This is, roughly speaking, my experience on Ubuntu 16.04 (kernel 4.4). Initially my system went into low graphics mode whenever I plugged in the DL monitor. This stopped once I altered 20-displaylink.conf to use the "Intel" driver, but that instead caused the system to crash whenever I plugged in the monitor or clicked "Detect Displays" or opened Chrome or looked at it too hard. This is my current 20-displaylink.conf (which is based on a working setup from another user on this forum).
Code:
Section "Device"
Identifier "Intel Graphics"
Driver "Intel"
Option "AccelMethod" "sna"
Option "TearFree" "true"
Option "TripleBuffer" "true"
Option "MigrationHeuristic" "greedy"
Option "Tiling" "true"
Option "Pageflip" "true"
Option "ExaNoComposite" "false"
Option "Tiling" "true"
Option "Pageflip" "true"
EndSection
This eliminated the crashes, though X still gives me a load of crash reports on startup and the screen still isn't being detected anyway.
Attached is my system's output from the Displaylink Linux Support Tool. Any pointers would be greatly appreciated.