Re: FW: IBM / FreeBSD - Install Update - Seems to be ACPI

On Thursday 19 April 2007 12:33:08 am Murray Taylor wrote:

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.

Yes, ACPI enumerates Host-PCI bridges, and trying to enumerate them w/o ACPI
is a bit of a guessing game.

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.

You can use 'set hint.apic.0.disabled=1' for now to keep ACPI and just disable
SMP for now.

--
John Baldwin
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