I have now been able to find the problem, for some reason the xen packages do not create /var/log/xen, and if this directory does not exist, xend startup fails without any informative error message.
** Summary changed: - Problem with blktap and LVM (device numbers) + xend startup fails if /var/log/xen does not exist -- xend startup fails if /var/log/xen does not exist https://launchpad.net/bugs/89133 -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
