I've just hit this too: in my case updating an 18.04 instance on AWS. It was not an issue when I last updated/rebooted about a month ago. In my case it prompted me to install onto a disk and a partition during the update, via a lurid full screen display. Not knowing quite what to do I selected *both*, thinking more is safer. I haven't attempted a reboot yet though, so I will now try to reconfigure that to neither. I'm not sure whether this would have actually prevented the instance from booting.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/751057 Title: grub-pc upgrade on Amazon EC2: The GRUB boot loader was previously installed to a disk that is no longer present, or whose unique identifier has changed for some reason. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-on-ec2/+bug/751057/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
