After the recent disk failure and subsequent reimage, restbase-dev1006 has ACPI errors in the dmesg output:
[308977.890912] ACPI Exception: AE_AML_BUFFER_LIMIT, Evaluating _PMM (20160831/power_meter-338) [308977.929893] ACPI Error: SMBus/IPMI/GenericSerialBus write requires Buffer of length 66, found length 32 (20160831/exfield-427) [308977.984034] ACPI Error: Method parse/execution failed [\_SB.PMI0._PMM] (Node ffff896e7edc5e60), AE_AML_BUFFER_LIMIT (20160831/psparse-543) [308978.042945] ACPI Exception: AE_AML_BUFFER_LIMIT, Evaluating _PMM (20160831/power_meter-338) [309037.785290] ACPI Error: SMBus/IPMI/GenericSerialBus write requires Buffer of length 66, found length 32 (20160831/exfield-427) [309037.841661] ACPI Error: Method parse/execution failed [\_SB.PMI0._PMM] (Node ffff896e7edc5e60), AE_AML_BUFFER_LIMIT (20160831/psparse-543) [309037.902286] ACPI Exception: AE_AML_BUFFER_LIMIT, Evaluating _PMM (20160831/power_meter-338) [309037.942857] ACPI Error: SMBus/IPMI/GenericSerialBus write requires Buffer of length 66, found length 32 (20160831/exfield-427) [309038.000588] ACPI Error: Method parse/execution failed [\_SB.PMI0._PMM] (Node ffff896e7edc5e60), AE_AML_BUFFER_LIMIT (20160831/psparse-543) [309038.060047] ACPI Exception: AE_AML_BUFFER_LIMIT, Evaluating _PMM (20160831/power_meter-338) [309097.789829] ACPI Error: SMBus/IPMI/GenericSerialBus write requires Buffer of length 66, found length 32 (20160831/exfield-427) [309097.844953] ACPI Error: Method parse/execution failed [\_SB.PMI0._PMM] (Node ffff896e7edc5e60), AE_AML_BUFFER_LIMIT (20160831/psparse-543) [309097.904803] ACPI Exception: AE_AML_BUFFER_LIMIT, Evaluating _PMM (20160831/power_meter-338) [309097.944577] ACPI Error: SMBus/IPMI/GenericSerialBus write requires Buffer of length 66, found length 32 (20160831/exfield-427) [309097.998824] ACPI Error: Method parse/execution failed [\_SB.PMI0._PMM] (Node ffff896e7edc5e60), AE_AML_BUFFER_LIMIT (20160831/psparse-543) [309098.056663] ACPI Exception: AE_AML_BUFFER_LIMIT, Evaluating _PMM (20160831/power_meter-338)
Since we blacklist the acpi kernel module, this is likely some first-boot weirdness that will resolve itself with a reboot.