ADLINK ETX-PVR - Manual (Page 51)

Chapter 3 Hardware
ETX-PVR Reference Manual 45
• 4th state is a hibernate or suspend-to-disk state (S4).
This condition stores the state of your system (open files and programs) on the hard disk drive before
powering down. In this state there are no internal operations taking place, except for the internal RTC.
This includes no activity for the RAM, CPU, and external peripherals, such as hard disk drives or CD-
ROMs. The ETX-PVR appears to be off, including the Power-On LED and the S3 Mode LED. Your
system will take longer to wake up in this sleep state than S3, but since your data is saved to the disk, it
is more secure and should not be lost in the event of a power failure.
 To enter a hibernate or suspend-to-disk state, the ETX-PVR must be fully powered on and the OS
transitions the ETX-PVR into this sleep state (S4) under user control.
 To exit this sleep state a wake-up event, such as the Power-On switch, is used to wake up the
ETX-PVR and restore full operation, including the Power-On LED. Typically, pressing the Power-
On switch for less than 4 seconds (default) will restore full operation.
• 5th state is the normal power off or shutdown (S5).
All activity stops except the internal clock, unless the power cord is removed from the power source.
 To go to a fully powered down state, the ETX-PVR must either be powered on, or in a sleep state,
and then the Power-On switch is pressed for more than 4-to-6 seconds.
 To go to a fully powered-up state, press the Power-On switch for less than 4 seconds (default) and
full operation is restored.
The OS may provide additional programming features to change the activation time for each state, and
to shutdown or transition the ETX-PVR at certain times, depending on the way the OS interface is
programmed. Refer to the OS vender’s documentation for power management conditions under the
ACPI standard.