ACPI S3 sleep related oprations

1. Testbed: Dell dimension computer
2. Use "R-W everything" to read the ACPI tables.
3. Find following in the SSDT table:

Scope(\)
{
Name(\_S0, Package(4) {Zero, Zero, Zero, Zero})
Name(\_S3, Package(4) {0x03, 0x03, Zero, Zero})
Name(\_S4, Package(4) {Zero, Zero, Zero, Zero})
Name(\_S5, Package(4) {0x02, 0x02, Zero, Zero})
}

4. Explanation about S4 is in ACPI spec, Section 7.3.4 System \_Sx states