Windows 10: USB-C to DP not outputing any signal

I have Lenovo Legion 7i with USB-C 3.2 Gen 2 with Thunderbolt 4 but after connecting display to it, it doesn't show anything nor Windows recognize the display. Please help.

:)

 

How to force windows re-establish video signal output to either HDMI or DP connected monitor?

Hi,

The system set up is a Windows 10/11 PC with an external monitor connected through either HDMI or DP cable. I want to test a monitor driver feature which should trigger a new video signal output from Windows to the monitor. When I do it manually, I install the monitor driver, and unplug/plug HDMI/DP cable. Then the signal is re-established. Now I want to do it automatically and tried below ways.

1. Power off/on the monitor, controlled by smart plug. However, the signal from Windows keeps same as before uninstalling the driver. So it doesn't work.
   
2. Use pnputil to restart the GPU. It works, but not stable. I often see the whole system hangs when restarting GPU.
   

I think there must be a system event when HDMI/DP cable is plugged in, which force the video signal re-establishment. Or is there a way to mimic HDMI/DP cable plug in? Any idea?

Thanks,

Yan

 

Club 3D Intros USB 3.0 Type-C to DP Dual Monitor MST Hub

Eyy thank you for explaining this instead of shitposting. I wonder if we'll see something like this for desktops instead of using multiple GPUs.

 

Club 3D Intros USB 3.0 Type-C to DP Dual Monitor MST Hub

USB Type C for video is currently pretty exclusive to laptops due to how the port needs to be wired up to both GPUs display outputs as well as USB 2.0 and 3.1 connections. It's not like this is something that's routed through PCI-E. The only time that would mean anything for a desktop is if you had a GPU that provided display output via a USB Type C port but, just because it's USB Type C doesn't mean it has to output a DP or HDMI signal. I suspect that if a dGPU or iGPU on a desktop had this, it would be paired with a USB 3.1 controller.

With that said, I think we'll see this on iGPUs and laptops a lot faster than we'll see it on desktop dGPUs.