How to resolve 'DCP Panic - Assert!' error and blank screen issues on MacBook Pro?

Sometimes my MacBook screen goes blank, and then it restarts or it will come back after I leave the lid closed and then open it, or it will be stuck like that until I restart.

AND THIS ANNOYING ERROR MESSAGES SAYS EVERYTIME THAT I HAD A DCP PANIC!!

LIKE BROOO HOW MANY TIMES WILL MY MACBOOK WILL GET A DCP PANIC?!

[Re-Titled by Moderator]