Ubuntu Feisty 7.04 manual page repository
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Provided by: freebsd-manpages_6.0-5_all
NAME
acpi_video - ACPI Video Extensions driver
SYNOPSIS
device acpi_video
DESCRIPTION
This driver uses the ACPI Video Extensions to control display switching sysctl(8) variables depends on the functions offered by the host’s ACPI implementation. The following sysctls are currently implemented, where 〈device〉 is crt, lcd, or tv: hw.acpi.video.〈device〉.active Current state of the output device. hw.acpi.video.〈device〉.levels List of supported brightness levels. hw.acpi.video.〈device〉.brightness Current brightness level of the device. hw.acpi.video.〈device〉.fullpower Preset brightness level to be used in full power mode. hw.acpi.video.〈device〉.economy Preset brightness level to be used in economy mode. sysctl.conf(5), which is parsed at boot-time. sysctl(8)
HISTORY
The acpi_video driver first appeared in FreeBSD 5.3.
AUTHORS
The acpi_video driver was written by Taku YAMAMOTO 〈taku@cent.saitama-u.ac.jp〉. This manual page was written by Mark Santcroos 〈marks@ripe.net〉.
BUGS
Some systems only perform output switching via SMM even though they export the proper information via ACPI. On such systems, the proper acpi_toshiba(4)) must be used instead.