The steps I mentioned are in an old laptop using Ubuntu Mate 16.04.
I also have a StellarMate. Which uses a Raspberry Pi. On that one everything works. Probably because all the software was installed and tested at the factory. It also has Ububtu Mate 16.04. If you give up maybe you'd like to buy a StellarMate. They are not expensive and they ship them quickly.

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