thanks very much sir
I tried that earlier as well, should have mentioned, apologies for forgetting to do so.
I just see nothing and then the grub menu shows up as usual

the vm is centos 6u5

I'm on ubu 14.04 for the host
1.2.2-0ubuntu13.1.9 for libvirt-bin


On Fri, Feb 13, 2015 at 2:23 AM, Ján Tomko <jtomko@redhat.com> wrote:
On Thu, Feb 12, 2015 at 03:32:02PM -0600, mail list wrote:
> Maybe this should go to the qemu mail list, but I have domains configured
> to dump to serial. Works fine I see Grub menu/kernel messages and the like,
> but the "bootmenu" listing only shows up over vnc. Is there a way to have
> that show up over serial?
>

I believe
<bios useserial='yes'/>
is the option that makes this work.
http://libvirt.org/formatdomain.html#elementsOSBIOS

Jan