I've had this TV for a few weeks and just taken delivery of the new Xbox.
Experiencing some issues with 120hz 4K on HDMI 4. The home dashboard seems to work fine but as soon as I load a game the screen will go blank, have interference lines, switch to mode not supported or no input signal. It seems to be when the TV is switching back and forth between Game Mode.
I have done a live chat with Samsung support who remotely logged into the TV and reset to default and refreshed my HDMI ports but the problem is still there.
I can see others have had this issue on other models but wondering if there's any sort of fix for the Q950R? I can manually get 120hz with FreeShnc to work if I switch Game mOde on after the game has loaded.