Due won't start after power off-on, have to reset

RayLivingston:
Are there instructions somewhere on how to BUILD the 16U2 firmware? I've got the source, and the LUFA libraries, but I have no clue what environment needs to be setup for the makefile to work.

Regards,
Ray L.

not needed. just upload this file: Due appears as COM6 port but gives error "No device found on COM6" on upload - Arduino Due - Arduino Forum