Black Screen After Playing Demo

Whenever I finish playing a demo, the screen turns black. It isn’t crashing, because I can press Shift+Tab and the friends thing comes up. I can still type in the console, however I cannot see anything. I have a pretty old graphics card however this problem has not come up any time before.

Was there an update that caused this or something?

Just quit the game, it’s a demo.

Type disconnect or stopdemo in the console (although you can’t see what you’re typing, try it)

Alright, I’ll try that. If this can’t be fixed it’ll be fine. All I gotta do is restart GMod every time the demo has finished recording/playing.

Still not working.