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