e83a53abeb
FreeBSD 14.0 is going to ship with a new implementation of the mixer(8) command. Unfortunately, in order to support new features like mute, the command-line interface of the new implementation is not backwards compatible. Update all the remaining documentation and scripts in the src tree to use the new syntax. While here, document in usbhidaction.1 that the mute functionality is now supported. Reviewed by: christos, debdrup, hselasky Approved by: hselasky (src) Fixes: 903873ce1560 Implement and use new mixer(3) library for FreeBSD. Differential Revision: https://reviews.freebsd.org/D34545
507 lines
12 KiB
Groff
507 lines
12 KiB
Groff
.\" Copyright (c) 2005 Christian Brueffer
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.\" Copyright (c) 2005 Markus Brueffer
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd March 13, 2022
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.Dt ACPI_IBM 4
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.Os
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.Sh NAME
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.Nm acpi_ibm
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.Nd "ThinkPad ACPI extras driver"
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.Sh SYNOPSIS
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To compile this driver into the kernel,
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place the following line in your
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kernel configuration file:
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.Bd -ragged -offset indent
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.Cd "device acpi_ibm"
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.Ed
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.Pp
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Alternatively, to load the driver as a
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module at boot time, place the following line in
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.Xr loader.conf 5 :
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.Bd -literal -offset indent
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acpi_ibm_load="YES"
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.Ed
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.Sh DESCRIPTION
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The
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.Nm
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driver provides support for hotkeys and other components of ThinkPad laptops.
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The main purpose of this driver is to provide an interface,
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accessible via
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.Xr sysctl 8
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and
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.Xr devd 8 ,
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through which applications can determine the status of
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various laptop components.
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.Pp
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While the
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.Xr sysctl 8
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interface is enabled automatically after loading the driver, the
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.Xr devd 8
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interface has to be enabled explicitly, as it may alter the default action of
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certain keys.
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This is done by setting the
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.Va events
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sysctl as described below.
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Specifying which keys should generate events is done by setting a bitmask,
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whereas each bit represents one key or key combination.
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This bitmask, accessible via the
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.Va eventmask
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sysctl, is set to
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.Va availmask
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by default, a value representing all possible keypress events on the specific
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ThinkPad model.
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.Ss Xr devd 8 Events
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Hotkey events received by
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.Xr devd 8
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provide the following information:
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.Pp
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.Bl -tag -width "subsystem" -offset indent -compact
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.It system
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.Qq Li ACPI
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.It subsystem
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.Qq Li IBM
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.It type
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The source of the event in the ACPI namespace.
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The value depends on the model.
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.It notify
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Event code (see below).
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.El
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.Pp
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Depending on the ThinkPad model, event codes may vary.
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On a ThinkPad T41p these are as follows:
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.Pp
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.Bl -tag -width "subsystem" -offset indent -compact
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.It Li 0x01
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Fn + F1
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.It Li 0x02
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Fn + F2
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.It Li 0x03
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Fn + F3 (LCD backlight)
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.It Li 0x04
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Fn + F4 (Suspend to RAM)
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.It Li 0x05
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Fn + F5 (Bluetooth)
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.It Li 0x06
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Fn + F6
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.It Li 0x07
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Fn + F7 (Screen expand)
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.It Li 0x08
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Fn + F8
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.It Li 0x09
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Fn + F9
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.It Li 0x0a
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Fn + F10
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.It Li 0x0b
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Fn + F11
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.It Li 0x0c
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Fn + F12 (Suspend to disk)
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.It Li 0x0d
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Fn + Backspace
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.It Li 0x0e
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Fn + Insert
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.It Li 0x0f
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Fn + Delete
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.It Li 0x10
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Fn + Home (Brightness up)
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.It Li 0x11
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Fn + End (Brightness down)
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.It Li 0x12
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Fn + PageUp (ThinkLight)
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.It Li 0x13
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Fn + PageDown
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.It Li 0x14
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Fn + Space (Zoom)
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.It Li 0x15
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Volume Up
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.It Li 0x16
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Volume Down
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.It Li 0x17
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Mute
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.It Li 0x18
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Access IBM Button
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.El
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.Ss Xr led 4 Interface
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The
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.Nm
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driver provides a
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.Xr led 4
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interface for the ThinkLight.
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The ThinkLight can be made to blink by writing
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.Tn ASCII
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strings to the
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.Pa /dev/led/thinklight
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device.
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.Sh SYSCTL VARIABLES
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The following sysctls are currently implemented:
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.Bl -tag -width indent
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.It Va dev.acpi_ibm.0.initialmask
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(read-only)
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Bitmask of ACPI events before the
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.Nm
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driver was loaded.
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.It Va dev.acpi_ibm.0.availmask
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(read-only)
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Bitmask of all supported ACPI events.
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.It Va dev.acpi_ibm.0.events
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Enable ACPI events and set the
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.Va eventmask
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to
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.Va availmask .
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Without the
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.Nm
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driver being loaded, only the Fn+F4 button generates an ACPI event.
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.It Va dev.acpi_ibm.0.eventmask
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Sets the ACPI events which are reported to
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.Xr devd 8 .
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Fn+F3, Fn+F4 and Fn+F12 always generate ACPI events, regardless which value
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.Va eventmask
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has.
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Depending on the ThinkPad model, the meaning of different bits in the
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.Va eventmask
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may vary.
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On a ThinkPad T41p this is a bitwise OR of the following:
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.Pp
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.Bl -tag -width indent-two -compact
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.It Li 1
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Fn + F1
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.It Li 2
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Fn + F2
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.It Li 4
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Fn + F3 (LCD backlight)
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.It Li 8
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Fn + F4 (Suspend to RAM)
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.It Li 16
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Fn + F5 (Bluetooth)
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.It Li 32
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Fn + F6
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.It Li 64
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Fn + F7 (Screen expand)
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.It Li 128
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Fn + F8
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.It Li 256
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Fn + F9
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.It Li 512
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Fn + F10
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.It Li 1024
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Fn + F11
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.It Li 2048
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Fn + F12 (Suspend to disk)
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.It Li 4096
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Fn + Backspace
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.It Li 8192
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Fn + Insert
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.It Li 16384
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Fn + Delete
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.It Li 32768
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Fn + Home (Brightness up)
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.It Li 65536
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Fn + End (Brightness down)
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.It Li 131072
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Fn + PageUp (ThinkLight)
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.It Li 262144
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Fn + PageDown
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.It Li 524288
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Fn + Space (Zoom)
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.It Li 1048576
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Volume Up
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.It Li 2097152
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Volume Down
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.It Li 4194304
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Mute
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.It Li 8388608
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Access IBM Button
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.El
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.It Va dev.acpi_ibm.0.hotkey
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(read-only)
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Status of several buttons.
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Every time a button is pressed, the respecting bit is toggled.
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It is a bitwise OR of the following:
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.Pp
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.Bl -tag -width indent-two -compact
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.It Li 1
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Home Button
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.It Li 2
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Search Button
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.It Li 4
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Mail Button
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.It Li 8
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Access IBM Button
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.It Li 16
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Zoom
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.It Li 32
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Wireless LAN Button
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.It Li 64
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Video Button
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.It Li 128
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Hibernate Button
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.It Li 256
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ThinkLight Button
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.It Li 512
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Screen Expand
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.It Li 1024
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Brightness Up/Down Button
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.It Li 2048
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Volume Up/Down/Mute Button
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.El
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.It Va dev.acpi_ibm.0.lcd_brightness
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Current brightness level of the display.
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.It Va dev.acpi_ibm.0.volume
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Speaker volume.
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.It Va dev.acpi_ibm.0.mute
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Indicates, whether the speakers are muted or not.
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.It Va dev.acpi_ibm.0.mic_mute
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Indicates, whether the microphone led (present on some model) is on or not.
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Note that this does not mean that the microphone input is muted.
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.It Va dev.acpi_ibm.0.thinklight
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Indicates, whether the ThinkLight keyboard light is activated or not.
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.It Va dev.acpi_ibm.0.bluetooth
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Toggle Bluetooth chip activity.
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.It Va dev.acpi_ibm.0.wlan
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(read-only)
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Indicates whether the WLAN chip is active or not.
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.It Va dev.acpi_ibm.0.fan
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Indicates whether the fan is in automatic (1) or manual (0) mode.
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Default is automatic mode.
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This sysctl should be used with extreme precaution, since disabling automatic
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fan control might overheat the ThinkPad and lead to permanent damage if the
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.Va fan_level
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is not set accordingly.
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.It Va dev.acpi_ibm.0.fan_level
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Indicates at what speed the fan should run when being in manual mode.
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Valid values range from 0 (off) to 7 (max) and 8.
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Level 8 is used by the driver to set the fan in unthrottled mode.
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In this mode, the fan is set to spin freely and will quickly reach a very
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high speed.
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Use this mode only if absolutely necessary, e.g., if the system has reached its
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critical temperature and it is about to shut down.
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The resulting speed differs from model to model.
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On a T41p this is as follows:
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.Pp
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.Bl -tag -width indent-two -compact
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.It Li 0
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off
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.It Li 1, 2
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~3000 RPM
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.It Li 3, 4, 5
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~3600 RPM
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.It Li 6, 7
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~4300 RPM
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.It Li 8
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~6400 RPM (Full-speed, unthrottled)
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.El
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.It Va dev.acpi_ibm.0.fan_speed
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(read-only)
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Fan speed in rounds per minute.
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A few older ThinkPads report the fan speed in levels ranging from 0 (off)
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to 7 (max).
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.It Va dev.acpi_ibm.0.thermal
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(read-only)
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Shows the readings of up to eight different temperature sensors.
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Most ThinkPads include six or more temperature sensors but
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only expose the CPU temperature through
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.Xr acpi_thermal 4 .
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Some ThinkPads have the below sensor layout which might vary depending on the
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specific model:
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.Pp
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.Bl -enum -compact
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.It
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CPU
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.It
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Mini PCI Module
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.It
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HDD
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.It
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GPU
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.It
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Built-in battery
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.It
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UltraBay battery
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.It
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Built-in battery
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.It
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UltraBay battery
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.El
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.It Va dev.acpi_ibm.0.handlerevents
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.Xr devd 8
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events handled by
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.Nm
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when
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.Va events
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is set to 1.
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Events are specified as a whitespace-separated list of event code in
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hexadecimal or decimal form.
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Note that the event maybe handled twice (e.g., Brightness up/down) if ACPI BIOS
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already handled the event.
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.El
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.Pp
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Defaults for these sysctls can be set in
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.Xr sysctl.conf 5 .
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.Sh FILES
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.Bl -tag -width ".Pa /dev/led/thinklight"
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.It Pa /dev/led/thinklight
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ThinkLight
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.Xr led 4
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device node
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.El
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.Sh EXAMPLES
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The following can be added to
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.Xr devd.conf 5
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in order to pass button events to a
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.Pa /usr/local/sbin/acpi_oem_exec.sh
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script:
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.Bd -literal -offset indent
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notify 10 {
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match "system" "ACPI";
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match "subsystem" "IBM";
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action "/usr/local/sbin/acpi_oem_exec.sh $notify ibm";
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};
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.Ed
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.Pp
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A possible
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.Pa /usr/local/sbin/acpi_oem_exec.sh
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script might look like:
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.Bd -literal -offset indent
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#!/bin/sh
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#
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if [ "$1" = "" -o "$2" = "" ]
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then
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echo "usage: $0 notify oem_name"
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exit 1
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fi
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NOTIFY=`echo $1`
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LOGGER="logger"
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CALC="bc"
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BC_PRECOMMANDS="scale=2"
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ECHO="echo"
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CUT="cut"
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MAX_LCD_BRIGHTNESS=7
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MAX_VOLUME=14
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OEM=$2
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DISPLAY_PIPE=/tmp/acpi_${OEM}_display
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case ${NOTIFY} in
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0x05)
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LEVEL=`sysctl -n dev.acpi_${OEM}.0.bluetooth`
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if [ "$LEVEL" = "1" ]
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then
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sysctl dev.acpi_${OEM}.0.bluetooth=0
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MESSAGE="bluetooth disabled"
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else
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sysctl dev.acpi_${OEM}.0.bluetooth=1
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MESSAGE="bluetooth enabled"
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fi
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;;
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0x10|0x11)
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LEVEL=`sysctl -n dev.acpi_${OEM}.0.lcd_brightness`
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PERCENT=`${ECHO} "${BC_PRECOMMANDS} ; \\
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${LEVEL} / ${MAX_LCD_BRIGHTNESS} * 100" |\\
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${CALC} | ${CUT} -d . -f 1`
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MESSAGE="brightness level ${PERCENT}%"
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;;
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0x12)
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LEVEL=`sysctl -n dev.acpi_${OEM}.0.thinklight`
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if [ "$LEVEL" = "1" ]
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then
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MESSAGE="thinklight enabled"
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else
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MESSAGE="thinklight disabled"
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fi
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;;
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0x15|0x16)
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LEVEL=`sysctl -n dev.acpi_${OEM}.0.volume`
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PERCENT=`${ECHO} "${BC_PRECOMMANDS} ; \\
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${LEVEL} / ${MAX_VOLUME} * 100" | \\
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${CALC} | ${CUT} -d . -f 1`
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MESSAGE="volume level ${PERCENT}%"
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;;
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0x17)
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LEVEL=`sysctl -n dev.acpi_${OEM}.0.mute`
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if [ "$LEVEL" = "1" ]
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then
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MESSAGE="volume muted"
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else
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MESSAGE="volume unmuted"
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fi
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;;
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0x1b)
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LEVEL=`sysctl -n dev.acpi_ibm.0.mic_led`
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if [ $LEVEL -eq 0 ]; then
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sysctl dev.acpi_ibm.0.mic_led=1
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mixer rec.volume=0
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fi
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if [ $LEVEL -eq 1 ]; then
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sysctl dev.acpi_ibm.0.mic_led=0
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mixer rec.volume=30
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fi
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;;
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*)
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;;
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esac
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${LOGGER} ${MESSAGE}
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if [ -p ${DISPLAY_PIPE} ]
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then
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${ECHO} ${MESSAGE} >> ${DISPLAY_PIPE} &
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fi
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exit 0
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.Ed
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.Pp
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The following example specify that event code 0x04 (Suspend to RAM),
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0x10 (Brightness up) and 0x11 (Brightness down) are handled by
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.Nm .
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.Bd -literal -offset indent
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sysctl dev.acpi_ibm.0.handlerevents='0x04 0x10 0x11'
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.Ed
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.Pp
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in
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.Xr sysctl.conf 5 :
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.Bd -literal -offset indent
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dev.acpi_ibm.0.handlerevents=0x04\\ 0x10\\ 0x11
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.Ed
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.Sh SEE ALSO
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.Xr acpi 4 ,
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.Xr led 4 ,
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.Xr sysctl.conf 5 ,
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.Xr devd 8 ,
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.Xr sysctl 8
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.Sh HISTORY
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The
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.Nm
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device driver first appeared in
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.Fx 6.0 .
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.Sh AUTHORS
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.An -nosplit
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The
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.Nm
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driver was written by
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.An Takanori Watanabe Aq Mt takawata@FreeBSD.org
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and later mostly rewritten by
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.An Markus Brueffer Aq Mt markus@FreeBSD.org .
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This manual page was written by
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.An Christian Brueffer Aq Mt brueffer@FreeBSD.org
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and
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.An Markus Brueffer Aq Mt markus@FreeBSD.org .
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