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  1. I guess the device tree in the mainline kernel has some problems. Now I'm using Ubuntu Server 20.04 with the following device tree. Basically everything works, except for USB PD. (The OS was installed using iso with u-boot's EFI implementation) Here is the boot log. rk3399-roc-pc-mezzanine.dtb rk3399-roc-pc.dtsi rk3399-roc-pc-mezzanine.dts
  2. Ubuntu 20.04 daily iso build works with 5.6.2 kernel (deb package) from Issues: 1.device tree from mainline doesn't work, currently using dts from 5.4 (5.5?) 2."modprobe.blacklist=fusb302" is needed if you use a PD power supply 3.USB2 in u-boot is not stable, USB3(type-c) in u-boot is not usable 4.directly booting the iso without modification is not possible since you need to provide it with a device tree won't get USB3 working if you take step 2 get correct display using efi boot, append "video=efifb:off" u-boot.log kernel.log
  3. Will it be possible to use the forthcoming SPI u-boot to boot armbian?
  4. It's more generic and is able to easily boot all kinds of OSes (maybe even win10 on arm like the raspberry pi 3b!) the rpi's uefi is a good example:
  5. Does anyone have interest in this project? It looks quite promising!