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Date: Mon, 15 Dec 2008 09:04:34 +0000
From: "Bryn M. Reeves" <bmr@redhat.com>
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Subject: Re: [linux-lvm] FC8: "no Volumegroups found" after Mainboard-Change, 
	Rescueboot:OK
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Reinald Gfuellner wrote:
> After changing the mainboard, booting of several preexistent
> FC8-Installations fails: "No volume groups found".
> (kernel can not mount root-filesystem.)
> 
> DVD-Rescue-Boot however is OK, volumegroups are found and
> root-filesystem is accessible.
> 
> I've been searching quite a while for a solution.
> 

Have you tried to rebuild your initrd from the rescue environment? It's 
possible that the new motherboard requires a different set of kernel 
modules to boot than the old one.

Regards,
Bryn.