UpBoard

Android

• rebuild kernel:
  rm -r out/target/product/x86_64/obj/kernel/vmlinux and vmlinux.o
  rm -r out/target/product/x86_64/kernel  (It's a file)
• build image
  make efi_img

Ubuntu

• 升級kernel為4.4  :
  sudo add-apt-repository ppa:ubilinux/up
  sudo apt update
  sudo apt install linux-upboard-lts-xenial
  sudo apt-get autoremove --purge 'linux-.*generic'
  ref : Here and Here