AMD Platforms May Experience ACPI and P-state CPU Errors (Doc ID 1329381.1)

Last updated on OCTOBER 24, 2016

Applies to:

Sun Fire X4600 M2 Server - Version Not Applicable and later
Sun Ultra 40 M2 Workstation - Version Not Applicable and later
Sun Fire X2100 Server - Version Not Applicable and later
Sun Netra X4200 M2 Server - Version Not Applicable and later
Sun Fire X2200 M2 Server - Version Not Applicable and later
Information in this document applies to any platform.

Symptoms

Customer may experience CPU error messages in /var/adm/messages that resemble the following:

May 22 16:27:24 HOST unix: [ID 388705 kern.warning] WARNING: cpu_acpi: error parsing _PSS for CPU 0
May 22 16:27:24 HOST unix: [ID 196753 kern.warning] WARNING: cpupm_init: processor 0: unable to initialize P-state support
May 22 16:27:30 HOST unix: [ID 388705 kern.warning] WARNING: cpu_acpi: error parsing _PSS for CPU 1
May 22 16:27:30 HOST unix: [ID 196753 kern.warning] WARNING: cpupm_init: processor 1: unable to initialize P-state support

These errors look like a CPU problem but may be seen across multiple CPU sockets and cores.

Changes

This problem may occur after a BIOS update or after a BIOS factory reset.
Clearing CMOS may also reveal this issue.

Cause

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