1.\" $NetBSD: acpipmtr.4,v 1.1 2011/01/05 20:08:13 jruoho Exp $ 2.\" 3.\" Copyright (c) 2010 Jukka Ruohonen <jruohonen@iki.fi> 4.\" All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Neither the name of the author nor the names of any 12.\" contributors may be used to endorse or promote products derived 13.\" from this software without specific prior written permission. 14.\" 15.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS 16.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 17.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 18.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 19.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 20.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 21.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 22.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 23.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 24.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 25.\" POSSIBILITY OF SUCH DAMAGE. 26.\" 27.Dd December 22, 2010 28.Dt ACPIPMTR 4 29.Os 30.Sh NAME 31.Nm acpipmtr 32.Nd ACPI Power Meter 33.Sh SYNOPSIS 34.Cd "acpipmtr* at acpi?" 35.Sh DESCRIPTION 36The 37.Nm 38device driver provides support for 39.Dq power meters . 40These are sensors that approximate the current 41power consumption of the system. 42Alternatively, a power meter may measure also the power gain 43when the system is connected to an external power supply. 44.Pp 45The available information (namely, the power consumption) 46is made available through the 47.Xr envsys 4 48.Tn API 49and the 50.Xr envstat 8 51command. 52.Sh SEE ALSO 53.Xr acpi 4 , 54.Xr acpibat 4 55.Sh HISTORY 56The 57.Nm 58device driver appeared in 59.Nx 6.0 . 60.Sh AUTHORS 61.An Jukka Ruohonen 62.Aq jruohonen@iki.fi 63.Sh CAVEATS 64The 65.Nm 66driver is experimental. 67