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ACPIFAN(4) BSD Kernel Interfaces Manual ACPIFAN(4)
acpifan -- ACPI Fan
acpifan* at acpi?
The acpifan device driver supports fans possibly exposed by the BIOS. Even if a system con-
tains 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 <email@example.com>
The acpifan driver does not yet support additional functionality introduced in the ACPI 4.0
BSD January 9, 2011 BSD
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