Changhongs EDID profile is wrong. Help!

[Lazarus of Bethany]

I have a Changhong 49" 4K Ultra HD LED TV - UD49YC5500UA

For some reason 1920x1080p is native when it should be 3840x2160p

Nvidia control panel says native 1080p ... I can set 4k in the control panel but its not native.

Nvidia see's this as a 1080p display.

I decided to run MonInfo to get the Changhongs EDID profile and here's the problem. It says the native/preferred timing is 1920x1080. The detailed timing is 1360x768.

[Image: http://s22.postimg.org/h4fzs5pqp/Untitled.png]

3840X2160p is not listed anywhere in the EDID profile.

I'm using a 780ti GPU with latest drivers. I have a HDMI 1.4 cable straight connection to the TV. HDMI 2,3,4 are all 4k connection. I'm on HDMI 2. Windows 8.1 is my OS.

[Black Octagon]

I believe the HDMI port on the 780 Ti is only version 1.4. It can do 4k but only at 30Hz

[Lazarus of Bethany]

780 Ti can do 4K at 60hz on HDMI 1.4 with chroma sub-sampling 4:2:0
Nvidia new driver enables 4k@60HZ via hdmi

Windows perceive this as a 1080p native display. This effects resolutions I can select.

And because the EDID is not correct I cant do 4K at 60hz on HDMI 1.4

Nvidia drivers enables 4k@60HZ via 1.4 HDMI

Highlights:

"An interesting feature has turned up in NVIDIA’s latest drivers: the ability to drive certain displays over HDMI at 4K@60Hz. This is a feat that would typically require HDMI 2.0 – a feature not available in any GPU shipping thus far – so to say it’s unexpected is a bit of an understatement. However as it turns out the situation is not quite cut & dry as it first appears, so there is a notable catch.

First discovered by users, including AT Forums user saeedkunna, when Kepler based video cards using NVIDIA’s R340 drivers are paired up with very recent 4K TVs, they gain the ability to output to those displays at 4K@60Hz over HDMI 1.4. These setups were previously limited to 4K@30Hz due to HDMI bandwidth availability, and while those limitations haven’t gone anywhere, TV manufacturers and now NVIDIA have implemented an interesting workaround for these limitations"

[Black Octagon]

Ah yes indeed, I had read about this, though I would never want to enable chroma subsampling on my monitor, personally.

I wonder why your EDID is incorrect. Have you tried to override it with CRU?

Moreover, what iteration of HDMI is used for the monitor? Does that too only need to be v1.4?

[Lazarus of Bethany]

I tried CRU a little but I'm scared... its a little over my head. I know its pretty much straight forward but it didn't work for me.. some how it activated DVI on my HDMI connection after rebooting.. I don't even know how that happen so I stop right there.

Yes, no lower than v1.4

I also tried this youtube work around with no luck.. it seems this Changhong sucks! Damn, I should've went with the Seiki! but noooo I had to be different :::crying:::

https://www.youtube.com/watch?v=XLNJOVguVSE

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I took a picture of the Service menu.

A little info on the panel and firmware. Why would a 4k TV have a 1080p panel... am I reading that right? Is this TV up-scaling..

[Image: http://s9.postimg.org/4nd2frmof/2015_01_09_05_37_44_101.jpg]