This is possibly caused by the new ubuntu3 `grub2` package. We are on releasing an `ubuntu4` which resolves a known issue.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2055235 Title: package grub-efi-amd64-signed 1.201+2.12-1ubuntu1 failed to install/upgrade: installed grub-efi-amd64-signed package post- installation script subprocess returned error exit status 10 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub2-signed/+bug/2055235/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs