This section summarizes the power management requirements for audio components.
23. System and device comply with PCI bus power management specification
Required
PCI-based audio controllers must comply with the PCI Bus Power Management Specification, Revision 1.0 or higher (PCI PM). Any PCI add-on audio device must comply with PCI PM. Audio devices implemented on the system board must comply fully with the ACPI 1.0 specification.
24. Audio device complies with device class power management reference specification
Required
The Audio Device Class Power Management Reference Specification, Version 1.0 or higher, provides definitions of the OnNow device power states (D0–D3) for these devices. The specification also covers device functionality expected in each power state and the possible wake-up event definitions for the class. Implementation of power states D0 and D3 is required. Other power states are optional.
25. Device supports wake-up events
Optional
For PC 98, the ability to cause a wake-up event as defined in the Audio Device Class Power Management Reference Specification, Version 1.0 or higher, is an optional feature.