What are possible sources of error when connecting USB-C to Displayport? I recently asked the question of how to bring a connected PC out of "sleep" and noticed that the problem does not always occur. Now I have found out that it probably does not have anything to do with the sleep mode or similar. Rather, the connection from USB-C to Displayport (via a corresponding cable without an additional adapter) seems to be prone to errors. When I start my notebook in the closed state (power button is attached to the side), the notebook starts, the external camera even shows that it is trying to recognise me via Windows Hello, so the notebook has already started, but the picture does not come. What could be the reason for this? Could it be the cable? Would an adapter be better?
About the folded notebook: I would select "Do nothing" in the power settings when it is closed. This is because "Save energy" is usually set there. That may have an influence.
The other thing about USB-C video output.
Here you have to know that the video control is managed by the iGPU alone. If there is an additional graphics card in the notebook, it only displays the image in the video memory of the iGPU (Nvidia Optimus). Therefore, update the iGPU driver.
The BIOS can also influence the functions of the USB-C port. So also update the BIOS.
The BIOS may also have settings for how the Thunderbolt port should behave.
Then there are different chipsets that can be used in these USB-C to DP cables. As well as in the adapters. That can also have an influence. Here, for example, is an expensive Delock cable with an Atmel chipset:
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https://www.delock.de/produkte...Delock DisplayPort - USB Type C (2 m, USB Type C, DisplayPort)
