ubuntu-x-swat team mailing list archive

[James Robinson <591104@xxxxxxxxxxxxxxxxxx>]

Hi,

I have now fixed this problem for me.

Looking at what happens I believe the problem is the Xinerama is
designed for stitching multiple monitors together and so is not very
good at stitching together monitors which have already been stitched
together.

I will publish a full walk through once I've got it working fully on my
system (and not just the live CD) but it is fairly straightforward.

As I am sure you have seen elsewhere on the internet it is suggested
that you need to create a device for each port on your graphics cards
and give the devices the same BusId (but different identifiers) and then
andd the Screen 0 and Screen 1 options to differentiate between the
ports.

I have found that this doesn't quite work. You also need to add

Option          "ZaphodHeads" "name of port" #e.g. DVI-0, DVI-1, DVI-2,
VGA-0, VDA-1 etc

Then it should work fine.

A copy of my fully working xorg.conf file is available at

http://www.etothepii.co.uk/xorg.conf

What this does (which you will see if you leave xinerma off) is allow
the creation of completely seperate X sessions. So in my configuration
with xinerama off I get 4 seperate x sessions each of which is capable
of having the mouse in it but between which windows can not be dragged.

As a consequence when you enable Xinerama it is only being asked to
stitch single monitors together and so works fine.

-- 
wrong xinerama scroll/pan using two cards three monitors
https://bugs.launchpad.net/bugs/591104
You received this bug notification because you are a member of Ubuntu-X,
which is subscribed to xorg in ubuntu.