[Libdlo] Display Link Setup with Plugable UGA-2k-A

Thomas Siedlich thomas.siedlich at yahoo.com
Fri Sep 9 14:06:35 PDT 2011

Hi Jeff!

--- On Sat, 8/27/11, Jeff Hoogland <JeffHoogland at Linux.com> wrote:
> I've made some progress for any that
> may know where I should be headed next -
> When I configure the display link screen to be screen 0 it
> works fine, but I cannot access my internal display
> (laptop). When I configure my internal display to be screen
> 0 it works fine but I cannot access the display link screen.
> Any ideas? this is my xorg.conf: http://pastebin.com/yzm7WSaV

I had the same problem.

> On Sat, Aug 27, 2011
> at 3:23 PM, Jeff Hoogland <JeffHoogland at linux.com>
> wrote:
> I took the plunge and picked one of these up for my Linux
> box. I simply need a second working X server on my second
> display.

Do you really want two X server or one X server with two displays?
I think it's the last one isn't it?

> No matter which tutorials I follow though I cannot seem to
> get it to 
> work. I'm running on the 3.0 version of the Linux
> kernel 


> and I've install the display link xorg driver

Same here.

> and built and installed the latest libdlo.

I do not use libdlo.


You can try to configure your xorg.conf this way:

The display link screen section with DefaultDepth:
Section "Screen"
    Identifier      "DisplayLinkScreen"
    Device          "DisplayLinkDevice"
    Monitor         "DisplayLinkMonitor"
    DefaultDepth    16

The internal device section needs to have the Driver option
(Choose your driver instead of intel):
Section "Device"
    Identifier      "Configured Video Device"
    Driver          "intel"

The internal Screen section with the same DefaultDepth as above:
Section "Screen"
    Identifier      "Default Screen"
    Monitor         "Configured Monitor"
    Device          "Configured Video Device"
    DefaultDepth    16

And finally the ServerLayout section:
- Use Absolute coordinates for placement
- Turn on Xinerama
Section "ServerLayout"
    Identifier      "Server Layout"
    Screen  0       "Default Screen" Absolute 0 0
    Screen  1       "DisplayLinkScreen" Absolute 1366 0
    Option          "Xinerama"      "true"

The other sections seem OK.


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