Not All my monitors show up in DisplayLink
 

Hi there,
I've connected three monitors to my Mac Pro M!, but I can only see two in DisplayLink:

As you can see by the image attached, the Acer ET322QK is not showinf up (the S22B300 is the little sliver you see in the Displays window).

Any idea how I can make it show up?

I'm using a Dell Universal Dock UD22 to connect the monitors to the laptop.

The real reason I'm asking, it's because I'm trying to connect a fourth monitor with the USB-C Thunderbolt on the UD22 but I don't seem to make it show up in the M! at all. I was only able to set it up as mirror of one of the others, but again, it doesn't show up in the DisplayLink interface. I only always see only two in it.

Any pointers would be appreciated.

Thanks!

Only the DisplayPort output ports on the back of the UD22 are powered by DisplayLink technology. The only monitors that will be shown within the DisplayLink Manager Application status window are the monitors connected to the DisplayPort video outputs.

The HDMI output port and the USB Type-C output are driven by a different technology known as DisplayPort Multi-Stream Transport (aka DP MST). Macs do not support DP MST, which is why your display was mirrored.

There is no workaround for this behavior.