Feisty doesn't start

[nestor2509]

Binary package hint: mdadm

I know this have been post somewhere else, but I don't know if it has a solution. My problem is that when I start Ubuntu Feisty, which is just installed I can't start my system. With the older version of the kernel (Dapper) I haven't that problem.
The load bar at the boot doesn't run and when I click Alt+F1, that's what appears:

mdadm: No devices listed in conf file were found

I already try to do what is show in this page:
./scripts/local-top/mdadm
lvm vgscan
lvm vgchange -a y
exit

But the problem is that I don't know if I'm doing right (I try this just below the message at the boot, mdadm: No devi...).
I try to follow the instructions in: /usr/share/doc/mdadm/README.upgrading-2.5.3.gz. But I didn't understand to much and when I open the mdadm.conf file, that's what appears:
DEVICE partitions
MAILADDR root

I don't know what to do, can someone of you help me I told me exactly what I have to do?
I will appreciate that, really.
Thanks for all the help

[Massimo Forti (slackwarelife)]

This is the duplicate of this:

https://bugs.launchpad.net/ubuntu/+source/mdadm/+bug/108971