you could used my attach doc to give a try

I have give a try below link u-boot binary , the printenv command work fine

http://www.plugcomputer.org/downloads/d2plug/index.html

BTW I attach some user guide for your refernce , I think you could used it to upgrade your u-boot

I read your post again, your conncern is system version 0.4 or benchmark number too low?

if you also have benchmark number too low question,

I think you porting kernel to new one right

I guess your test not need new kernel, so could you test origion one

you will know it is porting issue or not

do you try not connect wih extrernal usb device to boot up , it work?

Sorry, I don't know you want to used tool-chain to compile app at which product ,I think you need to go to download page to choose your product first,

http://www.plugcomputer.org/downloads/

the new kernel? do you try to used kernel from GlobalScale

I think this is beacuse bluez kernel modules not be inset

I think you could type

"modprobe bluetooth"

than

cd /lib/modules type

"sudo insmod bt8xxx.ko"


used hci command "hciconfig" , I think you will see bluetooth interface