ubuntu-x-swat team mailing list archive

[Kat Amsterdam <812594@xxxxxxxxxxxxxxxxxx>]

Warning the DisplayLink driver is dependent on reading the EDID
(Extended display identification data) from the Monitor. If the monitor
does not supply this, then (as in my case) everything you try will fail.


This a partial workaround works for a single display:

1. make sure the displaylink driver is installed

sudo apt-get install xserver-xorg-video-displaylink

2. Put the following into the file
/usr/share/X11/xorg.conf.d/52-displaylink.conf (please have a look at
the Notes below as well)

Section "Device" 
Identifier "DisplayLinkDevice" 
driver "displaylink" 
Option "fbdev" "/dev/fb0"    # or /dev/fb1 depending on the results of dmesg | grep DisplayLink
EndSection 

### 
Section "Monitor" 
Identifier "DisplayLinkMonitor" 
EndSection 

Section "Screen" 
Identifier "DisplayLinkScreen" 
Device "DisplayLinkDevice" 
Monitor "DisplayLinkMonitor" 
SubSection "Display" 
Depth 16 
Modes "1024x768" 
EndSubSection 
EndSection 

3. Add the following to /etc/gdm/Init/Default above the "exit 0" at the
end of the file:

### set display for attached USB devices

XRANDR=`gdmwhich xrandr` 
if [ "x$XRANDR" != "x" ] ; then 
$XRANDR -o 0 
fi 

4. stop X

sudo stop gdm

5. Test out before restarting gdm:

sudo startx

At this point, you should see at least a mouse cursor that you can move
around, and possibly the Unity 2D fallback interface, in case you're
using Natty.

6. If the desktop apepars and is usable, you should be able to now start
gdm and have a login screen:

sudo start gdm

-- 
You received this bug notification because you are a member of Ubuntu-X,
which is subscribed to xserver-xorg-video-displaylink in Ubuntu.
https://bugs.launchpad.net/bugs/812594

Title:
  HP USB Graphics Adapter (Displaylink) shows green screen

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