Hello people !
I'm trying to install Ubuntu on a Xen server under Centos 5.5.
Here my /etc/xen/ubuntu.cfg : 
name      = "ubuntu"
memory    = 512
disk      = ['phy:/dev/VolGroup0/VM1,xvda,w' ]
vif       = [ 'bridge=xenbr0' ]
kernel    = "/home/test/vmlinuz"
ramdisk   = "/home/test/initrd.gz"
vcpus     = 1
The installation procedure goes fine. At the end, a reboot occurs but the domU doesn't restart. 
What do I modify on my ubuntu.cfg file ? I'm a newbie with Xen, I suppose that I must modify the kernel and ramdisk option. 
Thanks a lot for your help !