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Subject: [Bug 196542] System stops booting with "ACPI APIC Table: <INTEL 
 DENLOW>"
Date: Tue, 13 Jan 2015 19:34:20 +0000
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=196542

--- Comment #4 from John Baldwin <jhb@FreeBSD.org> ---
So one thing we are doing between those printfs is starting up the other CPUs. 
Can you build a custom kernel with printfs sprinkled in
sys/amd64/amd64/mp_machdep.c?  cpu_mp_start() and native_start_all_aps() would
be good places to start.

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