Acer Aspire X1935 Acer Aspire X1935 Desktop Service Guide - Page 20

Power Management Function(ACPI support function) Device Standby Mode • Independent power management timer for hard disk drive devices(0-15 minutes,time step=1minute). • 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 3-5sec Global Standby Mode • Global power management timer(2-120minutes,time step=10minute). • 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 method: Resume to original state by pushing external switch Button,modem ring in,keyboard an mouse for APM mode. • Resume recovery time :7-10sec Suspend Mode • Independent power management timer(2-120minutes,time step=10minute)or pushing extern switch button. • CPU goes into SMM • CPU asserts STPCLK# and goes into the Stop Grant State. • LED on panel turns amber colour. • Hard disk drive goes into SLEEP mode (for ATA standard interface). • Disable H-sync and V-sync signals to control the VESA DPMS monitor. • Ultra I/O and VGA chip go into power saving mode. • Resume method: Resume to original state by pushing external switch Button,modem ring in,keyboard an mouse for APM mode • Return to original state by pushing external switch button,modem ring in and USB keyboard for ACPI mode. ACPI • ACPI specification 1.0b • S0,S1,S2 and S5 sleep state support. • On board device power management support. • On board device configuration support. 12 Chapter 1