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From: Jesse Guardiani <jesse@wingnet.net>
Date: Thu, 31 Jul 2003 17:50:40 -0400
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Subject: Re: 5.1 on an A31p
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Ben Laurie wrote:

> So, after a long pause, I'm trying to get 5.x working on my IBM A31p.
> I've made a boot CD from the 5.1 ISO images, vintage a week or so ago.
> When I boot (in any mode, ACPI on or off, or Safe), it dies immediately
> after discovering firewire:
> 
> firewire0: <IEEE1394(FireWire) bus> on fwohci0
> 
> 
> 
> Fatal trap 12: page fault while in kernel mode
> fault virtual address  = 0x2c
> fault code             = supervisor read, page not present
> instruction pointer    = 0x8:0xc02e5a50
> stack pointer          = 0x10:0xc0ae39b0
> frame pointer          = 0x10:0xc0ae39b4
> code segment           = base 0x0, limit 0xfffff, type 0x1b
>                        = DPL 0, pres 1, def32 1, gran 1
> processor eflags       = interrupt enabled, resume, IOPL = 0
> current process        = 0 (swapper)
> trap number            = 12
> panic: page fault
> 
> Now what?

I had the same problem on an IBM A30p with 5.1. Do this
at the boot loader prompt:

set hw.pci.allow_unsupported_io_range=1

That should take care of it. You'll need to place the part after
'set' in your /boot/device.hints file after you complete the install,
otherwise your kernel will continue to fail at boot.

HTH.

-- 
Jesse Guardiani, Systems Administrator
WingNET Internet Services,
P.O. Box 2605 // Cleveland, TN 37320-2605
423-559-LINK (v)  423-559-5145 (f)
http://www.wingnet.net