Computer Setup-Power - HP Z228 Maintenance And Service Manual

Computer Setup—Power
NOTE: Support for specific Computer Setup Power options might vary depending on the hardware
configuration.
Option
OS Power Management
Hardware Power
Management
Thermal
◦
Clear Secure Boot Keys—Don't Clear/Clear. Allows you to delete any previously loaded custom
boot keys. Default is Don't Clear.
◦
Key Ownership—HP Keys/Custom Keys. Selecting Custom Mode allows you to modify the
contents of the secure boot signature databases and the platform key (PK) that verifies
kernels during system start up, allowing you to use alternative operating systems. Selecting
HP Keys causes the computer boot using the preloaded HP-specific boot keys. Default is HP
Keys.
●
Fast Boot—Enable/Disable. Fast boot disables the ability to interrupt boot, such as pressing
to access items before the operating system loads. Default is disabled.
NOTE: If Windows 8 detects a serious error, it will interrupt the boot process automatically and
display advanced boot options.
From the Start screen, you can press
your computer.
Description
●
Runtime Power Management—Enable/Disable. Allows certain operating systems to reduce
processor voltage and frequency when the current software load does not require the full
capabilities of the processor. Default is enabled.
●
Idle Power Savings—Extended/Normal. Allows certain operating systems to decrease the
processor's power consumption when the processor is idle. Default is extended.
●
ACPI S3 PS2 Mouse Wake Up—Enable/Disable: Enables or disables waking from S3 due to any PS2
mouse activity or a button click.
●
Unique Sleep State Blink Rates—Enable/Disable. This feature is designed to provide a visual
indication of what sleep state the system is in. Each sleep state has a unique blink pattern. Default
is disabled.
NOTE: For Windows 8 systems with Fast Boot support, a normal shutdown goes to the S4 state,
not the S5 state.
◦
S0 (On)—Solid green LED.
◦
S3 (Stand By)—3 blinks at 1Hz (50% duty cycle) followed by a pause of 2 seconds. (green LED)
—Repeated cycles of 3 blinks and a pause.
◦
S4 (Hibernation)—4 blinks at 1Hz (50% duty cycle) followed by a pause of 2 seconds. (green
LED)—Repeated cycles of 4 blinks and a pause.
◦
S5 (Soft Off)—LED is off.
●
SATA Power Management—Enables or disables SATA bus and/or device power management.
Default is enabled.
●
S5 Maximum Power Savings—Turns off power to all nonessential hardware when system is off to
meet EUP Lot 6 requirement of less than 0.5 Watt power usage. Default is disabled.
Fan idle mode—This bar graph controls the minimum permitted fan speed.
NOTE: This setting only changes the minimum fan speed. The fans are still automatically controlled.
shift and select Restart to boot to a device or troubleshoot
Computer Setup (f10) Utility
f keys
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