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ACPIFAN(4) |
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.
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.