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

--- Comment #9 from John Baldwin <j...@freebsd.org> ---
That is really weird to be reading 1 byte of 0x24-0x27.  0x24 is a BAR and
nothing should be reading individual bytes of that.  Can you get a stack trace
for a read of register 0x24 with size 1 (kdb_backtrace() should print out a
stack trace)?

Given that that is right after ACPI registers its interrupt, I wonder if it's
something weird in the DSDT itself doing the register accesses?  Providing the
acpidump might be useful as well if the stack trace ends up in ACPI.

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