As a workaround, I suggest simply reformatting the ESP.
** Summary changed: - grub-efi cannot install on locked ESP (Input/output error) + grub-efi cannot install on damaged filesystem (Input/output error) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1090829 Title: grub-efi cannot install on damaged filesystem (Input/output error) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/dosfstools/+bug/1090829/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
