Custom Resolution Utility (CRU)

[peterjcat]

Hi everyone

Wondered if anyone could help me. I have 4K HDR working with Intel 630 graphics when connecting directly to my TV (LG 950), but not when I go through my AVR (Yamaha RXV-2079) -- when I go through the AVR, there is no HDR option in Displays settings (as there is when I go straight to the TV). The AVR has HDMI 2.0a, HDCP 2.2 and can pass 4K HDR through all other sources. (It is set to Mode 1 also.)

So, I think it may be that the AVR is not passing through all of the EDID information it needs to. Here is my dxdiag report for direct connection to the TV (HDR available but not currently selected):

Code:

Card name: Intel(R) UHD Graphics 630
        Manufacturer: Intel Corporation
           Chip type: Intel(R) UHD Graphics Family
            DAC type: Internal
         Device Type: Full Device
          Device Key: Enum\PCI\VEN_8086&DEV_3E92&SUBSYS_D0001458&REV_00
       Device Status: 0180200A [DN_DRIVER_LOADED|DN_STARTED|DN_DISABLEABLE|DN_NT_ENUMERATOR|DN_NT_DRIVER]
Device Problem Code: No Problem
Driver Problem Code: Unknown
      Display Memory: 4146 MB
    Dedicated Memory: 128 MB
       Shared Memory: 4018 MB
        Current Mode: 3840 x 2160 (32 bit) (60Hz)
         HDR Support: Supported
    Display Topology: Internal
Display Color Space: DXGI_COLOR_SPACE_RGB_FULL_G22_NONE_P709
     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: LG TV
          Monitor Id: GSM0001
         Native Mode: 3840 x 2160(p) (60.000Hz)
         Output Type: Displayport External
*** Monitor Advanced Color Capabilities: BT2020RGB BT2020YCC Eotf2084Supported AdvancedColorSupported ***

...and here is the dxdiag report for the AVR (HDR not available):

Code:

Card name: Intel(R) UHD Graphics 630
        Manufacturer: Intel Corporation
           Chip type: Intel(R) UHD Graphics Family
            DAC type: Internal
         Device Type: Full Device
          Device Key: Enum\PCI\VEN_8086&DEV_3E92&SUBSYS_D0001458&REV_00
       Device Status: 0180200A [DN_DRIVER_LOADED|DN_STARTED|DN_DISABLEABLE|DN_NT_ENUMERATOR|DN_NT_DRIVER]
Device Problem Code: No Problem
Driver Problem Code: Unknown
      Display Memory: 4146 MB
    Dedicated Memory: 128 MB
       Shared Memory: 4018 MB
        Current Mode: 3840 x 2160 (32 bit) (59Hz)
         HDR Support: Supported
    Display Topology: Internal
Display Color Space: DXGI_COLOR_SPACE_RGB_FULL_G22_NONE_P709
     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 = 0.500000, Max Luminance = 270.000000, MaxFullFrameLuminance = 270.000000  ***
        Monitor Name: Generic PnP Monitor
       Monitor Model: RX-V2079
          Monitor Id: YMH31BF
         Native Mode: 1920 x 1080(p) (60.000Hz)
         Output Type: Displayport External
*** Monitor Advanced Color Capabilities: BT2020RGB BT2020YCC Eotf2084Supported ***

Thanks to CRU I was able to add BT2020RGB BT2020YCC to the Monitor Advanced Color Capabilities, but it is still missing AdvancedColorSupported which I think is why I'm still not getting the HDR option.

I wondered whether this had something to do with the Display Luminance settings, which show higher minimum and much lower maximum (ie less dynamic range) on the AVR compared to the TV.

So I wondered first whether there was any way to adjust the Display Luminance settings using CRU? These are apparently stored in the EDID or an override according to the Windows documentation. But I don't know whether CRU can address these (or even if that is the issue).

Any insights gratefully appreciated!