From owner-freebsd-scsi@FreeBSD.ORG  Wed Jul 18 17:24:48 2012
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Cc: "freebsd-scsi@freebsd.org" <freebsd-scsi@freebsd.org>
Subject: Re: dev/isp panic (was Re: CAM Target Layer and dev/isp)
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On 7/18/2012 8:58 AM, Trent Nelson wrote:
> Hmm, just to clarify, do you mean "the isp tried to print something 
> that blew up ACPI", or "ACPI blew up whilst isp just happened to be 
> printing something"? Would knowing what isp was trying to print be of 
> any help? (I can poke around the *putc buffers if it happens again.) 
> I'm not surprised that ACPI is involved, though. This box has always 
> seemed to run into ACPI issues (HP ProLiant DL585 G1, quad dual-core 
> Opteron, 64GB RAM), like hanging on boot during the pci->bios probe 
> stuff from a kernel circa 2-3 months ago. Trent. 

I wouldn't know. Since there are a limited number of printfs from 
isp_async you could probably narrow it down. Try booting with ACPI 
disabled. Or upgrade f/w.