Comment 33 for bug 199533

Maurício: I think the last case you are running into is a different bug. I have the same problem.

I think it may be related to the following bug #1446331, but I am not sure yet - I haven't had a chance to test all the workarounds.

https://bugs.launchpad.net/ubuntu/+source/xen-3.1/+bug/144631

Marco: could you post your working configuration file? and lsmod etc.?