MBP won't wake up after sleep?

[Imola Ghost]

Sometime when I stop using my MBP for a minute or so, the screen goes black and won't wake up. I can see that the lights are on the keyboard and it's running but won't wake up. I will have to hold the power button down and then restart. Does any one know how to fix this? It's starting to do it more and more ofter.

 

[Dekimasu]

Maybe this.

https://forums.macrumors.com/threads/497345/