Thanks for the details, it's not clear from the description though what you tried to do exactly to get the error? Was that using the xubuntu installer (and if so what did you do in the partioning step?) or did you end up in that situation by using update-grub manually from one of your existing installations?
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1816240 Title: Impossible to boot 18.04.2 from btrfs To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubiquity/+bug/1816240/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
