Seeing this on my PC too.
The message comes from:
/arch/x86/kernel/cpu/cpufreq/powernow-k8.c
As this bug is about the boot message and not the cause of the message
(probably a BIOS bug or a CPU related setting), I'll add the 'ubuntu-
boot-experience' tag.
** Tags added: ubuntu-boot-experience
** Changed in: linux (Ubuntu)
Status: New => Confirmed
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[Firmware Bug]: powernow-k8: No PSB or ACPI _PSS objects
https://bugs.launchpad.net/bugs/440877
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