Yes it's perplexing. It works fine on 2 other PC's I have tried it on, just not this one which is my main PC. I think it's possibly to do with the kernel Amipup is using, probably too old for this hardware.
I will keep trying different things as they come to mind and report any success here. I downloaded Slacko and Lucid Puppy last night but not tried them yet, will see if I can try them out a bit later.