[Bug 270707] Installer media doesn't boot on Thinkpad T14s Gen 3 (Ryzen 7 Pro 6850U)

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=270707

--- Comment #35 from Matthias Lanter <freebsd@lanter-it.ch> ---
The computer starts when hint.uart.1.at is commented out in the device.hints as
described here:
https://bugs.freebsd.org/bugzilla//show_bug.cgi?id=276011#c8

Unfortunately, the internal and external keyboards do not work in this way
either.

Since there were also such problems with the keyboard and trackpad under Linux
and these have now been resolved, I looked into this a little:
https://bugzilla.kernel.org/show_bug.cgi?id=216804#c18

The comment in the code: "IRQ override isn't needed on modern AMD Zen systems
and
this override breaks active low IRQs on AMD Ryzen 6000 and newer systems. Skip
it."

Could it be that it has something to do with that? Is there anything similar in
FreeBSD?

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