acpi_video(4) [freebsd man page]

ACPI_VIDEO(4)						   BSD Kernel Interfaces Manual 					     ACPI_VIDEO(4)

NAME

     acpi_video -- ACPI Video Extensions driver

SYNOPSIS

     device acpi_video

DESCRIPTION

     This driver uses the ACPI Video Extensions to control display switching and backlight brightness.	The availability of the sysctl(8) vari-
     ables depends on the functions offered by the host's ACPI implementation.

SYSCTL VARIABLES

     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.

     Defaults for these variables can be set in sysctl.conf(5), which is parsed at boot-time.

SEE ALSO

     acpi(4), loader.conf(5), sysctl.conf(5), 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
     hotkeys or OEM driver (for example, acpi_toshiba(4)) must be used instead.

BSD
								 November 8, 2004							       BSD

ACPI_TOSHIBA(4) 					 BSD/i386 Kernel Interfaces Manual					   ACPI_TOSHIBA(4)

NAME

     acpi_toshiba -- Toshiba HCI interface

SYNOPSIS

     To compile this driver into the kernel, place the following line in your kernel configuration file:

	   device acpi_toshiba

     Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5):

	   acpi_toshiba_load="YES"

DESCRIPTION

     HCI is Toshiba's Hardware Control Interface which is somewhat uniform across their models.  The acpi_toshiba driver allows the user to manip-
     ulate HCI-controlled hardware using a number of sysctl(8) variables.

SYSCTL VARIABLES

     The following sysctls are currently implemented:

     hw.acpi.toshiba.force_fan
	     Causes active cooling to be forcibly enabled ('1') or disabled ('0') regardless of the current temperature.

     hw.acpi.toshiba.video_output
	     Sets the active display to use according to a bitwise OR of the following:

	     0	     No display
	     1	     LCD
	     2	     CRT
	     4	     TV-Out

	     Only some systems (i.e., the Libretto L5) support video switching via this hardware-specific driver.  Use the acpi_video(4) driver
	     for generic video output support.

     hw.acpi.toshiba.lcd_brightness
	     Makes the LCD backlight brighter or dimmer (higher values are brighter).

     hw.acpi.toshiba.lcd_backlight
	     Turns the LCD backlight on and off.

     hw.acpi.toshiba.cpu_speed
	     Sets the CPU speed to the specified speed.  This provides functionality similar to the hw.acpi.cpu.throttle_state variable.  Higher
	     sysctl values mean lower CPU speeds.

     Defaults for these variables can be set in sysctl.conf(5), which is parsed at boot-time.

LOADER TUNABLES

     The hw.acpi.toshiba.enable_fn_keys tunable enables or disables the function keys on the keyboard.	Function keys are enabled by default.

     This behaviour can be changed at the loader(8) prompt or in loader.conf(5).

SEE ALSO

     acpi(4), acpi_video(4), loader.conf(5), sysctl.conf(5), sysctl(8)

HISTORY

     The acpi_toshiba driver first appeared in FreeBSD 5.1.

AUTHORS

     The acpi_toshiba driver was written by Hiroyuki Aizu <aizu@navi.org>.  This manual page was written by Philip Paeps <philip@FreeBSD.org>.

BSD
								 February 19, 2004							       BSD