I'm not sure the bug is the same, but it appears to be similar. I tried to use the 26/06/2018 Xubuntu Cosmic image but it failed differently. Apport asked to create a new bug report, and here is the link: https://bugs.launchpad.net/ubuntu/+source/grub- installer/+bug/1778809
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1778113 Title: After install in UEFI mode, grub goes to the Minimal BASH-like mode To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1778113/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs