[RESOLVED] USB-C Monitor Support

Hi folks,

Wondering if anyone has any advice or got this working.

Ubuntu 22.04, with latest updates.
USB-C expansion cards (x2)
HDMI expansion card

I bought myself an USB-C portable monitor (https://www.amazon.co.uk/dp/B093GCL18V) and when I plug in the USB-C it lights up, but no matter which input I select (it has 2x USB-C and a mini-HDMI), neither lsusb nor xrandr pick up the additional monitor.
It’s only when I plug it in via HDMI cable that it shows up in xrandr.

I’ve used the USB-C with docking stations and the HDMI with other monitors, so I know it all works individually.

I had expected that by plugging it into USB port 1 on the monitor (which has thunderbolt) it would work with the thunderbolt in the usb-c expansion cards, however it seems it only gets power from the USB-C.

I am not sure if this is an OS or an firmware issue on the laptop, or on the screen itself.

Any suggestions?



Tried a different usbC data cable?


Do you know, I thought I had, but as soon as I did - poof! There it was!
Thank you - I always forget not all USB-C cables are created equal! :blush:

For the benefit of anyone else, this is what it looks like;

DP-4 connected (normal left inverted right x axis y axis)
   1920x1080     60.00 +  60.00    50.00    59.94    30.00    25.00    24.00    29.97    23.98  
   1600x900      60.00  
   1280x1024     60.02  
   1152x864      59.97  
   1280x720      60.00    50.00    59.94  
   1024x768      60.00  
   800x600       60.32  
   640x480       60.00    59.94  
$ xrandr --output DP-4 --mode 1920x1080 --right-of eDP-1

New cable for the win! Marking resolved.