From owner-freebsd-acpi@FreeBSD.ORG  Sat Nov  5 10:58:09 2011
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From: Slono Slono <slonoman2011@yandex.ru>
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Date: Sat, 05 Nov 2011 14:58:06 +0400
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Subject: acpi module for asus eepc 1251N outdated
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Good gettimeofday(),

I want to use AsusEEPC 1251N with FreeBSD9, however have found out that in FreeBSD not enough its code supporting.

On acpi the problem consists that asus_acpi not detected the equipment and doesn't give out 
hw.acpi.asus- family MIB, so, Fn-key doesn;t works

If I load 
acpi_video.ko, i see

acpi_video0: <ACPI video extension> on vgapci0

that brightness and power capacity of mine LCD the display raises on 100 and the screen becomes as much as possible bright.
However if to try to regulate value via

sysctl -w hw.acpi.video.lcd0.fullpower=50
sysctl -w hw.acpi.video.lcd0.brightness=50

sysctl returns "Invalid arguments"

How much I have understood, in my case should carry out these functions the acpi_asus.ko module which outdated from
http://sourceforge.net/projects/acpi4asus/ project.

To return brightness back I load Linux LiveCD on Ubuntu/Debian where Fn-key work

I don't understand a code. If I somehow can improve a situation - to give any information on the equipment (or I can give access on netbook via SSH access) - please inform me. 
Very much it would be desirable to see in work FreeBSD.