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.
 

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