I know this is a couple weeks old, but one thing you mentioned that I don't see anyone else comment on is that you said the PC is going through a HDMI splitter. Did you ever try going direct to the TV? Also did you try changing which port the TV was connected to the splitter? I suspect the issue is a difference in capabilities between the other device on the splitter and the TV, as only one output device will be used as the master with it's capabilities sent down back to the graphics card settings/capabilities. Simply swapping things around might get you a working situation with the TV (I had to do this with my setup as my cable box goes to a HDMI splitter with one going to the TV and the other going to an HDMI capture device for recording/live view TV on my HTPC, and it only works if the TV is on the correct port on the HDMI splitter so that it is the "master").