Why my LCD keypad cannot display anything on the Intel Edison while all right on Romeo?

It works well if uploaded by Arduino 1.5.3 version, however, the latest 1.6.* have discard pin Definition for Edison. So you have to add pinMode(); into the setup() like this:

void setup() {  

for(int i=4;i<10;i++){  

pinMode(i,OUTPUT);

 }  lcd.begin(16, 2);  // set up the LCD's number of columns and rows

}