Just got my G9 and it is suffering from the same issue. I'm almost wondering if it's the cable, but I'm doubtful the stock cable they ship with is bad... DP input shows for a split second then the screen goes black. Nothing works, only way to fix is to manually unplug the DP cable and replug it back in which is a nightmare just to wake from sleep. I went on the latest 1006.2 firmware incase that was the issue, but sadly it did not help. Very frustrating to spend $1,500 on a monitor that cannot wake from sleep... will probably go back to my LG monitor until Samsung can provide me with some sort of direction or clarity on what the proper fix is.
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