I admit this isn’t a very scientific way of diagnosing a GPU problem, possibly related to all my software problems, since the big update, that seem to point to some kind of GPU issue, lately. But…I decided I’d see how some old computer video games played. I first tried Torchlight and it played fine. Then I decided to play Left For Dead II…a little more graphics intense. And it crashed twice in less than 30 minutes. No error messages, it just disappeared and dropped back to the Steam menu. It’s never crashed before! Interesting.
Except…on further reflection. VS Code works fine on Mint (same hardware)!