This is appearing repeatedly on cloudnet2002-dev:
aborrero@cloudnet2002-dev:~ 53s 2 $ sudo dmesg -T | tail [Mon Jan 21 17:08:13 2019] ACPI Exception: AE_AML_BUFFER_LIMIT, Evaluating _PMM (20160831/power_meter-338) [Mon Jan 21 17:08:20 2019] ACPI Error: SMBus/IPMI/GenericSerialBus write requires Buffer of length 66, found length 32 (20160831/exfield-427) [Mon Jan 21 17:08:20 2019] ACPI Error: Method parse/execution failed [\_SB.PMI0._PMM] (Node ffff96de2ec67ac8), AE_AML_BUFFER_LIMIT (20160831/psparse-543) [Mon Jan 21 17:08:20 2019] ACPI Exception: AE_AML_BUFFER_LIMIT, Evaluating _PMM (20160831/power_meter-338) [Mon Jan 21 17:09:13 2019] ACPI Error: SMBus/IPMI/GenericSerialBus write requires Buffer of length 66, found length 32 (20160831/exfield-427) [Mon Jan 21 17:09:13 2019] ACPI Error: Method parse/execution failed [\_SB.PMI0._PMM] (Node ffff96de2ec67ac8), AE_AML_BUFFER_LIMIT (20160831/psparse-543) [Mon Jan 21 17:09:13 2019] ACPI Exception: AE_AML_BUFFER_LIMIT, Evaluating _PMM (20160831/power_meter-338) [Mon Jan 21 17:09:20 2019] ACPI Error: SMBus/IPMI/GenericSerialBus write requires Buffer of length 66, found length 32 (20160831/exfield-427) [Mon Jan 21 17:09:20 2019] ACPI Error: Method parse/execution failed [\_SB.PMI0._PMM] (Node ffff96de2ec67ac8), AE_AML_BUFFER_LIMIT (20160831/psparse-543) [Mon Jan 21 17:09:20 2019] ACPI Exception: AE_AML_BUFFER_LIMIT, Evaluating _PMM (20160831/power_meter-338)