From mboxrd@z Thu Jan  1 00:00:00 1970
From: Marcelo Tosatti <mtosatti@redhat.com>
Subject: Re: Latest Centos6.3 kernel, rebooting from inside centos6.3 VM -
 gets stuck on seabios/grub loop - previous kernels fine
Date: Wed, 18 Jul 2012 18:06:49 -0300
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To: Morgan Cox <morgancoxuk@gmail.com>
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On Wed, Jul 11, 2012 at 10:54:34PM +0100, Morgan Cox wrote:
> Hi
> 
> I have an Ubuntu 12.04 KVM server
> 
> In Centos6 VM's - when I install the latest kernel for centos 6.3 -
> 2.6.32-279.1.1.el6 - if you reboot from inside a Centos6 vm it gets
> stuck in a loop between seabios/grub.
> 
> If i use virsh/virt-manager to reboot its fine, only from inside a
> centos6 vm (with latest centos kernel) does this occur - I am 100% its
> connected with the latest kernel (or at least the 6.3 updates).
> 
> As a test I installed centos 6.2 - this was 100% fine *until* I did a
> yum update then I got the same issue.
> 
> If I use the older kernel with all the rest of the Centos 6.3 updates
> the issue does not occur either (so it 'must'? be related to the
> kernel update)
> 
> How can this be fixed ?

Morgan,

What is the last working kernel RPM version?

Can you disable kvmclock? (by appending "no-kvmclock" to the end of the
"kernel" line of 2.6.32-279.1.1.el6 entry in /boot/grub/menu.lst).