1.\" $OpenBSD: acpivideo.4,v 1.6 2020/04/06 00:01:08 pirofti Exp $ 2.\" 3.\" Copyright (c) 2009 Paul Irofti <paul@irofti.net> 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.\" 18.Dd $Mdocdate: April 6 2020 $ 19.Dt ACPIVIDEO 4 20.Os 21.Sh NAME 22.Nm acpivideo 23.Nd ACPI video 24.Sh SYNOPSIS 25.Cd "acpivideo* at acpi?" 26.Sh DESCRIPTION 27The 28.Nm 29driver supports ACPI display output switching and brightness control. 30Output displays can take the form of CRTs, LCDs, TV-OUTs or any similar devices 31that may be connected to the machine. 32.Sh SEE ALSO 33.Xr acpi 4 , 34.Xr acpithinkpad 4 , 35.Xr acpitoshiba 4 , 36.Xr acpivout 4 , 37.Xr intro 4 38.Sh HISTORY 39The 40.Nm 41driver first appeared in 42.Ox 4.6 . 43.Sh AUTHORS 44.An -nosplit 45The 46.Nm 47driver was written by 48.An Federico G. Schwindt Aq Mt fgsch@openbsd.org 49and 50.An Paul Irofti Aq Mt paul@irofti.net . 51.Sh CAVEATS 52On IBM and Lenovo ThinkPad systems, 53.Nm 54functionality is handled by the 55.Xr acpithinkpad 4 56driver. 57