[Xen-users] Xen 3.4.1: pygrub Error: Boot loader didn't return any data!

[Gerry Reno <greno@xxxxxxxxxxx>]

I converted a kvm guest to a PV guest converting grub2 to grub and 
running update-grub in the guest but it does not want to start.  I 
remembered to adjust the indexing from hd0,5 in grub2 to hd0,4 in grub 
legacy but for some reason pygrub cannot boot it.  I don't even get a 
grub prompt.  Can anyone see anything wrong with this config?
The host is running latest pv_ops dom0 kernel and so is the guest.  Both 
are ubuntu 9.10.
The original /boot was on /dev/vda5 which I changed everywhere to 
/dev/xvda5 before shutting down the guest.  The root is on 
/dev/mapper/... (lvm).
name = "CLOUD-CC-1"
maxmem = 1024
memory = 1024
vcpus = 1
bootloader = "/usr/bin/pygrub"
on_poweroff = "destroy"
on_reboot = "restart"
on_crash = "restart"
disk = [ "tap:aio:/var/lib/xen/images/CLOUD-CC-1.img,xvda5,w" ]
vif = [ "mac=00:16:1a:2a:ef:56,bridge=virbr0" ]

# vi *.py
#
# xm create CLOUD-CC-1.py
Using config file "./CLOUD-CC-1.py".
Error: Boot loader didn't return any data!


-Gerry




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