Does the option to "Boot from EFI file" appear when secureboot is on and legacy mode is off? If you choose that option, are you able to browse to the USB disk?
** Changed in: shim (Ubuntu Raring) Status: Incomplete => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1100247 Title: Unable to install Ubuntu on laptop without enabling Legacy mode To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/shim/+bug/1100247/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs