Philip I agree the partman log seems to show no EFI partition yet the parted list shows one their and it is mounted.
I've now done an Ubuntu build with screenshots for you. Here is the partitioning screen. ** Attachment added: "GUEFI1.png" https://bugs.launchpad.net/ubuntu/+source/ubiquity/+bug/1466047/+attachment/4418694/+files/GUEFI1.png -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1466047 Title: Install in UEFI mode installs grub-pc To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubiquity/+bug/1466047/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs