# After PMM2 client installation kernel: ACPI Error: SMBus/IPMI/GenericSerialBus write requires Buffer of length 66

**URL:** <https://forums.percona.com/t/after-pmm2-client-installation-kernel-acpi-error-smbus-ipmi-genericserialbus-write-requires-buffer-of-length-66/20425>\
**Category:** PMM 2.x\
**Created:** [March 5, 2023, 12:14pm UTC](https://forums.percona.com/t/after-pmm2-client-installation-kernel-acpi-error-smbus-ipmi-genericserialbus-write-requires-buffer-of-length-66/20425 "2023-03-05T12:14:04Z")\
**Posts on this page:** 1\
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**Author:** ![Vadim\_Yalovets](https://sea1.discourse-cdn.com/flex019/user_avatar/forums.percona.com/vadim_yalovets/32/43_2.png) [@Vadim\_Yalovets](https://forums.percona.com/u/Vadim_Yalovets)\
**Post date:** [March 5, 2023, 7:47pm UTC](https://forums.percona.com/t/after-pmm2-client-installation-kernel-acpi-error-smbus-ipmi-genericserialbus-write-requires-buffer-of-length-66/20425/2 "2023-03-05T19:47:39Z")

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Hi Naresh,

According to the below link, the error is harmless. It indicates that kernel isn’t able to read ACPI power meter values.

> **[ACPI Error(ACPI Error: SMBus or IPMI write requires Buffer of length X, found...](https://access.redhat.com/solutions/48109)**
>
> The output of the dmesg command contains the following errors: ACPI Error: SMBus or IPMI write requires Buffer of length 42, found length 20 (20090903/exfield-286) ACPI Error (psparse-0537): Method parse/execution failed \[\\\_SB\_.PMI0.\_PMM\] (Node...

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