Hrm.. if the second line shows "set -ex" then running os-prober should produce a lot of debug output showing every line of the script that is executed. Oh, try running it yourself instead of letting the installer do it.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1770173 Title: 18.04 install stuck on grub install To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/os-prober/+bug/1770173/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
