> On Apr 29, 2020, at 2:44 PM, Anirban Sinha <ani.si...@nutanix.com> wrote: > > > Note that “these control methods are optional” line. If the OS adheres to the > spec, it should not expect them to exist all the time
Linux for example, detects it here: https://elixir.bootlin.com/linux/latest/source/drivers/acpi/utils.c#L571
