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.\" Copyright (c) 2004 Philip Paeps <philip@FreeBSD.org>
.\" All rights reserved.
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.\" modification, are permitted provided that the following conditions
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.\" $FreeBSD$
.\"
.Dd February 8, 2010
.Dt ACPI_ASUS 4
.Os
.Sh NAME
.Nm acpi_asus
.Nd Asus Laptop Extras
.Sh SYNOPSIS
To compile this driver into the kernel,
place the following line in your
kernel configuration file:
.Bd -ragged -offset indent
.Cd "device acpi_asus"
.Ed
.Pp
Alternatively, to load the driver as a
module at boot time, place the following line in
.Xr loader.conf 5 :
.Bd -literal -offset indent
acpi_asus_load="YES"
.Ed
.Sh DESCRIPTION
The
.Nm
driver provides support for the extra ACPI-controlled gadgets, such as hotkeys
and leds, found on recent Asus (and Medion) laptops.
It allows one to use the
.Xr sysctl 8
interface to manipulate the brightness of the LCD panel and the display output
state.
Hotkey events are passed to
.Xr devd 8
for easy handling in userspace with the default configuration in
.Pa /etc/devd/asus.conf .
.Pp
Currently, the following Asus laptops are fully supported:
.Pp
.Bl -item -offset indent -compact
.It
xxN
.It
A1x
.It
A2x
.It
A3N
.It
A4D
.It
A6VM
.It
D1x
.It
J1x
.It
L2B
.It
L2D
.It
L2E
.It
L3C
.It
L3D
.It
L3H
.It
L4E
.It
L4R
.It
L5x
.It
L8x
.It
M1A
.It
M2E
.It
M6N
.It
M6R
.It
S1x
.It
S2x
.It
V6V
.It
W5A
.It
Eee PC
.El
.Pp
Additionally,
.Nm
also supports the Asus-compatible
.Em ATK0100
interface found in
.Em Samsung P30/P35
laptops.
.Sh SYSCTL VARIABLES
The following sysctls are currently implemented:
.Bl -tag -width indent
.It Va hw.acpi.asus.lcd_brightness
Makes the LCD backlight brighter or dimmer (higher values are brighter).
.It Va hw.acpi.asus.lcd_backlight
Turns the LCD backlight on or off.
.It Va hw.acpi.asus.video_output
Sets the active display to use according to a bitwise OR of the following:
.Pp
.Bl -tag -width indent -compact
.It Li 0
No display
.It Li 1
LCD
.It Li 2
CRT
.It Li 4
TV-Out
.El
.Pp
Some models also support video switching via the generic
.Xr acpi_video 4
driver.
Most models do not, however.
.El
.Pp
Defaults for these variables can be set in
.Xr sysctl.conf 5 ,
which is parsed at boot-time.
.Sh SEE ALSO
.Xr acpi 4 ,
.Xr acpi_asus_wmi 4 ,
.Xr acpi_video 4 ,
.Xr sysctl.conf 5 ,
.Xr sysctl 8
.Rs
.%T The acpi4asus Project
.%U http://sourceforge.net/projects/acpi4asus/
.Re
.Sh HISTORY
The
.Nm
driver first appeared in
.Fx 5.3 .
.Sh AUTHORS
.An -nosplit
The
.Nm
driver and this manual page were written by
.An Philip Paeps Aq philip@FreeBSD.org .
.Pp
Inspiration came from the
.Em acpi4asus project
started by
.An Julien Lerouge
which maintains a driver implementing this
functionality in the
.Tn Linux
kernel.