Trackpad does not function after 8 hours of sleep
This has happened to me before to many times. I haven't found one particular thing that works every-time, but after I try different things it eventually starts back up.

Possible solution #1


Unplug all external device from the computer
Hold the power button for 20 seconds then release
Click the power button in attempt to boot


This sometimes works for me, if it doesn't work, try Possible Solution #2

Possible solution #2

Try an SMC Reset

If this doesn't work then I attempt Possible Solution #2 again. I basically just loop the 2 solutions. Also sometimes leaving it for 5-10 minutes after a couple of cycles.

I apologize that this isn't that exact. But this is my method of fixing this issue, and it has always eventually worked for me.