I've noticed that this bug appears only on several instance types such as t3, r5 but t2 instances are not affected by this bug.
The fresh installation of Ubuntu Server 18.04 LTS (HVM), SSD Volume Type (64-bit x86) (ami-0d1cd67c26f5fca19) causes error while `apt-get upgrade` with pc-grub on the t3 and r5 while t2 instances are not affected. -- 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
