![]() No alternative mechanism exists to signal the monitor driver about shortcut key notifications. ![]() If either the display miniport driver or BIOS-exposed ACPI methods support brightness controls, the monitor driver registers for ACPI notifications of brightness shortcut keys. This is different from the Windows 2000 Display Driver Model, which supports only display panels with an identifier of 0x0110. In the Windows Display Driver Model (WDDM), an ACPI identifier is not used to identify an integrated display panel. For more information about these methods, see the ACPI specification on the ACPI website. If the display miniport driver doesn't support at least the Brightness Control Interface, the monitor driver uses ACPI to query for the _BCL, _BCM, and _BQC methods on the child device.
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