Platform Management Features And Functions; Power Sub-System; Advanced Configuration And Power Interface (Acpi); System Initialization - Penguin Computing Relion 1900e Technical Manual

7.2

Platform Management Features and Functions

7.2.1

Power Sub-system

The server board supports several power control sources which can initiate power-up or power-down
activity.
Source
Power button
BMC watchdog timer
BMC chassis control commands
Power state retention
Chipset
CPU Thermal
PCH Thermal
WOL(Wake On LAN)
7.2.2

Advanced Configuration and Power Interface (ACPI)

The server board has support for the following ACPI states:
State Supported
S0 Yes
S1 No
S2 No
S3 No
S4 No
S5 Yes
7.2.3

System Initialization

During system initialization, both the BIOS and the BMC initialize the following items.
7.2.3.1 Processor Tcontrol Setting
Processors used with this chipset implement a feature called Tcontrol, which provides a processor-specific
value that can be used to adjust the fan control behavior to achieve optimum cooling and acoustics. The
BMC reads these from the CPU through PECI Proxy mechanism provided by Manageability Engine (ME). The
BMC uses these values as part of the fan-speed-control algorithm.
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Relion 1900e/2900e Manual

Table 19. Server Board Power Control Sources

External Signal Name or
Internal Subsystem
Front panel power button
Internal BMC timer
Routed through command processor
Implemented by means of BMC internal logic
Sleep S4/S5 signal (same as POWER_ON)
Processor Thermtrip
PCH Thermtrip
LAN

Table 20. ACPI Power States

Working
The front panel power LED is on (not controlled by the BMC).

The fans spin at the normal speed, as determined by sensor inputs.

Front panel buttons work normally.

Not supported
Not supported
Not supported
Not supported
Soft off
The front panel buttons are not locked.

The fans are stopped.

The power-up process goes through the normal boot process.

The power, reset, front panel NMI, and ID buttons are unlocked.

Turns power on or off
Turns power off, or power cycle
Turns power on or off, or power cycle
Turns power on when AC power returns
Turns power on or off
Turns power off
Turns power off
Turns power on
Description
Capabilities
Revision 1.3