I don't believe the note on https://wiki.ubuntu.com/WilyWerewolf/ReleaseNotes is completely correct at the moment. I just tried to make an amd64 15.10 image from 15.10 and it sort of works in that the uEFI works, but the legacy boot gives the syslinux error.
I don't believe the note on https:/ /wiki.ubuntu. com/WilyWerewol f/ReleaseNotes is completely correct at the moment. I just tried to make an amd64 15.10 image from 15.10 and it sort of works in that the uEFI works, but the legacy boot gives the syslinux error.