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436 posts

Ultimate Geek

#230689 8-Mar-2018 16:49
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It was hard to describe whats going on so I recorded it.


I am trying to get windows 10 running on my TV through a VSX 531 receiver with 4k + HDR enabled.


Its a Windows 10 with AMD RX550 -> Pioneer VSX 531 -> Samsung  KU7000 TV


When Connecting directly to the TV everything works with HDR and 10bit color space is selectable and working. I  get the following info in dxdiag  when connecting the RX550 directly to the TV and everything works fine.


Current Mode: 3840 x 2160 (32 bit) (60Hz)
HDR Support: Supported
Display Topology: Internal
Display Color Space: DXGI_COLOR_SPACE_RGB_FULL_G2084_NONE_P2020
Color Primaries: Red(0.659680,0.340344), Green(0.244641,0.670422), Blue(0.130383,0.040539), White Point(0.313000,0.329602)
Display Luminance: Min Luminance = 0.010000, Max Luminance = 1499.000000, MaxFullFrameLuminance = 799.000000
Monitor Name: Generic PnP Monitor
Monitor Model: SAMSUNG
Monitor Id: SAM0D3B
Native Mode: 3840 x 2160(p) (60.000Hz)
Output Type: HDMI
Monitor Advanced Color Capabilities: BT2020RGB BT2020YCC Eotf2084Supported AdvancedColorSupported AdvancedColorEnabled




It is when I put the receiver in the middle it fails as shown in the video, The specs does say the receiver supports HDCP 2.2 and Ultra HD (4K/60p/4:4:4) passthrough.


BUT when I turn off HDR settings on the TV A 4k picture works through the receiver but with HDR disabled  so I get the following info in dxdiag.


Card name: Radeon RX 550 Series
Current Mode: 3840 x 2160 (32 bit) (60Hz)
HDR Support: Not Supported
Display Topology: Internal
Display Color Space: DXGI_COLOR_SPACE_RGB_FULL_G22_NONE_P709
Color Primaries: Red(0.641125,0.330578), Green(0.301281,0.601086), Blue(0.150891,0.061047), White Point(0.280773,0.290539)
Display Luminance: Min Luminance = 0.500000, Max Luminance = 270.000000, MaxFullFrameLuminance = 270.000000
Monitor Name: Generic PnP Monitor
Monitor Model: VSX-531
Monitor Id: PIO1037
Native Mode: 3840 x 2160(p) (30.000Hz)
Output Type: HDMI
Monitor Advanced Color Capabilities: Eotf2084Supported


I am thinking the problem is a HDCP handshake with the receiver when HDR is enabled on TV or  the receiver is not fully 4k HDR passthrough compliant as advertised. I don't know if I should get a HDCP 2.2 stripper or just replace the receiver ?



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3833 posts

Uber Geek


  #1971335 8-Mar-2018 17:13
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Maybe try another HDMI cable - I assume you are using an HDMI cable.

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3124 posts

Uber Geek

Lifetime subscriber

  #1971351 8-Mar-2018 17:56
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Check for firmware update on an receiver too?

578 posts

Ultimate Geek


  #1971361 8-Mar-2018 18:19
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Maybe the second HDMI cable isn't up to it.  Try repeating the direct connection test but using the cable you added for the 2nd test. I think the receiver is HDMI 2.0a so it should able to manage HDR.


1134 posts

Uber Geek

Lifetime subscriber

  #1971376 8-Mar-2018 19:28
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that page mentions HDR a couple times in the description but in video processing specs it doesn't mention HDR BT2020 etc just like DXDIAG is reporting






436 posts

Ultimate Geek

  #1971452 8-Mar-2018 22:29
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Ok changing the pixel format chroma subsampling  in AMD settings from YCbCr 4:4:4 to  4:2:0 has solved the problem. It is now working, so thats ruled out HDCP at points at a bandwidth issue at 4:4:4, which suggests 2 crap HDMI cables.embarassed 

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