The optimal setting for each of the DPMS timeouts depends on the application. For
example, the timeout on a point-of-sale (PoS) terminal could be fairly low, because in
normal operation, the user will interact with the display almost continuously.
Suspend Active Off Max 2 W <10 seconds
Off Off Off Max 1 W <30 seconds
State name H-sync V-sync
Maximum power used (Energy
Star - Tier 2, January 2006)
Typical time to
On state
3.12
56 Chapter 3: Basic X.org Configuration
However the timeout for a lecture hall podium projector should probably be set
much higher because the keyboard and mouse might not be touched for significant
periods, even though many people could be studying the image.
Ideally, the timeouts should be set so that the screen does not blank during normal
use, but does go into a power-saving mode when the display is legitimately unused.
Selecting very short timeouts for DPMS may actually reduce hardware
life, especially for the fluorescent tubes used to illuminate many LCD
screens. A minimum setting of 8??“10 minutes is safe for most hardware.
(Some newer LCD screens are illuminated with LEDs, which can
be turned on and off without consequence.)
3.12 Configuring Video Card Driver Options
Many of the X.
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