[Bug 231760] FreeBSD 12.0-ALPHA7 Installations Halts at ACPI on 4 different AMD Ryzen Laptops (HP, DELL, Huawei)

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=231760

--- Comment #11 from John Baldwin <jhb at FreeBSD.org> ---
I have not seen acpidump hang before.  Can you can capture the output you get
from acpidump when it hangs?  In this case I don't need -t, just the -d.  It is
definitely something weird in an ACPI method that your BIOS is doing.  I think
it's some device's _INI routine that is doing the read.

Also, do you know if register 0xb (PCIR_CLASS) is the last register read before
the reboot?

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