In case it's relevant, the other options to force non-interactive install were in /etc/apt/apt.conf APT::Get::Show-Upgraded "true"; DPkg::Options {"--force-confmiss";"--force-confold"};
We appear to have worked around it by adding shim-signed shim/disable_secureboot boolean false shim-signed shim/enable_secureboot boolean true in the preseed file. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1603642 Title: (trusty, debconf passthrough) package shim-signed 1.17~14.04.1+0.8-0ubuntu2 failed to install/upgrade: subprocess installed post-installation script returned error exit status 128 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/shim-signed/+bug/1603642/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs