My problem was due to a previous Windows installation which was done in Legacy mode. Thus, installing ubuntu in legacy mode solved the issue. This is not a bug rather a fail on my side because I did not realised the Windows installation had created a NTFS recovery partition instead of an EFI one. My bad. Closing the issue as for now.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1767703 Title: Calling 'apt-install grub-efi-amd64-signed' failed To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub-installer/+bug/1767703/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
