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Date:      Thu, 23 Oct 2008 20:55:44 +0200
From:      Ulrich Spoerlein <uspoerlein@gmail.com>
To:        David Adam <zanchey@ucc.gu.uwa.edu.au>
Cc:        freebsd-current@freebsd.org
Subject:   Re: CURRENT kernel crashes on boot with BTX error
Message-ID:  <20081023185544.GB1595@roadrunner.spoerlein.net>
In-Reply-To: <alpine.DEB.1.10.0810230107260.3065@martello.ucc.gu.uwa.edu.au>
References:  <alpine.DEB.1.10.0810221249310.3065@martello.ucc.gu.uwa.edu.au> <200810221113.30424.jhb@freebsd.org> <alpine.DEB.1.10.0810230107260.3065@martello.ucc.gu.uwa.edu.au>

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On Thu, 23.10.2008 at 14:16:44 +0800, David Adam wrote:
> I did try a loader from the CURRENT sources, which produced the same 
> output.
> 
> However, the plot thickens. When I don't specify the kernel name with 
> nextboot(8), but instead interrupt the loader and use 'unload; load 
> /boot/kernel/gd-8; load /boot/kernel/gd-8/geom_mirror.ko' and so on for my 
> other modules, the kernel boots quite happily - both using the 7.0 loader 
> and the new one from the CURRENT sources.
> 
> Are there likely to be big differences in the boot process between using 
> nextboot(8) and the unload/load method? I've used nextboot(8) to 
> successfully load other kernels on this machine before.
> 
> In any case, now that I have a successful workaround I can try the patches 
> I was after in the first place. If there's any more information I can 
> provide, or you'd like access to this system (it has serial console and 
> remote power control), let me know.

Wild guess: I think acpi is no longer built as module on recent -CURRENT
but included in the kernel. Perhaps the unload dance you did above
"fixed" the double loading of the module? Could you check if your
nextboot kernel is containing/missing ACPI directly?

Cheers,
Ulrich Spoerlein

PS: I'm not saying ACPI code is at fault, but rather loader code that
loads the modules
-- 
It is better to remain silent and be thought a fool,
than to speak, and remove all doubt.



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