DPMSShort for Display Power Management Signaling, a VESA interface standard that defines four power management modes for monitors in idle state: on, stand-by, suspend and off. Using DPMS, the display controller (typically the video card or chip from which the monitor receives signals) sends a signal along two signal lines �� horizontal sync (h-sync) and vertical sync (v-sync) -- to the monitor, instructing it to enter into one of the four power management states.
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