/var/log/messages is full of this, occurring every second. I can see this has been going on for at least 4 days but any older logs have been purged. Maybe it’s always been like this.
Jul 8 04:07:12 webbox1 kernel: ACPI Error: SMBus or IPMI write requires Buffer of length 66, found length 32 (20090903/exfield-286) Jul 8 04:07:12 webbox1 kernel: ACPI Error (psparse-0537): Method parse/execution failed [\_SB_.PMI0._PMM] (Node ffff88087468bab0), AE_AML_BUFFER_LIMIT Jul 8 04:07:12 webbox1 kernel: ACPI Exception: AE_AML_BUFFER_LIMIT, Evaluating _PMM (20090903/power_meter-342)
Can someone explain what it means, or where I should look to debug further?
Looks like this is a common problem with some older HPE servers.
The first thing you should do is update the system BIOS/firmware.
If the updated firmware doesn’t resolve the problem, you can work around the problem by disabling the ACPI power meter module, e.g.:
echo "blacklist acpi_power_meter" >> /etc/modprobe.d/hwmon.conf
In theory it’s possible to write a custom ACPI table to patch the problem yourself, but that’s more than a bit complicated, and it’s something the hardware vendor should have fixed anyway…
This work is licensed under a Creative Commons Attribution-ShareAlike 3.0 Unported License.