eMachines EL1800 Service Guide - Page 21
Power Management Function ACPI support function - recovery
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Power Management Function (ACPI support function) Device Standby Mode z Independent power management timer for hard disk drive devices (0-15 minutes, time step=1 minute). z Hard disk drive goes into Standby mode (for ATA standard interface). z Disable V-sync to control the VESA DPMS monitor. z Resume method: device activated (Keyboard for DOS, keyboard & mouse for Windows). z Resume recovery time: 3-5 sec. Global Standby Mode z Global power management timer (2-120 minutes, time step=10 minute). z Hard disk drive goes into Standby mode (for ATA standard interface). z Disable H-sync and V-sync signals to control the VESA DPMS monitor. z Resume method: Return to original state by pushing external switch button, modem ring in, keyboard and mouse for APM mode. z Resume recovery time: 7-10 sec. Suspend Mode z Independent power management timer (2-120 minutes, time step=10 minutes) or pushing external z switch button. z CPU goes into SMM. z CPU asserts STPCLK# and goes into the Stop Grant State. z LED on the panel turns amber colour. z Hard disk drive goes into SLEEP mode (for ATA standard interface). z Disable H-sync and V-sync signals to control the VESA DPMS monitor. z Ultra I/O and VGA chip go into power saving mode. z Resume method: Return to original state by pushing external switch button, modem ring in, keyboard and mouse for APM mode. z Return to original state by pushing external switch button, modem ring in and USB keyboard for ACPI mode. ACPI z ACPI specification 1.0b. z S0, S1, S3 and S5 sleep state support. z On board device power management support. z On board device configuration support. 15