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help with multihead setup in xorg with radeon

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  • help with multihead setup in xorg with radeon

    hi guyz, i have a radeon 4850x2 ehich have 4 dvi connectors, is possible to use 1 monitor per GPU (both same rez) without xinerama?

  • #2
    Xinerama wouldn't come into play when two monitors are on two GPUs. You'll have 1 xserver running per GPU.

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    • #3
      mmm ok, i had that idea too, let me try to force kdm to initialize both xservers

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      • #4
        You don't need to run two xservers for that, you can just run one xserver with 2 separate screens.

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        • #5
          Originally posted by monraaf View Post
          You don't need to run two xservers for that, you can just run one xserver with 2 separate screens.
          TWO GPUs!!!!

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          • #6
            Yes no problem. I'm using two different GPUs with one xserver myself, works fine.

            Code:
            $ glxinfo 2>/dev/null|grep renderer
            OpenGL renderer string: Mesa DRI R600 (JUNIPER 68BE) 20090101  TCL DRI2
            OpenGL renderer string: Mesa DRI R600 (RS780 9610) 20090101  TCL DRI2

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            • #7
              Right... count the number of Xorg processes you have running.

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              • #8
                Don't be stubborn. Like I said I have only one xserver running with two separate screens.

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                • #9
                  Originally posted by monraaf View Post
                  Yes no problem. I'm using two different GPUs with one xserver myself, works fine.

                  Code:
                  $ glxinfo 2>/dev/null|grep renderer
                  OpenGL renderer string: Mesa DRI R600 (JUNIPER 68BE) 20090101  TCL DRI2
                  OpenGL renderer string: Mesa DRI R600 (RS780 9610) 20090101  TCL DRI2
                  nice, can you explain me how to try that configuration? i tried many methods but i couldn't get it like that

                  plz

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                  • #10
                    I think what monraaf did was to create two Device and Screen sections in his xorg.conf, then join them with Xinerama.

                    If you want a big desktop with the ability to drag windows between screens, you need Xinerama if you have multiple GPUs.

                    You could also configure both as a single X server without Xinerama, using a single mouse/keyboard, but without the ability to drag windows across screen boundaries.

                    The third option is to configure two separate X servers, needing a separate mouse/keyboard for each and some multiseat hackery so they don't fight over the active VT.


                    You could forfeit one GPU and attach both monitors to the other; then you'd have a big desktop without Xinerama. For 2d and compositing that would probably be faster. Not for heavy 3d-apps (games) though.

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