Triple Head Setup

[Paladine]

Does anyone currently have Compiz-Fusion working with a triple head setup (2 displays on one graphics card and a 3rd on a second graphics card)?

I am about to add a 24" panel to my existing 2x 19" panel setup and desperately want to get CF working. I don't care if they are separate desktops on each display as opposed to Xinerama, so long as I can have CF working.

More details of what I would like to do are available on my Blog (http://blog.paladine.org.uk/?p=45)

Any help would be appreciated.

Paladine

[coz]

Hey guy,
how have you been :)
i have been searching online for this with little luck. I will ask in the channel if anyone is familiar with this type of set up if you are not able to get to #compiz-fusion.
The biggest issue will be if these are nvidia or ati cards.
coz

[maniac]

Does anyone currently have Compiz-Fusion working with a triple head setup (2 displays on one graphics card and a 3rd on a second graphics card)?

I am about to add a 24" panel to my existing 2x 19" panel setup and desperately want to get CF working. I don't care if they are separate desktops on each display as opposed to Xinerama, so long as I can have CF working.

A setup with three separate X screens should work fine. At least I don't know of any problems with that combination. It's easy to try it first with the two monitors you have, though - if it works fine with two screens, it will also work with three screens.


More details of what I would like to do are available on my Blog (http://blog.paladine.org.uk/?p=45)

This statement on your blog is wrong:
"The problem is that I can’t run Compiz-Fusion with this setup because it is not compatible with Xinerama".
Nvidia's drivers are broken for Xinerama+Composite, but I guess you know that already, right? ;)

[dimension128]

Using 4 monitors, 2 nvidia cards, I have compiz fusion working.
I just installed Ubuntu 7.10 and Im using the default compiz that comes with that.

I still dont have decorations on 3 of the monitors, and all but the last display respond slowly with menus and things.
Well, I ran emerald on each display, it worked for a while and then crashed.

Anyway here is my entire xorg.conf .

[phage]

I think you should be able to do it. You might not be able to drag windows between all of the displays but you can probably have everything else. I'm running 2 displays (with 1 nVidia card and xfce) in such a way that it should scale to as many displays as you'd like. Currently they are running as 2 screens instead of one but I'm about to test out TwinView to see if I like it as 1.

[enigma_0Z]

nVIdia + composite + xinerama is broken, but if you use TwinView to emulate Xinerama, it _should_ work...

In your various screen section in xorg.conf:


option "twinview" "1"
option "notwinviewxineramainfo" "false"


You could then add a metamode such as:


option "metamodes" "DFP-0: 1280x1024 +0+0, DFP-1: 1280x1024 +1280+0, DFP-2: 1280x1024 +2560+0"


That metamode would be three flat panels, left screen would be primary, middle secondary, right teritary.

With this config you _should_ get xinerama info w/o dealing with xinerama. That means that your desktop will see three physical displays, and you (with KDE anyway) will be able to have three wallpapers--one for each display.

[ulhume]

nVIdia + composite + xinerama is broken, but if you use TwinView to emulate Xinerama, it _should_ work...

It's working for 2 heads, not 3... At least with nVidia drivers you can't have xinerama and randr at the same time. And without randr no compiz. In fact not only compiz, but every composite manager I tried (event xcompmgr) are not working with 3 head setup.

[ulhume]

Using 4 monitors, 2 nvidia cards, I have compiz fusion working.
I just installed Ubuntu 7.10 and Im using the default compiz that comes with that.

I still dont have decorations on 3 of the monitors, and all but the last display respond slowly with menus and things.
Well, I ran emerald on each display, it worked for a while and then crashed.

Anyway here is my entire xorg.conf .
Yes but you are not using xinerama. So you can't move a window from one screen to another, can you ?

[Paladine]

Well thanks for the advice but I have decided to go with a dual system setup using synergy to allow me to use the same keyboard/mouse without a KVM switch. So I will have the 24" on one machine and the 2x 19" on the second machine. Then I can run cf with no problems as the machine with dual heads will be running twinview.

Paladine