This is an efivar bug, that's what will generate file paths for efibootmgr, specifically in efi_va_generate_file_device_path_from_esp() and the code it calls.
** Changed in: efibootmgr (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1796260 Title: UEFI install onto an MBR disk, with a pre-existing os/partition, results in a non-bootable ESP on a logical partition To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/efibootmgr/+bug/1796260/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs