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ACPIFAN(4) Device Drivers 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 <firstname.lastname@example.org> BUGS The acpifan driver does not yet support additional functionality introduced in the ACPI 4.0 specification. NetBSD 8.0 January 9, 2011 NetBSD 8.0