3 Monitors: 2 sharing 1 screen and the 3rd on a separate?

venustomars · n00b Joined: 22 Sep 2008 Posts: 24

I have 2 LCDs and 1 TV, connected with an nVidia and Intel onboard card. For a variety of reasons I prefer the TV and 1 of the monitors connected to the nVidia card and the 2nd monitor on the intel card.

Due to some fullscreen issues, I would like the TV to be on a separate screen from the 2 LCDs. Currently I'm only able to figure out how to have them all on one screen or all separate using xinerama:

Jaglover · Posted: Thu Aug 01, 2013 10:31 pm Post subject:

You could run anther instance of Xorg for TV.
I have similar setup myself, only I'm using two nVidia outputs for three displays, having DVI to DVI+HDMI splitter to send signal to the TV. To avoid confusion from two EDID read from a single output I load EDID from a binary file instead (AFAIK EDID cannot be disabled with blob driver).
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venustomars · n00b Joined: 22 Sep 2008 Posts: 24

Knute · Guru Joined: 28 Jun 2004 Posts: 362 Location: Fargo, ND

Ok, how I would set it up, is to get the one lcd monitor and tv working the way that you want with nvidia-settings.

Once you have those set up the way that you want, write the config settings to a file. Then, copy that file to /etc/X11/xorg.conf, and set up your other lcd monitor on the intel card. I suggest copying it, just incase you foobar what you set up with nvidia-settings. It's always easier to copy the untouched file over than to try to recreate it.

Also, as you are playing with X-settings, I would suggest that you turn off any display managers that you have running (xdm, kdm, gdm, slim, etc) as, if something goes haywire, you can fall back to the console alot easier if they aren't running. Then you can make additional changes to the xorg.conf file and try it again with startx.

I know I didn't post code, but I hope I helped.
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Knute
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The human race has one really effective weapon, and that is laughter.
-- Mark Twain

If you want proof of that, take a look at windows sometime.

venustomars · n00b Joined: 22 Sep 2008 Posts: 24

Knute · Guru Joined: 28 Jun 2004 Posts: 362 Location: Fargo, ND

After you set up the tv and monitor with nvidia-settings, you can save that configuration to a file, and then modify that file to add the intel card and 2nd lcd monitor.

Does that make sense?
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Knute
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The human race has one really effective weapon, and that is laughter.
-- Mark Twain

If you want proof of that, take a look at windows sometime.

venustomars · n00b Joined: 22 Sep 2008 Posts: 24

I understand how to create an xorg.conf with screens for all 3 devices. How do I then join the 2 LCDs onto one screen while leaving the TV on a separate screen? Perhaps I am misunderstanding you.

Knute · Guru Joined: 28 Jun 2004 Posts: 362 Location: Fargo, ND

Well, that may take some toying around with.

I don't think that the nvidia-settings can do that itself.

Xinerama might be able to do it, but I'm not sure. There may be xrandr settings that could do it as well, but that's just a guess. Sorry I can't be more helpful on that part of it.
_________________
Knute
----------
The human race has one really effective weapon, and that is laughter.
-- Mark Twain

If you want proof of that, take a look at windows sometime.

venustomars · n00b Joined: 22 Sep 2008 Posts: 24

In an attempt to use xrandr, I have an xorg.conf with 3 separate screens, no xinerama. When I try to join the two LCDs, using a command like "xrandr --auto --output DVI-0 --mode 1440x900 --right-of DVI-1", I can't join the two monitors since they don't appear in one "xrandr -q"

"xrandr -q" on nVidia DVI: