I struggled for a bit to get my UD-3900 working under Ubuntu MATE 16.04.2. Here are the steps I took:
1) Ensure that the kernel is AT LEAST 4.8 by running
uname -r. I tried to downgrade my kernel to 4.4 after failing a few times to no avail.
2) Update your system.
sudo apt-get update and
sudo apt-get dist-upgrade
4) If you haven’t already, install dkms
sudo apt-get install dkms
chmod a+x displaylink-driver-xxxx
Paste this into that file:
Section "Device" Identifier "Intel Graphics" Driver "intel" EndSection
After a reboot, I had to wait 50 seconds before Ubuntu recognized the screens. If something went wrong, you can uninstall the driver
sudo displaylink-installer uninstall
lsusb to see if the driver is installed or not.
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