Custom Resolution Utility (CRU)

[Asterra]

Hey all. I was pointed to this app during the course of my attempts to fix a color subsampling issue I'm having with my new Nvidia card. It's apparently a very old, well-established flaw with how Nvidia handles HDTVs as opposed to monitors. The drivers essentially assume the TV can't handle 4:4:4 and thus refuse to pass full color to the display device under any circumstance. One fellow says he fixed this problem by opening CRU, editing his 1080p profile to the "LCD - Reduced" preset, and restarting.

I admit that the advised procedure here feels, to me, arbitrary and unrelated to chroma subsampling, but I gave it a whirl. In fact I tried all the presets. But I didn't have the same results. He recommended I ask here to see if any of the experts might have insight into what I could try. Originally, all I was seeking was a valid method for modifying the EDID for this TV in Nvidia's drivers, in order to trick the drivers into believing they were dealing with a monitor. This very hack is known to solve the issue, but unfortunately the instructions for achieving the hack are so old that they no longer quite apply in 2016; I would need to know which file to edit and what exactly to add to it, and that part of the instructions hails from 2008.

Before anyone asks: Yes, my TV does accept 4:4:4 just fine. My previous card, an AMD R9 290X, gave me zero issues providing full color. I also have a very old laptop on standby which is also perfectly capable of providing full color. Same port, same HDMI cable. Yes, I know how to test whether it's working or not. It's not the TV. It is the Nvidia drivers.