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DSDT for Acer Aspire 6920G


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Ok, I think I figured out what BQC is reading the ACPI spec:


B.5.4 _BQC (Brightness Query Current level)

This method returns the current brightness level of a built-in display output device.



Return Value:

An Integer containing the current brightness level (must be one of the values returned from the _BCL method)


So it wants to return a value when the brightness has been changed.

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