 BIOS should be at version 2.04 (file 40CN05WW) or higher for these functions to work under XP.

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