Compal Notebook User Manual page 42

after open lid
S5 Power Button
On board LAN (Only in AC mode)
RTC Alarm(Only in AC mode)
S0 Press Lid switch / Sleep Button (Fn+F2) / Power Button
(depends on ACPI OS setting)
User selects the Standby Option in the Windows Shut
Down menu
ACPI OS timer expired
Critical /Low battery (depends on ACPI OS setting)
S0 Press Lid switch/ Sleep Button (Fn+F2) / Power Button
(depends on ACPI OS setting)
User selects the Hibernate Option in the Windows Shut
Down menu
Critical /Low battery (depends on ACPI OS setting)
S0 Press Lid switch / Power Button (depends on ACPI OS
setting)
The Power Button is pressed for 4 seconds (Power
Button Override)
User selects the Shut down Option in the Windows
Shut Down menu
Critical /Low battery (depends on ACPI OS setting)
Thermal critical shutdown performed by EC firmware
Note1: The backlight of LCD should be off when WOL from S3 as it is remote wake up.
Note2: the S3 -> S4 transition results in the system transitioning to the S0 state first so OS can
save the context to the hard disk. The system BIOS/KBC will not be involved for S3 -> S4
transition. The system power scheme will wake the machine from S3 and then transition to S4
Hibernation. The backlight of LCD is off during this transition.
4.7.5 Storage Devices and Batteries
Possible storage devices are FDD, HDD, CD-ROM and DVD-ROM

Floppy Disk and Hard Disk, CD-ROM and DVD-ROM
If close lid, WOL can not wake. System will wake up
S0
S3
S4
S5