[Bug 234733] Setting CPU frequency with sysctl dev.cpu.0.fr slows a Ryzen 2700X down

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=234733

--- Comment #1 from sigsys at gmail.com ---
Same thing happens for me on 12-STABLE on a Ryzen 2700.  The CPU frequency
isn't going up once it has been lowered (even though it looks like it does
according to that sysctl, the CPU actually remains much slower).  I haven't
found any BIOS setting that fixes it.  It's on a B450 Pro4 motherboard with
firmware P3.20.

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