HDR through a laptop with CAC-2504

Updated 2 days ago in USB Type C
14 on 10-03-2019

I have an Intel laptop with HD Graphics 620 (i7-7600U, 25.20.100.6577 Intel gfx driver), 3D-Club CAC-2504 (uses MegaChips – MCDP2900, to convert the USB-C to HDMI 2.0).
I also have Vizio P75-F1 with UHD color enabled, and Picture set to “Computer” (which enabled 4:4:4 mode)
When I connect the computer to the TV, Win10 detects the TV as HDR capable and I can enable it under Windows display properties.
I tried MPC-HC, PotPlayer-64 as well as Windows Movies & TV.
After enabling HDR in Windows, Windows Movies & TV produces better colors (I assume it’s using pixel mapping to switch to SDR). So does MPC-HC if I use MadVR with appropriate settings (such as passthrough HDR to display). I expected to be able to see HDR10 shown on Vizio while watching HDR content (local MKV files), however, I can’t seem to make that happen.

So it seems that the computer THINKS it has an HDR connection, but somehow the HDR metadata is getting lost in the CAC-2504.  I tried using RGB mode, YCbCr (in Intel control panel), 60Hz, 29Hz, 24Hz.  None seem to send the HDR data (through a CAC-2504).  I tried playing the same file through Vizio USB port as well as PLEX in Vizio and FireTV Stick 4K (newest one), and both produce HDR10 (however, they don’t give me Dolby Atmos…and that’s why I still need the computer to work)

Any suggestions? What am I missing?

 
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0 on 13-03-2019

Hello nhawk2,

thanks you for your question.

would you be so kind to provide me with the laptop brand and model number, then i am able to see what the specifics are with the particular model.

can you be a little more specific about the loss of metadata, im not really sure what you mean with it gets lost within the adapter?

hope to hear from you soon,

 

Kind regards

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0 on 14-03-2019

Dell Latitude 5285.
The TV shows when HDR10, Dolby Vision or HLG is active, but every mode with the laptop resulted in Normal (non-HDR) mode

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0 on 14-03-2019

Hello Nhawk2

Thank you for your reply,

as it seems your intel chipset should support HDR, but no where is mentioned that the output of the usb-c type port on your device support HDR as well. neither dell or any other sources mention this, so unfortunatly i am not able to give you a sound answer. HDR could be supported on your laptop screen but this does not mean necceraly that it can give that output by usb type-c. it is mentioned that the usb-c is 3.1 gen1 and has displayport but again nowhere it says what version of DP this would be. For HDR to work this output on usb-c should be a DP 1.4 port since i can not verify this i would advise you to contact Dell directly.

if you need any aditional assistance please leave me a message.

FYI

I have checked the following articles as a source.

https://www.dell.com/support/manuals/nl/nl/nlbsdt1/latitude-12-5285-2-in-1-laptop/latitude-12-5285-2-in-1-laptop_owners-manual/video-specifications?guid=guid-757d988a-6f63-466e-b6d7-de082934862e&lang=en-us

https://www.techadvisor.co.uk/review/laptops/dell-latitude-5285-2-in-1-review-3666311/

https://www.ghacks.net/2017/11/10/new-intel-graphics-driver-adds-hdr-streaming-support/

https://www.windowscentral.com/should-you-care-about-having-hdr-your-laptop

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1 on 14-03-2019

I don’t know if it’s DP 1.4, but I went by this article written by Intel, which claims that Win10 RS3, Intel 7th gen CPU with HD Graphics 620 and DP or HDMI connection (with proper adapter to HDMI, such as Club3D specifically named there) should be able to produce HDR output such as HDR10

https://www.intel.com/content/dam/support/us/en/documents/graphics/HDR_Intel_Graphics_TechWhitePaper.pdf

Can you review the article and let me know if I missed some requirement or need a different adapter?

on 14-03-2019

BTW, according to Intel article above, it states that DP 1.3 is needed for HDR, and that HD Graphics 620 and above support DP1.3

This section is also very useful:

Cable/dongle: For PCs with native HDMI or DP connector support, it is
straightforward to use an appropriate cable to connect to the display. In case of
PCs with USB Type-C port (with Thunderbolt 3 support or DP Alt mode), an
adapter or dongle is required to convert USB Type-C to HDMI2.0 or DisplayPort,
as well as to support HDCP2.2. Similar adapter is required for miniDP connector
too. Such adapters are available from 3rd party vendors such as Club3D*,
Belkin*, Uptab* etc.

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0 7 days ago

Hello Nhawk2,

Thank you for the fast reply.

I have contacted Dell directly, unfortunately they have just confirmed the dell latitude 5258 does not support HDR output due to a hardware restriction. neither is there a work around by a software update.

this is also the reason why they do not advertise it or mention it in the manual.

Sorry to be the bringer of bad news, hopefully this answers your question.

 

have a good weekend.

Kind regards

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0 6 days ago

When 5285 was released, HDR wasn’t really discussed (and Win didn’t support it) and thus Dell would have nothing in the specs that says whether HDR is supported or not.

Dell doesn’t implement some special pathways, etc.  That laptop comes with i7-7600U and HD Graphics 620, which according to Intel (who makes that hardware) DOES support HDR.  Furthermore, if HDR was NOT supported, then WIndows RS3 would NOT detect HDR capabilities for all 3 items (HDR video, HDR apps, WCG apps) like you see here (which 5285 did):

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1 6 days ago

Hello Nhawk2,

I understand your frustration, however if you would like some aditional information please contact Dell directly. I am not able to rule against the manufactorer and neither is intel in the end Dell makes the statements, hope you understand that. Dell clearly stated that there hardware does not support the HDR output. they are able to choose for that due to hardware setup.

Again i would urge you to contact Dell directly.

https://www.dell.com/support/incidents-online/us/en/19/contactus/dynamic?ref=contactus

in addition you could send a DX diagnose to [email protected] i am sure they will get back to you ASAP.

Kind regards.

 

6 days ago

I can tell you that when I ran DXdiag as well as DisplayHDR from the app store (DisplayHDRComplianceTests.exe), they both showed 10bit HDR capable setup…otherwise, Win 1809 wouldn’t say YES to HDR Video/Apps and WCG.

I have contacted Dell (higher level support that I have access to, than the one you listed)

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0 6 days ago

Hello Nhawk2

I am happy you are getting the support, dont forget to send [email protected] an email as well if you can. I have a feeling they will be very greatful for your input.

Have a great weekend.

Kind regards

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0 3 days ago
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1 3 days ago

Hello Nhawk2

Thanks for your reply, for more support please contact [email protected].

Kind regards

2 days ago

Already did, and pointed them to this thread.

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0 2 days ago

Hello Nhawk2,

thank you very much that is very supportive of you. this way we can keep each other informed and learn from one another.

kind regards

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