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

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From: <bugzilla-noreply_at_freebsd.org>
Date: Wed, 27 Mar 2024 16:21:08 UTC

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

--- Comment #36 from Matthias Lanter <freebsd@lanter-it.ch> ---
Maybe this case should be split up.

The reference in comment 35 and further research led me to this commit:
https://cgit.freebsd.org/src/commit/?id=9a7bf07ccdc1c7d5e6b514067a5d4175cae9d56e

As can be seen in acpidump, an INT override is included:

  Type=INT Override
  BUS=0
  IRQ=1
  INTR=1
  Flags={Polarity=active-lo, Trigger=edge}

After I commented out the line 146 & 147 and recompiled the kernel, the
internal keyboard works without any problems.

Shouldn't this ACPI entry be given more weight than faulty old BIOS versions,
especially with the newer AMD Ryzen?

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