Hi. Well, I just began experiencing this as of two weeks ago. Strangely, my MacBook pro was not doing this up until I got it back from an apple fix. I turned it to have the battery replaced. They contacted to offer to fix some "function" thing. So, I agreed. I got it back in 8 days. Well, my MacBook didn't come back the same. Now it freezes after idle just like yours. I too, loose feedback, pad becomes locked and no buttons work. In order to solve issue I have to keep rebooting. Sad thing is I don't know if the apple fix caused this or is it just a coincidence or something that happens once a MacBook reaches a certain age. You know what I mean. All I know is that I need help. Anybody have any advice? ?