On Aug 3, 2015, Displaylink finally released the USB Monitor driver for Ubuntu.
Link: http://www.displaylink.com/downloads/ubuntu.php
I have an AOC usb monitor and Ubuntu 14.04. After installing the driver, my usb Monitor start working.
If the driver works for your monitor, please let other people know by posting it. Many people waiting for this driver. I've been waiting for 2 years. :-)
This may help you get it going.
Displaylink Doublesight DS-90U monitor working
1) Install dependencies required to build displaylink X server...
apt-get install xinit xserver-xorg xserver-xorg-dev xfonts-base libusb-dev xorg-dev git-core build-essential
2) Downloaded and fixed source for xserver-xorg-video-displaylink from Launchpad and extract the source code.
tar xvfz xserver-xorg-video-displaylink_0.3.orig.tar.gz
cd xf86-video-displaylink
Edit src/displaylink.c
#graphical
gedit src/displaylink.c
#command line
nano src/displaylink.c
comment (add a # to the front) out the following lines...
//#include "xf86Resources.h"
//#include "xf86RAC.h"
// pScrn->racMemFlags = RAC_FB | RAC_COLORMAP | RAC_CURSOR | RAC_VIEWPORT;
// pScrn->racIoFlags = RAC_FB | RAC_COLORMAP | RAC_CURSOR | RAC_VIEWPORT;
// xf86CrtcScreenInit (pScreen);`
3) build and install
./configure && make && make install
sudo cp /usr/local/lib/xorg/modules/drivers/displaylink_drv.so /usr/lib/xorg/modules/drivers/
4) create /etc/X11/xorg.conf
Section "ServerLayout"
Identifier "X.org Configured"
Screen 0 "DisplayLinkScreen" 0 0
EndSection
Section "Device"
Identifier "DisplayLinkDevice"
Driver "displaylink"
Option "fbdev" "/dev/fb0"
EndSection
Section "Monitor"
Identifier "DisplayLinkMonitor"
# DS-90U is 1024x600 9-inch monitor - remove or change the DisplaySize for other devices
DisplaySize 190 115
EndSection
Section "Screen"
Identifier "DisplayLinkScreen"
Device "DisplayLinkDevice"
Monitor "DisplayLinkMonitor"
EndSection
5) Plug in the Displaylink monitor into a USB port (screen should go green)
6) Reboot or restart X
source
instructions
Best Answer
You will need to install the xserver-xorg-video-displaylink package to get support for this class of devices (identifiable by connecting via USB and presenting a green screen on successful initialisation). The X server does not currently support hotplug events on the USB bus, so you will need to create an xorg.conf file to use such a device. An example xorg.conf file is included in the package (under /usr/share/doc/xserver-xorg-video-displaylink/examples).
If the above is not working for you, please file a bug against xserver-xorg-video-displaylink: there may be some variation between displaylink devices, which may not be handled completely by the existing driver (but any such lack of support is a bug to be fixed, rather than a result of user error).