I forgot to say the initramfs message occurs when the external usb mouse and keyboard have become unresponsive, so I cannot use busybox to inspect the state of the system. I have no alternative except to power off the machine.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1557894 Title: Strange usb device format and failure to boot on UEFI system To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/usb-creator/+bug/1557894/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs