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triple_head_with_two_nvidia_cards_for_dualhead_twinview_main_screen_and_separate_status_display [02.02.2016 19:35]
Pascal Suter
triple_head_with_two_nvidia_cards_for_dualhead_twinview_main_screen_and_separate_status_display [21.03.2018 11:48] (current)
Pascal Suter [How i did it a few years later :)]
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   - it is up to you if you want to enable x2vnc only on demand or if you want it to be enabled whenever you are logged in.. if it should always be enabled ad the respective entry in the "​Session and Startup"​ dialog on your main seat.   - it is up to you if you want to enable x2vnc only on demand or if you want it to be enabled whenever you are logged in.. if it should always be enabled ad the respective entry in the "​Session and Startup"​ dialog on your main seat.
  
-===== How i did it a few years later :) =====+===== How i did it a few years later :) (2016) =====
 I recently got two new screens for my main display which lead to a new GPU as well, since my old nvidias didn't support the screens resolution. newer graphics cards often come with more than two outputs like my GeForce 750 with 2 DVI, 1 HDMI and 1 VGA port. I now connected the two main displays to the two DVI ports, and the old 19" display i still use as a status screen ot the VGA port. since i had some difficutlties in getting the 2-seat setup to work again on a single card i realized it is actually much simpler to just configure the card to run with two x-displays, one featuring the two main screens and the second display runs on the 19" status monitor. upon startup i start firefox with its own profile on the second display and it opens in full screen mode and shows my status display. it all looks like before, it is just a lot simpler to set up. and i must admit, i think this setup could also be possible with two separate cards installed, so you might want to try that first before following my steps below. ​ I recently got two new screens for my main display which lead to a new GPU as well, since my old nvidias didn't support the screens resolution. newer graphics cards often come with more than two outputs like my GeForce 750 with 2 DVI, 1 HDMI and 1 VGA port. I now connected the two main displays to the two DVI ports, and the old 19" display i still use as a status screen ot the VGA port. since i had some difficutlties in getting the 2-seat setup to work again on a single card i realized it is actually much simpler to just configure the card to run with two x-displays, one featuring the two main screens and the second display runs on the 19" status monitor. upon startup i start firefox with its own profile on the second display and it opens in full screen mode and shows my status display. it all looks like before, it is just a lot simpler to set up. and i must admit, i think this setup could also be possible with two separate cards installed, so you might want to try that first before following my steps below. ​
  
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 what's cool thoug about the 2 seat solution described above is, that you can regulate the settings (like screen saver, stand by etc.) completely autonomous for the status monitor and it even shows the status screen when the main screen is locked.. so this might still be a better solution for some situations.. for example when the status display is seen by more than just the user of the main screens. ​ what's cool thoug about the 2 seat solution described above is, that you can regulate the settings (like screen saver, stand by etc.) completely autonomous for the status monitor and it even shows the status screen when the main screen is locked.. so this might still be a better solution for some situations.. for example when the status display is seen by more than just the user of the main screens. ​
 +
 +===== Two years later, Gnome 3 (2018) =====
 +What I configured two years ago was essentially like running an X server on two screens without xinerama. I did that on Xfce. When i switched to Gnome 3 it turned out that Gnome 3 does not support that kind of Multihead anymore. Understandably so, because i think there is really not much use in this setup other than for what I use it for at the moment. So Xorg still shows the second screen, but it does not get a gnome shell, it's just another screen without a window manager running on it. 
 +
 +While we can run a firefox on an X server without a window Manager underneath it, it is a pain or even impossible to get it to run full screen. It will just use part of the screen and won't maximize to full screen. So the solution instead is, to run a second window manager (what xfce did anyway) on the second screen. Unfortunately gnome 3 does no longer seem to be happy running twice on the same system. And at the same time, all i want from that second window manager is to run a single application in full screen. ​
 +
 +So instead of Gnome 3 i use now Matchbox on the second screen. Matchbox has no problem starting up with gnome running in parallel and it is inteded to be used in a PDA-like manner, so every application runs full-screen by default - perfect for my application :) 
 +
 +so my startup script now looks like this: 
 +<code bash launchStatusdisplay.sh>​
 +#!/bin/bash
 +export DISPLAY=:​0.1 ​
 +matchbox-window-manager & 
 +firefox -P Statusdisplay
 +</​code>​