I able to compile gumstix duovero yocto image with tools-sdk feature instead of default debug-tweaks. But when i can't login to gumstix anymore. I tried lot of different passwords like root, overo, duovero, gumstix etc. but none of them seems to work. 

I can't find anywhere on gumstix website for the username and password. If someone help me on this matter that would be really appreciated.