static/netbsd/man4/acpifan.4 3.html


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<table class="head">
  <tr>
    <td class="head-ltitle">ACPIFAN(4)</td>
    <td class="head-vol">Device Drivers Manual</td>
    <td class="head-rtitle">ACPIFAN(4)</td>
  </tr>
</table>
<div class="manual-text">
<section class="Sh">
<h1 class="Sh" id="NAME"><a class="permalink" href="#NAME">NAME</a></h1>
<p class="Pp"><code class="Nm">acpifan</code> &#x2014; <span class="Nd">ACPI
    Fan</span></p>
</section>
<section class="Sh">
<h1 class="Sh" id="SYNOPSIS"><a class="permalink" href="#SYNOPSIS">SYNOPSIS</a></h1>
<p class="Pp"><code class="Cd">acpifan* at acpi?</code></p>
</section>
<section class="Sh">
<h1 class="Sh" id="DESCRIPTION"><a class="permalink" href="#DESCRIPTION">DESCRIPTION</a></h1>
<p class="Pp">The <code class="Nm">acpifan</code> device driver supports fans
    possibly exposed by the BIOS. Even if a system contains only one physical
    fan, multiple <code class="Nm">acpifan</code> instances may be present. In
    such cases each <code class="Nm">acpifan</code> typically represents an
    <a class="Xr">acpitz(4)</a> thermal zone, and the combined state of all
    instances reveals the speed of the fan.</p>
<p class="Pp">The <code class="Nm">acpifan</code> driver does not support
    controlling the fan. The current state (on or off) is made available through
    the <a class="Xr">envsys(4)</a> API and the <a class="Xr">envstat(8)</a>
    command.</p>
</section>
<section class="Sh">
<h1 class="Sh" id="SEE_ALSO"><a class="permalink" href="#SEE_ALSO">SEE
  ALSO</a></h1>
<p class="Pp"><a class="Xr">acpi(4)</a>, <a class="Xr">acpitz(4)</a></p>
</section>
<section class="Sh">
<h1 class="Sh" id="HISTORY"><a class="permalink" href="#HISTORY">HISTORY</a></h1>
<p class="Pp">The <code class="Nm">acpifan</code> device driver appeared in
    <span class="Ux">NetBSD 6.0</span>.</p>
</section>
<section class="Sh">
<h1 class="Sh" id="AUTHORS"><a class="permalink" href="#AUTHORS">AUTHORS</a></h1>
<p class="Pp"><span class="An">Jukka Ruohonen</span>
    &#x27E8;jruohonen@iki.fi&#x27E9;</p>
</section>
<section class="Sh">
<h1 class="Sh" id="BUGS"><a class="permalink" href="#BUGS">BUGS</a></h1>
<p class="Pp">The <code class="Nm">acpifan</code> driver does not yet support
    additional functionality introduced in the ACPI 4.0 specification.</p>
</section>
</div>
<table class="foot">
  <tr>
    <td class="foot-date">January 9, 2011</td>
    <td class="foot-os">NetBSD 10.1</td>
  </tr>
</table>