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

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

--- Comment #25 from Sergei Masharov <serzh at expir.org> ---
Just upgraded 13.0 from RC1 to RC2 and the system hanged during the kernel
boot, last messages in the console were about ugen0.7 ugen0.8 ugen0.9 ugen0.10

hint.hwpstate_intel.0.disabled="1" is present in /boot/loader.conf

It seems that this hint will be applied at a later stage, in RC1 I saw the
similar behavior, but if the kernel was successfully booted, it works perfectly
normal with above hint.

Second boot attempt was successful and the system is now working fine with this
hint.

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