On Mar 14, 2006, at 7:41 AM, Pete French wrote:

But FreeBSD will not boot SMP with the second processor installed. It behaves exactly as it did with a single processor and ACPI enabled - i.e. it stops at the 'Waiting for SCSI devices to settle" point and does not get beyond
this.

when you boot, at the FreeBSD menu, break to the command prompt and type this:

debug.acpi.disabled=timer
boot

and see if it works. I have one system on which 5.4 works flawlessly, but anything from 6.0-REL and up requires I disable the ACPI timer.

If it works, just add the above line to your /boot/loader.conf file to make it stick across reboots.

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