Ubuntu GNOME would probably work fine, except when it comes to video. People run similar stacks on the Pinebook Pro, which is the same SoC design. Unfortunately

Ubuntu GNOME would probably work fine, except when it comes to video. People run similar stacks on the Pinebook Pro, which is the same SoC design. Unfortunately using a mainline stack with the rk3399 will still get you CPU en/decoded video, rather than using the dedicated VPU. That seems to be changing soon.