1.\" $OpenBSD: acpithinkpad.4,v 1.5 2018/05/22 06:29:53 jmc Exp $ 2.\" 3.\" Copyright (c) 2008 joshua stein <jcs@openbsd.org> 4.\" 5.\" Permission to use, copy, modify, and distribute this software for any 6.\" purpose with or without fee is hereby granted, provided that the above 7.\" copyright notice and this permission notice appear in all copies. 8.\" 9.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16.\" 17.Dd $Mdocdate: May 22 2018 $ 18.Dt ACPITHINKPAD 4 19.Os 20.Sh NAME 21.Nm acpithinkpad 22.Nd IBM/Lenovo ThinkPad ACPI support 23.Sh SYNOPSIS 24.Cd "acpithinkpad* at acpi?" 25.Sh DESCRIPTION 26The 27.Nm 28driver provides ACPI support for IBM/Lenovo ThinkPad laptops. 29It responds to various hotkey button presses such as the brightness adjustment 30and wireless toggle keys. 31.Pp 32The 33.Nm 34driver sets up various sensors that indicate the current state of 35certain hardware devices present on ThinkPad laptops. 36These include temperature sensors and fan rotational speed sensors, as well as a 37sensor indicating the current state of the port replicator device. 38These sensors can be used with 39.Xr sensorsd 8 40to perform events on sensor state changes. 41Note that the port replicator indicator will report a state of UNKNOWN 42until the first port replicator connect/disconnect event is received. 43.Sh SEE ALSO 44.Xr acpi 4 , 45.Xr intro 4 , 46.Xr sensorsd 8 47.Sh HISTORY 48The 49.Nm 50driver first appeared in 51.Ox 4.4 . 52