@henk Seeing as you CRT has Scart inputs it would be a downgrade to pair it with a Composite cable when the CRT has support for RGB. Look into PI2SCART or Recalbox RGB Dual instead and save yourself the hassle and trouble.

This could work:

https://retropie.org.uk/forum/post/293697

So, there is no way to make this work? :(

I don't think so, but since it's also not working in Windows, the board may be broken ?

I found this mail chain reporting some fix in Ubuntu 19.10 for another very similar Saulabi model, I don't know if helps in any way : https://www.mail-archive.com/search?l=ubuntu-bugs@lists.ubuntu.com&q=subject:"[Bug+786955]+Re%3A+Saulabi+4K+Joystick+(Buttons+not+working)"&o=newest&f=1

That doesn't seem to have any useful information for your problem.

I don't think you'll be able to use Ubuntu 16 to install RetroPie, even if you check out the 4.5.1 version - most of the packages will not work with that old Ubuntu version.
You can try installing the current Debian release or a more recent (18.04) Ubuntu version and install RetroPie as explained in the docs.

@barbudreadmon Again Thank-you!!