05-15-2011
That's not generally a Windows feature, usually that's part of the laptop hardware itself.
The fn-keys though, may not work properly if your kernel doesn't support them. Sometimes the kernel has specific fixes for specific models.
Asus makes lots of laptops. You might as well go looking for parts for a "Ford" as look for fixes for an "Asus". What is it?
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LEARN ABOUT DEBIAN
acpi_sony
ACPI_SONY(4) BSD/i386 Kernel Interfaces Manual ACPI_SONY(4)
NAME
acpi_sony -- ACPI notebook controller driver for Sony laptops
SYNOPSIS
To compile this driver into the kernel, place the following line in your kernel configuration file:
device acpi_sony
Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5):
acpi_sony_load="YES"
DESCRIPTION
The acpi_sony driver provides support for the notebook controller in Sony laptops. Note that not all features will work on all laptop mod-
els.
SYSCTLS
The following sysctl nodes are currently implemented:
dev.acpi_sony.0.brightness
Current brightness level of the display.
dev.acpi_sony.0.brightness_default
Default brightness level of the display (survives reboot).
dev.acpi_sony.0.contrast
Current contrast level of the display.
dev.acpi_sony.0.bass_gain
Enable or disable the Bass Gain feature.
dev.acpi_sony.0.cdp
Turns the CD power on or off.
dev.acpi_sony.0.azp
Turns the audio power on or off.
dev.acpi_sony.0.lnp
Turns the wired network interface power on or off.
SEE ALSO
acpi(4), sysctl(8)
HISTORY
The acpi_sony driver first appeared in FreeBSD 6.0.
AUTHORS
The acpi_sony driver was written by Takanori Watanabe <takawata@FreeBSD.org>.
BSD
February 7, 2010 BSD