freebsd-dev/share/man/man4/man4.i386/acpi_asus.4
2004-07-06 16:24:02 +00:00

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.\" Copyright (c) 2004 Philip Paeps <philip@FreeBSD.org>
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.Dd April 22, 2004
.Dt ACPI_ASUS 4 i386
.Os
.Sh NAME
.Nm acpi_asus
.Nd Asus Laptop Extras
.Sh SYNOPSIS
.Cd "device acpi_asus"
.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.
.Pp
Currently, the following laptops are fully supported:
.Pp
.Bl -item -offset indent -compact
.It
L2D
.It
L3C
.It
L3D
.It
L3H
.It
L8L
.It
M1A
.It
M2E
.El
.Sh SYSCTLS
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_video 4 ,
.Xr sysctl.conf 5 ,
.Xr sysctl 8
.Rs
.%T The Acpi4Asus Project
.%O 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.