Windows 10: Pc no signal after enabling HDR

I was playing around with the setting menu and i enabled HDR under settings. Right after my monitor shows no signal detected even after i tried to reboot. I am able to assess to the BIOS though.

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Cannot Enable HDR

The HDR option does not appear in 'Display' settings.

I am using:

Intel UHD 630 Integrated Graphics

Cardas HDMI cable

LG 27UK650 Monitor

The LG monitor's HDR works with a Playstation 4 Pro and Cardas HDMI cable.

The LG monitor has no manual HDR setting. It only enters HDR mode when it receives proper signal, first.

Windows 10 only offers HDR setting when it receives proper signal from the display, first.

How can HDR be force-enabled on Windows 10?

 

HDR setting in Windows 10 won't stay enabled

Hello,

I recently purchased an HDR/4K-compatible graphics card (a GeForce 1080ti). I have a 4K HDR display (LG C7 65" OLED). When I first installed the card and drivers, the HDR option was turned on by default, and I was getting an HDR signal to the display. However,
the resolution was set to 1920x1080. When I changed the resolution to 4K, HDR turned off. Since then, I have been unable to get HDR enabled again. When I try to enable HDR, the setting just turns itself off again, like so:

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This is not an issue with my display or receiver, as I'm able to get HDR out of my PS4 just fine, and I don't believe it to be an issue with my HDMI cable either, since I was getting HDR out of the PC when I first installed the card.

I'm not sure what other steps to take. I ran dxdiag, and it appears that it's not detecting the full color range:

Display Color Space: DXGI_COLOR_SPACE_RGB_FULL_G22_NONE_P709 (as per this article: HDR and WCG color settings in Windows 10).

From that same article, it appears to be detecting the display as HDR compatible:

Monitor Advanced Color Capabilities: BT2020RGB BT2020YCC Eotf2084Supported AdvancedColorSupported

Thanks for looking, any help would be greatly appreciated.

 

HDR won't enable!

This sounds like the exact same problem I am having, just different hardware. TV is a Sony XBR65X930C. When set to 3840x2160 I see the option to turn on HDR in the display settings but attempting to turn it on results in my TV flickering and the option going
back to unchecked. If I set the output resolution to 1920x1080, I can finally enable HDR and it stays enabled but it appears applications are still having trouble properly enabling HDR (need to test more).

All drivers and TV firmware are up to date. I can confirm I can get 4K HDR to work on that TV using other devices like a PS4 as well so the capability is there. Just not sure how to get it to work correctly on my PC.