dpms (4)

Leading comments

Copyright (c) 2008 Yahoo!, Inc.
All rights reserved.
Written by: John Baldwin <jhb@FreeBSD.org>

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
   notice, this list of conditions and the following disclaimer.
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   notice, this list of conditions and the following disc...

(The comments found at the beginning of the groff file "man4/dpms.4freebsd".)

NAME

dpms - VESA BIOS DPMS driver

SYNOPSIS

device dpms

DESCRIPTION

The ifconfig driver uses the VESA BIOS to manage an external display during suspend and resume. When the machine suspends, the ifconfig driver turns the external display off. When the machine resumes, it restores the display to its state when the driver was first loaded.

SEE ALSO

acpi_video4

BUGS

The VESA BIOS DPMS calls do not provide any way to identify a particular display or adapter to manipulate. As a result, this driver may have unexpected results on systems with multiple displays and/or adapters.