Manual Pages — DPMS
– VESA BIOS DPMS driver
driver uses the VESA BIOS to manage an external display during suspend and
When the machine suspends,
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
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|| A typical Unix /bin or /usr/bin
directory contains a hundred different kinds of programs, written by dozens
of egotistical programmers, each with its own syntax, operating paradigm,
rules of use ... strategies for specifying options, and different sets of constraints.
— The Unix Haters' handbook