OpenGL Full-Screen Issues

I have mostly played SRB2 with 1280x720 res, and OpenGL fullscreen. And it's normally fine.
Until today.
TODAY I now have the issue of whenever I put on fullscreen with OpenGL, it's just black. A black screen. Now if I go into Windowed mode, it's perfectly fine. Even Software fullscreened works! It's just OpenGL. I messed with resolutions and sometimes it worked, but then I got a visual glitch, so I leave the window and re-focus it, and now it's black again. I can play Windowed mode, so this isn't the end of the world, but any type of solution is welcome here.

Try this:

DylanDude said:

Try this: View attachment 125867

Click to expand...

I had the same problem, let's give it a try

DylanDude said:

Try this: View attachment 125867

Click to expand...

Just did, and to no luck. Nothing changed.
The weird thing is that everything was fine before on this PC and my last one until yesterday. But I didn't really do anything game-changing, it just was black. Any other ideas?

Have you tried alt+tabbing after getting the black screen?

DylanDude said:

Have you tried alt+tabbing after getting the black screen?

Click to expand...

Yeah, and it does nothing at all. If I Window+Tab I can see the game, but it goes black when I prioritize it.

Bumping the thread for any response or help, as I still haven't found any. Any solutions would be appreciated!

Random bump, I know, but today the game weirdly fixed itself? Everything is fine now but I hope there will be a solution in the future!