HP 8000 manual Power Management, Smart Cover Lock Optional, Acpi Wake-Up Events, Pme

System Support

Level 0—Cover removal indication is essentially disabled at this level. During POST, status bit is cleared and no other action is taken by BIOS.

Level 1—During POST the message “The computer's cover has been removed since the last system start up” is displayed and time stamp in CMOS is updated.

Level 2—During POST the “The computer's cover has been removed since the last system start up” message is displayed, time stamp in CMOS is updated, and the user is prompted for the administrator password. (A Setup password must be enabled in order to see this option).

Smart Cover Lock (Optional)

The SFF and CMT systems support an optional solenoid-operated locking bar that, when activated, prevents the cover (hood) from being removed. The GPIO ports 44 and 45 of the SIO controller provide the lock and unlock signals to the solenoid. A locked hood may be bypassed by removing special screws that hold the locking mechanism in place. The special screws are removed with the Smart Cover Lock Failsafe Key.

4.5.2 Power Management

These systems provide baseline hardware support of ACPI- and APM-compliant firmware and software. Key power-consuming components (processor, chipset, I/O controller, and fan) can be placed into a reduced power mode either automatically or by user control. The system can then be brought back up (“wake-up”) by events defined by the ACPI 2.0 specification. The ACPI wake-up events supported by this system are listed as follows:

Table 4-7.

ACPI Wake-Up Events

ACPI Wake-Up Event	System Wakes From
Power Button	Suspend or soft-off
RTC Alarm	Suspend or soft-off
Wake On LAN (w/NIC)	Suspend or soft-off
PME	Suspend or soft-off
Serial Port Ring	Suspend or soft-off
USB	Suspend only
Keyboard	Suspend only
Mouse	Suspend only

4-12 www.hp.com Technical Reference Guide