Search the VMware Knowledge Base (KB)
View by Article ID

"ACPI Warning: 32/64X length mismatch...." in ESXi VMkernel log (2150410)

  • 0 Ratings

Symptoms

In the /var/log/vmkernel.log file, you see an entry similar to:

ACPI Warning: 32/64X length mismatch in Gpe0Block: 256/0 (20120215/tbfadt-650)

Cause

The issue occurs when certain ACPI fields are 256 bits or longer. It reflects a limitation in the ACPI specification, but is harmless.

Certain ACPI fields have two versions, one with a 32-bit address and an 8-bit length measured in bytes, the second with a 64-bit address and an 8-bit length measured in bits.  A field that requires a 64-bit address and is 256 bits in length or longer cannot be completely represented by either version.  In such cases the industry convention is to use the address from the 64-bit version combined with the length from the 32-bit version.  ESXi implements this convention correctly, but issues a warning message.

Resolution

This is expected behavior and the warning message can be safely ignored.

Request a Product Feature

To request a new product feature or to provide feedback on a VMware product, please visit the Request a Product Feature page.

Feedback

  • 0 Ratings

Did this article help you?
This article resolved my issue.
This article did not resolve my issue.
This article helped but additional information was required to resolve my issue.

What can we do to improve this information? (4000 or fewer characters)




Please enter the Captcha code before clicking Submit.
  • 0 Ratings
Actions
KB: