path: root/share/man/man4/man4.i386/acpi_ibm.4

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.\" Copyright (c) 2005 Markus Brueffer
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.\" $FreeBSD$
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.Dd June 9, 2005
.Dt ACPI_IBM 4 i386
.Os
.Sh NAME
.Nm acpi_ibm
.Nd "ACPI extras driver for IBM laptops"
.Sh SYNOPSIS
.Cd "device acpi_ibm"
.Sh DESCRIPTION
The
.Nm
driver provides support for hotkeys and other components of IBM laptops.
The main purpose of this driver is to provide an interface,
accessible via
.Xr sysctl 8
and
.Xr devd 8 ,
through which applications can determine the status of
various laptop components.
.Sh SYSCTLS
The following sysctls are currently implemented:
.Bl -tag -width indent
.It Va dev.acpi_ibm.0.initialmask
(read-only)
Bitmask of ACPI events before the
.Nm
driver was loaded.
.It Va dev.acpi_ibm.0.availmask
(read-only)
Bitmask of all supported ACPI events.
.It Va dev.acpi_ibm.0.events
Enable ACPI events and set the
.Va eventmask
to
.Va availmask .
Without the
.Nm
driver being loaded, only the Fn-F4 button generates an ACPI event.
.It Va dev.acpi_ibm.0.eventmask
Sets the ACPI events which are reported to
.Xr devd 8 .
Fn+F3, Fn+F4 and Fn+F12 always generate ACPI events, regardless which value
.Va eventmask
has.
Depending on the ThinkPad model, the meaning of different bits in the
.Va eventmask
may vary.
On a ThinkPad T41p this is a bitwise OR of the following:
.Pp
.Bl -tag -width indent-two -compact
.It Li 1
Fn + F1
.It Li 2
Fn + F2
.It Li 4
Fn + F3
.It Li 8
Fn + F4
.It Li 16
Fn + F5
.It Li 32
Fn + F6
.It Li 64
Fn + F7
.It Li 128
Fn + F8
.It Li 256
Fn + F9
.It Li 512
Fn + F10
.It Li 1024
Fn + F11
.It Li 2048
Fn + F12
.It Li 4096
Fn + Backspace
.It Li 8192
Fn + Insert
.It Li 16384
Fn + Delete
.It Li 32768
Fn + Home (Brightness Up)
.It Li 65536
Fn + End (Brightness Down)
.It Li 131072
Fn + PageUp
.It Li 262144
Fn + PageDown
.It Li 524288
Fn + Space (Zoom)
.It Li 1048576
Volume Up
.It Li 2097152
Volume Down
.It Li 4194304
Mute
.It Li 8388608
Access IBM Button
.El
.It Va dev.acpi_ibm.0.hotkey
(read-only)
Status of several buttons.
Every time a button is pressed, the respecting bit is toggled.
It is a bitwise OR of the following:
.Pp
.Bl -tag -width indent-two -compact
.It Li 1
Home Button
.It Li 2
Search Button
.It Li 4
Mail Button
.It Li 8
Access IBM Button
.It Li 16
Zoom (Fn + Space)
.It Li 32
Wireless LAN Button
.It Li 64
Video Button
.It Li 128
Hibernate Button
.It Li 256
ThinkLight Button
.It Li 512
Screen Expand (Fn + F8)
.It Li 1024
Brighness Up/Down Button
.It Li 2048
Volume Up/Down/Mute Button
.El
.It Va dev.acpi_ibm.0.lcd_brightness
Current brightness level of the display.
.It Va dev.acpi_ibm.0.volume
Speaker volume.
.It Va dev.acpi_ibm.0.mute
Indicates, whether the speakers are muted or not.
.It Va dev.acpi_ibm.0.thinklight
Indicates, whether the ThinkLight keyboard light is activated or not.
.It Va dev.acpi_ibm.0.bluetooth
Toggle Bluetooth chip activity.
.It Va dev.acpi_ibm.0.wlan
(read-only)
Indicates whether the WLAN chip is active or not.
.It Va dev.acpi_ibm.0.fan
(read-only)
Indicates whether the fan is on or off.
.It Va dev.acpi_ibm.0.fan_speed
(read-only)
Fan speed in rounds per minute.
A few older ThinkPads report the fan speed in levels ranging from 0 (off)
to 7 (max).
.It Va dev.acpi_ibm.0.thermal
(read-only)
Shows the readings of up to eight different temperature sensors.
Most ThinkPads include six or more temperature sensors but
only expose the CPU temperature through
.Xr acpi_thermal 4 .
Some ThinkPads have the below sensor layout which might vary depending on the
specific model:
.Pp
.Bl -enum -compact
.It
CPU
.It
Mini PCI Module
.It
HDD
.It
GPU
.It
Built-in battery
.It
UltraBay battery
.It
Built-in battery
.It
UltraBay battery
.El
.El
.Sh SEE ALSO
.Xr acpi 4 ,
.Xr devd 8 ,
.Xr sysctl 8
.Sh HISTORY
The
.Nm
device driver first appeared in
.Fx 5.5 .
.Sh AUTHORS
.An -nosplit
The
.Nm
driver was written by
.An Takanori Watanabe Aq takawata@FreeBSD.org
and later mostly rewritten by
.An Markus Brueffer Aq markus@FreeBSD.org .
This manual page was written by
.An Christian Brueffer Aq brueffer@FreeBSD.org
and
.An Markus Brueffer Aq markus@FreeBSD.org .