IERR encountered after CMOS reset and NXBoot executes - Lenovo Flex System x240 Compute Node (9532)

Resolving The Problem

Source

RETAIN tip: H213554

Symptom

When the Complementary Metal Oxide Semiconductor (CMOS) battery is pulled, or if the CMOS reset switch is toggled, or if a NXBoot (Programmable boot times failure recovery mode) executes, the system will throw up an Internal ERRor (IERR).

The symptoms are the system will hang in Power On Self Test (POST), then reset as a result of a CAT error, and power off requiring a manual power on of the system.

Affected configurations

The system may be any of the following Lenovo x86 servers:

• Lenovo Flex System x240 M5 Compute Node, type 9532, any model, any AC1

This tip is not software specific.

This tip is not option specific.

The following system BIOS or UEFI level(s) are affected:

• Build ID: C4E104E

The following system firmware level(s) are affected:

• UEFI Build ID: C4E104E
  

Solution

This behavior will be corrected in a future release of UEFI.

The target date for this release is scheduled for second quarter 2015.

The file is or will be available by selecting the appropriate Product Group, type of System, Product name, Product machine type, and Operating system on IBM Support's Fix Central web page, at the following URL:

• http://www.ibm.com/support/fixcentral/

UEFI needs to issue a DC cycle whenever the system reports that the CMOS has been cleared or if a NXBoot occurs.

Workaround

When the system encounters the IERR, users must reseat the node either virtually or physically. A DC reset will allow the system to move pass the hung state but will not clear the IERR from the Chassis Management Module (CMM) Status of the node.

Additional information

The DC cycle code was removed in the UEFI code.

To clear any IERR, a node must be reseated. Since the defect requires a DC cycle for a fix, the reseat will substitute for the DC cycle. Thus, the system will boot up normally.

The required DC cycle will be added back into UEFI.