[Bug 219431] [6.12] amd-pstate / Ryzen 5xxx (Zen 3, Vermeer): Could not retrieve highest performance (-19)

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=219431

--- Comment #9 from Ivan Shapovalov (intelfx@intelfx.name) ---
Created attachment 307082
  --> https://bugzilla.kernel.org/attachment.cgi?id=307082&action=edit
`acpidump -b`, 5950X, ASRock X570M-Pro4, BIOS P3.60

Attaching `acpidump -b` output for my system, which is a 5950X on an ASRock
X570M-Pro4 motherboard. The BIOS is also quite old here.

I'm not observing any specific functional limitations *that I can track to this
issue*.

However, there is this thing that basically nothing I do to the EPP knobs or
the cpufreq governor has any effect on the CPU frequency management behavior.
Also, sometimes under ~75% load (cgroup limited) some cores get stuck at <4GHz
while others boost to expected ~4.7-ish, but I've no idea how to reproduce this
one reliably.

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