| ACPIFAN(4) | Device Drivers Manual | ACPIFAN(4) |
acpifan — ACPI
Fan
acpifan* at acpi?
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.
The acpifan device driver appeared in
NetBSD 6.0.
Jukka Ruohonen ⟨jruohonen@iki.fi⟩
The acpifan driver does not yet support
additional functionality introduced in the ACPI 4.0 specification.
| January 9, 2011 | NetBSD 11.0 |