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

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

--- Comment #14 from John Baldwin <jhb at FreeBSD.org> ---
In terms of the dump, what I would want to see is if there are any _INI methods
trying to do PCI accesses, and if so I'd have probably want to see what is in
the _INI method.  It might also be a _REG method rather than an _INI method.

The other thing to do is to do a backtrace for the register read of 0xb to see
where that happens (probably from the same _REG/_INI method though) and maybe
add some debug tracing in ACPICA to see how much farther it gets before
rebooting.  There might be existing ACPICA debug tracing knobs you can turn on
that will show that already.

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