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From: Vivek Khera <khera@kcilink.com>
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Subject: Re: Bringing up new Intel non-legacy system
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On Nov 7, 2007, at 7:17 PM, Jack Vogel wrote:

> And, is the ACPI subsystem likely to be the source of the problem?

I've had several systems in which I've needed to disable the ACPI  
timer component and then the system worked fine.  in /boot/loader.conf:

debug.acpi.disabled="timer"


When installing, break to boot loader and type: set  
debug.acpi.disabled="timer"

You can try the various acpi components to isolate which one is the  
culprit and leave the rest working.