ACPI Error: SMBus or IPMI write requires Buffer of length 66, found length 32

[daniel_linux]

There are numerous bug reports about errors like this appearing on HP servers running various Linux distributions

The error is

   ACPI Error: SMBus or IPMI write requires Buffer of length 66, found length 32

I've observed it on a MicroServer Gen8

These two bug reports suggest a BIOS update is required to fix the issue:

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1079544

https://www.novell.com/support/kb/doc.php?id=7010449

but I already have the latest BIOS, version J06

Will HP release another BIOS update for the MicroServer Gen8 with this fix?

[Jimmy Vance]

J06 is the ROM family, the latest System ROM is dated 2015.11.02(24 Oct 2016)

[daniel_linux]

Thanks, that appears to be the version in this MicroServer:

# dmidecode -s bios-release-date
11/02/2015

[andrea_daru]

I'm getting the same error on Centos 7 with Proliant Microserver Gen 8:

Oct 31 10:47:30 srv kernel: ACPI Error: SMBus/IPMI/GenericSerialBus write requires Buffer of length 66, found length 32 (20130517/exfield-389)
Oct 31 10:47:30 srv kernel: ACPI Error: Method parse/execution failed [\_SB_.PMI0._PMM] (Node ffff8a673b1a97d0), AE_AML_BUFFER_LIMIT (20130517/psparse-536)
Oct 31 10:47:30 srv kernel: ACPI Exception: AE_AML_BUFFER_LIMIT, Evaluating _PMM (20130517/power_meter-339)

Bios Version:

# dmidecode -s bios-release-date ---> 05/21/2018

Solutions?

[uxbeginner22]

For hp microserver gen8, after upgrading the latest firmware from here

the acpi buffer error disappear, the command

dmesg |grep -i buffer\ leng 

return nothing.,so is ok.

sudo dmidecode -s bios-release-date
04/04/2019