Question: I have a DisplayLink-based external USB monitor, which has both power and data over USB, and seems to work perfectly under Windows 7, but only can display a text console under Ubuntu 10.10, and that I can only use when I am actually switched to it. So the only Use I can have so far is to have some text-based monitoring or console that I can watch while working on the graphic display. 

I know there are some development done for DisplayLink, but I never could get it to actually run properly. 

Yes, I tried the detailed setup described in other [posts](https://askubuntu.com/questions/3348/how-to-get-lilliput-usb-monitor-running-in-ubuntu), but they did not work, and instead crashed my X that I had to restore. 

Merci :-)

Answer: 
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. :-)
Here's an easy way to test if your DisplayLink device is operable at a low level, under Linux. If you plug in the device and get a green screen, you're ready for the next step.

First convert a bitmap to the size of your screen, then convert it to 16 bit RGB color. Then copy to the framebuffer for the device:

```
convert -resize '800x480!' input.jpg temp1.png
mkdfiff -f RGB16 temp1.png > temp2.png
dd if=temp2.png of=/dev/fb1

```

Note that your DisplayLink is probably at /dev/fb1, but you can check with `dmesg` :

```
[581145.816821] udlfb: DisplayLink Kensington M01063 - serial #202241900817
[581145.817000] udlfb: vendor descriptor length:22 data:22 5f 01 0020 05 00 01 03 00 04
[581145.817005] udlfb: DL chip limited to 2360000 pixel modes
[581145.909488] udlfb: DisplayLink USB device /dev/fb1 attached. 800x480 resolution.

```

Only version 1 DisplayLink chips are supported by Linux.
The DisplayLink 1 chips are limited to 16 bit RGB.
Getting the device to work properly under X windows is more challenging.