Weird Gray Venom Like Spreading

I tried my best to describe it in the title.

So basically what you’re seeing is when it passed a couple minutes, at first it starts from the right bottom part of the screen, and keep spreading all the way until it covers the entire screen.

This happen right after the verbose screen, the only solution to get bypass this problem is by closing the lid for a minute or so and once opening, I’m suddenly in the login screen (with flickering in the top part of the screen).

This doesn’t happen usually, so I’d say like 1/10 boots.

What do I do?, it’s annoying!