Same issue here. Please find the core dump from DisplayLinkManager. Uncompressed size is 2.4GB.
https://ferdi.naasa.net/oc/index.php/s/PX1lFi2sZFmNkqS
Additionally I'm getting logged off when I plug in the D3100 for the first time, I've two mouse cursors - one static and one which is flickering.
When the D3100 is attached during system startup, the secondary screen stays black and I've a couple of kernel stacktraces in the journal. Looks like these:
https://github.com/DisplayLink/evdi/issues/28