Can you try just upgrading grub-common and grub2-common first and then upgrading shim-signed?
E.g. by: apt update apt install --only-upgrade grub-common grub2-common apt install --only-upgrade shim-signed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2056597 Title: package shim-signed 1.57+15.8-0ubuntu1 failed to install/upgrade: il sottoprocesso installato pacchetto shim-signed script post- installation ha restituito lo stato di errore 10 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/shim-signed/+bug/2056597/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
