So wait, you're still using the LUT, which means you're not doing pass-through. That's why the TV is not switching, most likely. Forget about using a LUT for HDR. Set madVR to HDR pass-through + send metadata, and try again.
MPC-HC has LAV built in, so you should be good to go. You might want to disable any external filters, just in case. Check for LAV settings in the MPC-HC filter section.
And no, I do not use a LUT for HDR.
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Henry | LG OLED65C7P | Denon AVR-X3500H | ELAC Uni-Fi x7 | ELAC Debut 2.0 SUB3030 x2 | NVIDIA SHIELD TV Pro 2019 | Plex
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