Can't enable HDR

[WalidCVision]

Hello,

I have latest Duo 1.5.9 PRO version.
Windows 11 is 25H2 version.

On my client, I already enabled HDR in Moonlight.
But I get only HEVC 10-Bit SDR.
My monitors that are connected to my PC do not have HDR support. Does that matter?

I tried Sunshine + VDD (virtual monitor driver) without Duo, and I am able to get HDR.
But with Duo, I can't, only 10-bit SDR.

Any ideas why? I have an RTX 4060 TI and it is recognized by Duo.

[WalidCVision]

Some additional information:

• I've already tried new instance + new windows user
• Looking into Windows Events -> Applications, I can see events by "DuoIdd" saying "Changing 's display to 1920x1080@60 (HDR)"
• Looking at dxdiag (run from moonlight remote desktop session), it gives me some information for the "Microsoft Remote Display Adapter":
  • Current Mode: 1920 x 1080 (32 bit) (60Hz)
  • HDR Support: Supported
  • Display Color Space: DXGI_COLOR_SPACE_RGB_FULL_G22_NONE_P709
  • Monitor Capabilities: HDR Supported (BT2020RGB Eotf2084Supported )
  • Display Pixel Format: DISPLAYCONFIG_PIXELFORMAT_32BPP
  • Active Color Mode: DISPLAYCONFIG_ADVANCED_COLOR_MODE_SDR
  • Driver Name: c:\windows\system32\driverstore\filerepository\rdpidd.inf_amd64_e766072a51d651dd\rdpidd.dll,c:\windows\system32\drivers\wudfrd.sys
  • Driver Version: 10.0.26100.8737

So to me it looks like Moonlight + my TV where the remote session is running does support HDR (as I said, with Sunshine + VDD I had HDR working successfully).

Any other suggestions what to check?

[WalidCVision]

Fyi: Version 1.6.0 did not resolve the issue. I had disabled Memory integrity, still no success.

[tankcom]

I have the same issue.

Windows 25h2, RTX5080 and tried on a windows, linux and ios moonlight client. It always launches with 10bit sdr if I enable hdr in the moonlight settings. If I disable hdr it start without the 10 bit label in the connection info.
Tried with AV1 and hevc.

Did you find a fix?