Well, the kernel update of today seems to have cure the problem Sorry for the useless noise
-- Initramfs does not find the root device when an usb external drive is plugged-in https://bugs.launchpad.net/bugs/494492 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs