04-25-2021, 04:24 AM
When using Mobian, you can check for kernal messages with this command:
sudo dmesg
That might tell you what is the problem when you plug in the device. Also remember that you are using USB-C DisplayPort Alt Mode and it is your USB-C to HDMI cable which is doing the conversion to HDMI, so you are looking for error messages about DisplayPort in dmesg. You might want to verify that your cable is good or try it with a different cable.
sudo dmesg
That might tell you what is the problem when you plug in the device. Also remember that you are using USB-C DisplayPort Alt Mode and it is your USB-C to HDMI cable which is doing the conversion to HDMI, so you are looking for error messages about DisplayPort in dmesg. You might want to verify that your cable is good or try it with a different cable.