Kernel Interfaces Manual
NAME acpifan — ACPI Fan
SYNOPSIS acpifan* at acpi?
device driver supports fans possibly exposed by the BIOS. Even if a system contains only one physical fan, multiple acpifan
instances may be present. In such cases each acpifan
typically represents an acpitz(4)
thermal zone, and the combined state of all instances reveals the speed of the fan.
The acpifan driver does not support controlling the fan. The current state (on or off) is made available through the envsys(4) API and the envstat(8) command.
HISTORY The acpifan device driver appeared in NetBSD 6.0.
AUTHORS Jukka Ruohonen <email@example.com>
BUGS The acpifan driver does not yet support additional functionality introduced in the ACPI 4.0 specification.