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: 
Maybe [this](http://ubuntuforums.org/showthread.php?t=1597230) will get you a little bit further.

General DisplayLink adapter information for Linux is available [here](http://libdlo.freedesktop.org/wiki/DeviceQuirks).

Also, if your primary graphics adapter is from NVIDIA, you should read [this](https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-displaylink/+bug/629244).

Good Luck
In addition to callmebob's installtion guide on 18.04 I had to do the following routine:
Workaround 1: Disable PageFlip for modesetting

It is preferred to keep using "modesetting" driver, but disabling page flipping is necessary. 
To do this, as a root user create a file 20-displaylink.conf under:

/usr/share/X11/xorg.conf.d/

with the following content: 

```
Section "Device"
  Identifier "DisplayLink"
  Driver "modesetting"
  Option "PageFlip" "false"
EndSection  

```

A reboot is required for the setting to be effective.