If you want to send a display signal from your computer to a pen display via a USB-C cable, then the ports and cables need to support DP alt mode (DisplayPort Alternative Mode).
NOT ALL USB-C PORTS OR CABLES SUPPORT DP ALT MODE.
Support for DP alt mode is something you must verify for your ports and your cables. Sometimes this is not straightforward to do. You will find multiple techniques described below.
The DisplayPort symbol indicates the cable or port supports DP alt mode. Unfortunately many cables that DO support DP alt mode, do not have this logo.
The Thunderbolt symbol indicates a cable or port supports DP-alt mode.
Here is an example of two USB-C ports with the Thnderbolt symbol
Here is an example of a cable with a Thunderbolt symbol.
Unfortunately, many USB-C thunderbolt ports and cables simply do not have the thunderbolt logo on them.
If your cable or port, does not support DP alt mode, you have several remaining strategies:
Read the documentation. Look for for the words "Thunderbolt" of "DP alt mode". Sometimes the documentation will say something more ambiguous like "supports display".
Contact product support from your manufacturer. Just ask them!
Reach out to an online community and ask if anyone has been able to use that port in their tablet to receive a display signal.
You have to verify DP support for the USB-C port AND the USB-C cable. Just having one support DP alt mode is not enough.
DP alt mode has nothing to do with whether the port or cable can carry power or carry enough power. That is a separate issue.
