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Date:      Fri, 24 Jan 2025 19:01:49 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 284275] Jingsha B85M-I: System hangs on boot unless kern.smp.disabled=1
Message-ID:  <bug-284275-227-3R5JIUkG8H@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-284275-227@https.bugs.freebsd.org/bugzilla/>
References:  <bug-284275-227@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D284275

--- Comment #4 from John Baldwin <jhb@FreeBSD.org> ---
Hmm, a panic without ACPI due to not finding APIC should be deterministic.=
=20
When ACPI is disabled, we use the MP Table to enumerate APICs.  If the tabl=
e is
missing, you will get that panic, if the table is present, you will boot.  =
The
fact that you are only getting that panic sometimes is very odd.  It means =
your
firmware is not always generating that table.

In general though, disabling ACPI is not really recommended on modern syste=
ms.=20
The most helpful next step would be getting a verbose boot to better narrow
down where it is hanging.

--=20
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