Up to now everything is speculation only, based on accounts from the passengers, which will get more and more alarming as time goes on.
The real intesity of the dive will not be known until the DFDR is opened and read, and then the findings made public (if at all).
As for the laptop, it depends...if the laptop user turned wireless internet on, then it would start emitting signals and they can interfere with radio equipment. If you dont believe it, put a wireless modem or mobile phone next to a working radio and see what happens to the radio signals.