I downloaded 13.10 today and installed it with Secure Boot set to off on my Surface Pro in a 10GB Partition. I realized afterwards that for personal reasons I need Secure Boot enabled, so I re-enabled it - Ubuntu won't boot anymore with a "Secure Boot violation".
I basically followed the install here on Ask Ubuntu. Boot-Repair claims to have fixed efi boot capabilities but basically changed nothing about the issue as I still can't boot. I also made sure to have shim, grub and the kernel in a signed version as suggested here: https://bugs.launchpad.net/ubuntu/+source/grub-installer/+bug/1184297.
Am I missing anything? I tried inquiring about this in IRC but was told Secure Boot would simply not work with Ubuntu yet, which to my knowledge is not correct.