=== DragonBoard 410c === You can use fastboot (from the android-tools-fastboot package) to boot U-Boot or flash U-Boot on your DragonBoard 410c. Connect your PC via a USB cable to the micro-USB port on the DragonBoard. Hold the volume down (-) button (S4) and turn on the device to go into fastboot mode. You have two options: you can load U-Boot without flashing it (for example to test U-Boot) or you can flash it to the device. In order to load U-Boot without flashing it, run this command: fastboot boot /usr/lib/u-boot/dragonboard410c/u-boot.img In order to flash U-Boot to the boot partition, run: fastboot flash boot /usr/lib/u-boot/dragonboard410c/u-boot.img You have to reset your device after "fastboot flash boot" to start U-Boot. When U-Boot starts, it will try to boot from attached devices in the following order: * USB * External SD card * Internal SD card (eMMC) At the moment, there's no graphics support, so you will only see the U-Boot output if you have the optional serial console adapter.