Re: 14.2-RELEASE kernel hangs on Thinkpad T400

Hi,

I wanted to provide an update to the mailing list as this bug appears
to be getting more interesting.

There's one other confirmed case of a different Thinkpad T400 with
this same issue, and kern.smp.disabled=1 allowing it to boot.

There's also a completely different piece of hardware, a Jingsha
B85M-I which won't boot on 14.2-RELEASE without disabling SMP:
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=284275

(Maybe related, maybe not?)

Also, further testing has found that disabling SMP can cause issues
with i915_kms and possibly more:
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=286018

Here's the original bug report about the T400 so you don't have to
dig too far, if you are curious:
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=285867

Would appreciate any help you can offer. Something must have broken
between 14.1 and 14.2 that only manifests on certain hardware.

Thank you!

-Henrich