Download the latest driver from https://www.synaptics.com/products/displaylink-graphics/downloads/ubuntu.
Note that your DisplayLink device/dock needs to be unplugged before installing.
# find the download link
link=`curl -fsSL 'https://www.synaptics.com/products/displaylink-graphics/downloads/ubuntu-5.4.1?filetype=exe' | grep exe_files | grep -oP 'href="\K[^"]+'`
echo Downloading driver from https://www.synaptics.com$link
# download to home
mkdir -p ~/displaylink
cd ~/displaylink
curl -fsSLo displaylink.zip https://www.synaptics.com$link
# prepare executable
unzip displaylink.zip
mv displaylink-driver-*.run displaylink.run
chmod +x displaylink.run
# install
sudo ./displaylink.run
If you see the warning WARNING: Version x.x.x of EVDI kernel module is already running., just need to unstall the driver and reboot before installing again.
sudo ./displaylink.run -- uninstall
sudo reboot