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NA is Displayed for P-State and T-State on the Power Adjustment Page

Publication Date:  2015-06-24 Views:  308 Downloads:  0

Issue Description

Hardware configuration:
RH2285 V2


Log in to the iMana web user interface (WebUI) of a server and choose PS Management > Power Adjustment. NA is displayed for P-State and T-State, as shown in Figure 1.

Figure 1 Power adjustment page

Handling Process

NA is displayed for P-State and T-State in the following scenarios:

1.  The server operating system (OS) is unexpectedly powered off during startup before the basic input/output system (BIOS) initialization page is accessed, as shown in Figure 2.

Figure 2 Power-off during OS startup

2.  The BIOS is being upgraded.

3.  The management engine (ME) is in the recovery state due to hardware issues.

Root Cause

1.  The ME obtains initialization information from the BIOS during OS startup. The information saved in the last power-on is cleared first. If the OS is powered off at the moment, the ME cannot obtain the CPU information, and therefore the iMana displays NA for the CPU P-State and T-State.

2.  The ME stays in the recovery state during a BIOS upgrade, and the ME does not respond to the commands issued by the iMana for querying the CPU P-State and T-State. After the upgrade, the ME enters the normal state.

3.  The ME enters the recovery state because of a platform controller hub (PCH) fault.


1.  If the BIOS is being upgraded, wait until the upgrade is complete and check whether the fault still occurs. If the BIOS is not being upgraded, restart the server OS.

2.  If the fault persists when the OS is powered on after the BIOS is upgraded, replace the mainboard.

3.  If the OS is unexpectedly powered off during startup, restart the server OS.


The ME is an Intel-developed server management engine. The ME can manage server hardware (in terms of power capping, CPU temperature, and fan status) by responding to commands issued by the iMana.