My oh my but there's been a lot of posts on this topic, hasn't there? I'd like AIRLINE PILOTS ONLY, PLEASE, to tell me they really believe they were using their laptops and missed all those calls from ATC and others. No pilot is going to remove his/her headset without turning on the speaker, especially if the other pilot is doing the same. There is just no way these two could've done this for NINETY MINUTES. Think about it. Sit there at your computer and start the clock. Can't be done without knowing what else is going on. Let's face it; they were asleep, period.
Naturally, the foregoing is the opinion of the author and not official fact.