Two (and a half?) days ago, when I started up MTGA, I got only a black screen. Still going on. I've updated Steam, no change. I uninstalled MTGA, deleted the installation/game folder, and reinstalled, still just a black screen. I've restarted my computer and even deleted the swap file (memory). No splash screen, no menu, nothing but black. The game worked fine the previous evening, less than 12 hours earlier. No problems at all until that morning (2 days ago) showed only a black screen. Other Steam games still work fine, no problems at all. But MTGA does not work.

Linux computer, pretty high end, using Steam Proton (5.0-10, though I've tried other versions as well, all still producing the black screen).

As I say, all was good, having played more than 2,000 hours before this black screen.

Game works fine on my partner's Windows laptop (pretty low end).