Linux on PowerEdge T40 - Kernel threads kacpi_notify and kacpid continuously spin CPU at 60% after BIOS upgrade

On a PowerEdge T40, the Linux kernel threads kacpi_notify and kacpid continuously eat 60% of a single core following BIOS upgrade to the 1.4.0 version.  I was previously running the 1.3.1 BIOS which did not have the problem. I was considering downgrading back to the 1.3.1 version, but I read that Dell prevents you from downgrading to a version wit security issues.

I tried several Linux kernels (4.19, 5.8, 5.9), but they all had the same issue. The following errors are elicited using the aforementioned kernels. There is a thread elsewhere here that indicates that these errors were to be fixed with this upgrade.

• ACPI Error: No handler for Region [WST1] (000000008a039b11) [GenericSerialBus] (20200717/evregion-132)
  ACPI Error: Region GenericSerialBus (ID=9) has no handler (20200717/exfldio-265)
  ACPI Error: Aborting method \_SB.PCI0.I2C0.PAS1 due to previous error (AE_NOT_EXIST) (20200717/psparse-531)
  ACPI Error: Aborting method \_GPE._L20 due to previous error (AE_NOT_EXIST) (20200717/psparse-531)
  ACPI Error: AE_NOT_EXIST, while evaluating GPE method [_L20] (20200717/evgpe-515)

Here's hoping someone has some insight or suggestions on this issue.