said by OverrRyde:Anyhow, surprise! I again dropped it from an even lower height than before and now it works! I guess aurgarhor was right!
It was a really bad idea to drop your tablet again.
I used to work at ST in 1999/2000 when first generation mems sensors were being developed. Designers want device to be essentially obliterated by shock before mems elements could be damaged. Please have a look at the maximum g specs of current generation and rest assured the sensor was not damaged.
Their buggy "free fall" handling algorithm most probably caused the original problem after first drop and apparent fix after second drop. It is possible that a hard reset would have done the same.