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NetBSD 6.1.5 - man page for acpifan (netbsd section 4)

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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 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.

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
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