VESA Display Power Management Signaling
From Academic Kids
VESA Display Power Management Signaling (or DPMS) is a standard from the VESA consortium for managing the power supply of video monitors for computers through the graphics card. The most common use is to shut off the monitor after the computer has been idle for some time.
DPMS was based on the Environmental Protection Agency energy star power management specifications.
The standard defines how to signal the H-sync and V-sync pins in a standard SVGA monitor to trigger the monitor's power saving capabilities.
DPMS defines four modes, normal, standby, suspended and off. In off some power may still be drawn in order to power indicator lights. The standard is:
| Normal | Standby | Suspended | Off | |
|---|---|---|---|---|
| H-sync | on | off | on | off |
| V-sync | on | on | off | off |
| Power use | 100% | <80% | <30W | <8W |
Compare to screensaver.
External links:
- VESA Display Power Management Signaling (DPMS) Standard (http://www.vesa.org/summary/sumdpmra.htm)
