[Bug 248659] Specific intel chips lock up with P-states active

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=248659

--- Comment #29 from rkoberman at gmail.com ---
Quick question... Has anyone seen this problem seen it on other than Lenovo
systems? It looks like all reports are on Lenovo systems, though some don't
call out the manufacturer. If this is limited to Lenovo, it is likely tie to
their BIOS ACPI, or EC.

I bing this up because there was an issue several year ago when a combination
of C-States and CPU frequency adjustments under TCC could freeze my Lenovo. It
occurred at low-C-state (C3 or slower) and a very low CPU frequency. This was
also Lenovo and "fixed" by disabling TCC. I should also note that turnng off
TCC on my L15 did not help.

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