Can you add the 'debug-ubiquity' boot parameter (without the quotes, obviously) to one of the systems that drops to a live environment, and attach /var/log/syslog and /var/log/installer/debug?
** Changed in: ubiquity (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/706117 Title: Installation fails using preseed file and network install -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs