Just got my new X9S today. Updated to v1.4.4 now the HDMI picture freezes after about a second but the audio continues to play. So disappointed. Going to have to plug the old X9 in and maybe consider returning the X9s if a fix isn't available very soon.
Figured out whats happening. I have an older plasma TV with a max resolution of 720p. Satellite box was inputting 1080p. After setting sat box to 720p output and system reset all is good.