Intended audience: Thinkpad owners who are considering Ubuntu 16.04.
We couldn’t get Ubuntu to install successfully in UEFI mode at all, never mind with Secure Boot. The installation would finish, we would reboot, and the computer wouldn’t find an OS. The only way around was to disable UEFI:
- Go into the BIOS at boot time.
- Startup → UEFI/legacy boot and choose legacy only.