Maybe the Tab has something similar going on.
I have a SkullCandy headphones+mic. They have a single button next to the mic. This button works to pause/play the Meridian music player on my Droid Incredible. Pushing the button twice rapidly pauses and then skips to the next track and plays. If I push the button when no music player is open, it opens Meridian and plays. If I push when some other music player is open, it opens Meridian and plays.
Presumably the button works by changing the resistance over the headphone wires. Checking the resistance between the sleeve (which seems to be ground) and the other contacts (Tip, Ring1, Ring2) I find that without the button pressed, the resistance is about 1 kOhm for all three. Pushing the button changes the resistances to be: 17 Ohm, 17 Ohm, 1 Ohm for the Tip, Ring1, Ring2 respectively.
That would be cool.
He must swivel it out to wake the Tab's screen, right? If so, this can be fixed by enabling the "keep screen on when charging" option in system settings, right?