.\" Copyright (c) 2005 Christian Brueffer
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.\" $FreeBSD: src/share/man/man4/acpi_sony.4,v 1.3 2010/02/08 21:01:41 gavin Exp $
.\"
.Dd July 4, 2010
.Dt ACPI_SONY 4
.Os
.Sh NAME
.Nm acpi_sony
.Nd "ACPI notebook controller driver for Sony laptops"
.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_sony"
.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_sony_load="YES"
.Ed
.Sh DESCRIPTION
The
.Nm
driver provides support for the notebook controller in Sony laptops.
Note that not all features will work on all laptop models.
.Sh SYSCTLS
The following sysctl nodes are currently implemented:
.Bl -tag -width indent
.It Va hw.acpi.sony.brightness
Current brightness level of the display.
.It Va hw.acpi.sony.brightness_default
Default brightness level of the display (survives reboot).
.It Va hw.acpi.sony.contrast
Current contrast level of the display.
.It Va hw.acpi.sony.bass_gain
Enable or disable the Bass Gain feature.
.It Va hw.acpi.sony.cdp
Turns the CD power on or off.
.It Va hw.acpi.sony.azp
Turns the audio power on or off.
.It Va hw.acpi.sony.lnp
Turns the wired network interface power on or off.
.El
.Sh SEE ALSO
.Xr acpi 4 ,
.Xr sysctl 8
.Sh HISTORY
The
.Nm
driver first appeared in
.Fx 6.0 .
It was then ported to
.Dx 2.5 .
.Sh AUTHORS
The
.Nm
driver was written by
.An Takanori Watanabe Aq Mt takawata@FreeBSD.org .