https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=292615

--- Comment #28 from ShengYi Hung <[email protected]> ---
(In reply to Martin Cracauer from comment #24)

CPPC is available on your CPU but is unavailable on your machine since _CPC
object does not exist.

See also:
https://www.reddit.com/r/thinkpad/comments/w862zy/cppcpstate_on_thinkpad_e14g2_amd/

We can parse DSDT to see if the _CPC object does exist. If not, we rollback to
legacy pstate driver and we don't need the knob anymore.

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