ACPIFAN(4) BSD Kernel Interfaces Manual ACPIFAN(4)
NAME
acpifan -- ACPI Fan
SYNOPSIS
acpifan* at acpi?
DESCRIPTION
The acpifan 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.
SEE ALSO
acpi(4), acpitz(4)
HISTORY
The acpifan device driver appeared in NetBSD 6.0.
AUTHORS
Jukka Ruohonen <jruohonen@iki.fi>
BUGS
The acpifan driver does not yet support additional functionality introduced in the ACPI 4.0 specification.
BSD
January 9, 2011 BSD
