Okay, I tried it again, and this time it worked. I don't know what happened last time.
That's what I did... I did F3+C for 20 seconds for good measure, then I tried FN+F3+C for 20.
I did exactly that.
Yes, of course.
In-game is what I was talking about. The debug info is the numbers and words that appear all over the screen when F3 is pressed, right? If so, then yes it appears.
I held F3+C for about a minute and nothing happened.
Here's the report.