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Phr00t

DisplayPort over USB-C Alt Mode: issues, need help

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I'm having trouble using my Vive Cosmos on my laptop. My laptop has two DisplayPort connectors. One is a DisplayPort 1.2 connector that goes to the Intel HD card (since Cosmos setup complains that I need to plug it into the *other* DisplayPort for my NVIDIA card when trying to use it). My other DisplayPort connector is actually a USB-C port with an Alt Mode DisplayPort 1.3. It has a DP icon on the USB-C port, confirming it supports video output. I got a USB-C to DisplayPort adapter, which I plugged the Cosmos link box cable into.

Cosmos then gives me an error, 201: Headset display not detected. I was able to update the firmware, and it does say it tries to restart the device... but I keep getting a 201 headset display not connected error, telling me to check my cables.

I'm using the latest NVIDIA drivers for my RTX 2060. Please help and thank you!
 

@Synthesis

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It appears DisplayPort 1.2 runs @ 17.28GBPS, so you will need a cable or adapter that supports at least that speed. Many only support 5.4GBPS, which is the likely cause of this problem. I haven't confirmed this and still hoping technical support can chime in. This is the cable I have coming in tomorrow, which will hopefully work:

https://www.amazon.com/gp/product/B07H8BHZPN/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1

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@Phr00t Thanks for detailing your troubleshooting process. This is awesome and helpful for the community members that may experience this issue. Keep us posted on what you find with your new cable. 

I know you've already found which DisplayPort that's dedicated to your GPU, but for those that need help identifying this, you can follow these quick steps:

Right click desktop > Nvidia Control Panel > Set PhysX Configuration

image.jpeg.abe6025032277e7330589955e81fc4f7.jpeg

Shoutout to @Caesar T for this tip!

 

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