agx原装套件，外接一个U盘，此u盘已经通过iso刻录一个Ubuntu 20.04的系统， agx有bios吗？ 有的话，能通过配置bios启动项，直接启动u盘内的系统吗？
你直接燒原版的Ubuntu是開不了機的
而且你在網路上可以下載到的Ubuntu大部分都是給x86 PC用的，就算有arm版本也缺少NVIDIA的BSP
請用SDK Manager重新flash一次，在storage device的地方選擇USB
您说的这个方式是可以的。就是想了解，agx开机有方式能进入bios或者grub的方式吗？ 还是不支持bios和grub启动配置？
開機的時候按ESC可以進UEFI boot menu然後選要從哪個儲存裝置開機
這些很基本的東西我們的文件裡都有寫…
https://docs.nvidia.com/jetson/archives/r35.4.1/DeveloperGuide/text/SD/Bootloader/UEFI.html
You should know that you can enter the bootloader; for JetPack 5.x/L4T R35.x, this is UEFI. Jetsons though do not have an actual BIOS. The functions which a BIOS would provide exist instead in software. For eMMC models like the AGX Xavier, this is in partitions. Whenever you flash a Jetson, you are flashing these (or their equivalents):
- Operating system.
- Bootloader/UEFI.
- CMOS BIOS (it isn’t really CMOS BIOS, but it is equivalent, e.g., bringing up clocks and power rails in the proper order, training memory timings, so on).
Thus, Jetsons cannot self-flash. Any boot device thus needs to be supported in the boot stage software since there is no BIOS to provide basic device access. An illustration of this is the fact that purely SD card models have an SD card driver added to the boot software (e.g., in UEFI), and eMMC models cannot boot to SD card (these models do not have the drivers; they could have the drivers, if added, but by default do not). You can add various boot device drivers within UEFI, but you cannot expect access via “standard” mechanisms which might be provided from a true BIOS.