Blah. Two steps forward, one step back. The new kernel hangs up when I tried to do this blog, saying it all worked. Well, it didn't work, and I went back to 4.20 rc7. 4.20 doesn't work at all.
My general experience is that it will not work for the whole series (5.0). We'll have to wait for 5.1. But I shall erase this, as if it never happened.