xref: /freebsd/share/man/man4/dpms.4 (revision 2eb4d8dc723da3cf7d735a3226ae49da4c8c5dbc)
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31.Dd August 23, 2008
32.Dt DPMS 4
33.Os
34.Sh NAME
35.Nm dpms
36.Nd VESA BIOS DPMS driver
37.Sh SYNOPSIS
38.Cd "device dpms"
39.Sh DESCRIPTION
40The
41.Nm
42driver uses the VESA BIOS to manage an external display during suspend and
43resume.
44When the machine suspends,
45the
46.Nm
47driver turns the external display off.
48When the machine resumes,
49it restores the display to its state when the driver was first loaded.
50.Sh SEE ALSO
51.Xr acpi_video 4
52.Sh BUGS
53The VESA BIOS DPMS calls do not provide any way to identify a particular
54display or adapter to manipulate.
55As a result,
56this driver may have unexpected results on systems with multiple displays
57and/or adapters.
58