Table of Contents
Advertisement
Power Management
Power Saving Mode Phenomenon List
Power Saving Mode
Device Standby mode
Global Standby mode
System Suspend mode
NOTE:
The VGA BIOS should support DPMS (Desktop Power Management System) for the standby and suspend mode
function call. When the Display Standby Timer expires, the system BIOS will execute the DPMS service routines.
24
Phenomenon
Independent power management timer for HDD devices (0-15
minutes, time step = 1 minute)
Hard disk drive goes into STANDBY mode (for ATA standard
interface)
Disable V-sync to control the VESA DPMS monitor
Resume method: device activated (keyboard for DOS, keyboard &
mouse for Windows)
Resume recovery time: 3-5 seconds
Global power management timer (1-60 minutes)
Hard disk drive goes into STANDBY mode (for ATA standard
interface)
Disable H-sync and V-sync signals to control the VESA DPMS
monitor
Resume recovery time: 7-10 seconds
Independent power management timer (1-60 minutes) or pushing
external switch button
CPU goes into SMM (System Management Mode)
CPU asserts STPCLK# and goes into the Stop Grant State
LED on the panel flashes in amber color
Hard Disk Drive goes into SLEEP mode (for ATA standard
interface)
Disable H-sync and V-sync signals to control the VESA DPMS
monitor
Return to original state by pushing external switch button.
Chapter 1
Advertisement
Table of Contents
