I edited line 19 of /var/lib/dpkg/info/grub-efi-amd64-signed.postinst like this:
target=x86_64-efi instead of target=x86_64-efi ; Then it works -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1871968 Title: package grub-efi-amd64-signed (1.139+2.04-1ubuntu24) fails to upgrade on 20.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub-efi-amd64-signed/+bug/1871968/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs