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Date:      Thu, 19 Apr 2007 14:33:08 +1000
From:      "Murray Taylor" <MTaylor@bytecraft.com.au>
To:        <freebsd-hackers@freebsd.org>
Subject:   FW: IBM / FreeBSD - Install Update - Seems to be ACPI
Message-ID:  <04E232FDCD9FBE43857F7066CAD3C0F12DF19D@svmailmel.bytecraft.internal>

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In our initial posts, we stated that we seemed to be having issues
getting the machine to boot with the 4 processors, so to bypass this we
disabled ACPI on boot. This allowed us to get past the CPU error and
continue to boot. However down the track we noticed things like the
ethernet adapater not getting picked up, and the big problem - none of
the disks getting recognised.

We have since tried a few things, one of which was removing all but one
of the CPU's. If we do this, and boot with ACPI enabled, all is totally
fine. All disks are found, and I receive no CPU panic error.

So it appears to me that by disabling ACPI in an attempt to bypass the
QUAD CPU problem, we are causing another issue behind the scenes.

The root of the problem now appears to be, that if we have anything over
1 CPU, directly after the kernel is loaded (when booting from the CD),
we receive the error message "panic: madt_probe_cpus_handler: CPU ID 38
Too High". The moment a second CPU to the machine....it bombs out.

Murray Taylor

Special Projects Engineer
Bytecraft Systems

P: +61 3 8710 2555
F: +61 3 8710 2599
D: +61 3 9238 4275
E: mtaylor@bytecraft.com.au=20


--

"Any intelligent fool can make things bigger and more complex... It
takes a
touch of genius - and a lot of courage to move in the opposite
direction."
--Albert Einstein=20

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