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Multiple Monitors - xrandr error

Discussion in 'X.Org' started by QuinRiva, Feb 2, 2010.

  1. QuinRiva

    QuinRiva New Member

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    I'm trying to set up multiple monitors, at the moment I have two monitors working in clone mode, the other two monitors on my second video card are not on at all.

    Running the command:

    Code:
    xrandr --output DVI0 --auto --right-of VGA2
    results in the error screen cannot be larger than 1920x1920.

    I have already configure a "Virtual parameter" in the xorg.conf file, such that my Screen0 section is:

    Code:
    Section "Screen"
        Identifier     "Screen0"
        Device         "Card0"
        Monitor        "Monitor0"
        SubSection     "Display"
            Viewport    0 0
        EndSubSection
        SubSection     "Display"
            Viewport    0 0
            Depth       4
        EndSubSection
        SubSection     "Display"
            Viewport    0 0
            Depth       8
        EndSubSection
        SubSection     "Display"
            Viewport    0 0
            Depth       15
        EndSubSection
        SubSection     "Display"
            Viewport    0 0
            Depth       16
        EndSubSection
        SubSection     "Display"
            Viewport    0 0
            Depth       24
            Virtual     3840 1200
        EndSubSection
    EndSection
    I'm running 8.0-Release and the video card(s) are an 8800GTS-512 and a 7950GT.

    Xorg.conf list the second video card, but doesn't list the screens attached to it.

    I've also tried using Kdrandr with no luck (doesn't appear to be any way to change from clone mode). Also the Multiple Monitors setting under Display Settings tell me that I do not appear to have a multiple monitor configuration.

    Any idea how I can get all four of my monitors up and running?

    Full xorg.conf file has been attached (renamed to .txt).
     

    Attached Files:

  2. QuinRiva

    QuinRiva New Member

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    Oh the Xorg.0.log file notes the error:
    (EE) NV(0): Virtual size (3840x1200) (pitch 3840) exceeds video memory

    I'm not sure if that helps.

    Sorry about the double post, I can't seem to figure out how to edit a post.
     
  3. DutchDaemon

    DutchDaemon Administrator Staff Member Administrator Moderator

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    Pointer: it's a Frequently Asked Question.
     
  4. zzsql

    zzsql New Member

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    Associated question here. Can X operate without an /etc/X11/xorg.conf?

    I ask because I built a nice Dell E6510 laptop with dual monitors.

    X mirrors the same screen output to both monitors (I'm working on fixing that. Xrandr is probably the answer)
    Problem is, I find no /etc/X11/xorg.conf yet X runs like a dream.

    What am I seeing here?
     
  5. SirDice

    SirDice Moderator Staff Member Moderator

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    Yes, it usually auto-detects the needed drivers and uses the default options.
     
  6. zzsql

    zzsql New Member

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    Alright. Suppose I want to have an Xorg so I can manipulate dual monitors with xrandr, if I create an xorg.conf, which takes precedence? I'd guess the xorg.conf would be used.

    Man, I really admire the unix powers you guys have. I'm working on building mine up with these projects. (And maybe a cert for base-level knowledge and study).

    Thanks,
    Greg
     
  7. trh411

    trh411 New Member

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    Just out of curiosity, you say you have two monitors working. On which card are the two working monitors plugged? I recognize the 8800 GTS as an Nvidia, is the other an ATI-Radeon?

    Please post your entire xorg.conf file and Xorg.0.log. Use pastebin.com and provide links if needed.
     
  8. SirDice

    SirDice Moderator Staff Member Moderator

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    trh411, thread got revived. You're responding to a post from 2010.