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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, but they did not work, and instead crashed my X that I had to restore.

Merci :-)

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Can you give us the name of your monitor? (manuf. and model) –  Nathan Osman Oct 14 '10 at 21:14
    
Mine s the iMo USB Sub-Monitor, as sold at ThinkGeek.com / The Model is actually the XT-7, as I can see on the CDROM. –  jfmessier Oct 15 '10 at 17:53
    
Which laptop/computer and graphics card do you have? I have an HP dv7 4183cl, and am trying to setup a triple head using 1 displaylink monitor. –  user12046 Mar 8 '11 at 22:17
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2 Answers

up vote 4 down vote accepted

Maybe this get's you a little bit further: http://ubuntuforums.org/showthread.php?t=1597230

General DisplayLinkAdapter-Information for Linux is available at http://libdlo.freedesktop.org/wiki/DeviceQuirks

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

Good Luck

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Lots of useful links. Will take me some time to read it all and setup, but I htink I"m in the right way to get it working. –  jfmessier Nov 6 '10 at 13:00
    
@jfmessier, did you get it working? –  Thorbjørn Ravn Andersen Feb 27 '11 at 8:28
    
Not yet. All I can get so far is a graphical display, but then the other monitors are black, useless. I still have to merge the configuration files together. My existing xorg.conf file is empty, and if I put the config file for the DisplayLink, it disables everything. So I need to generate the xorg.conf file for my existing monitors and then figure out how to append the DisplayLink stuff in it. BTW: I now have an ATI-based dual-monitor display, while I used to only connect to the on-board Intel-based adapter. –  jfmessier Mar 7 '11 at 19:52
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I see it's been a while since this was updated. Would you mind telling me whether DisplayLink USB monitors work well for you with current software? –  Ken Jun 4 '12 at 18:55
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@Ken, they work out of the box only on Linux 3.9 and later which ships in Saucy Salamander. –  Shnatsel Aug 29 '13 at 0:39
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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.

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