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Optimum settings for 2900

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  • Optimum settings for 2900

    I have a 2900HD and I have looked through the forums for the best xorg.conf settings for my card. Should I have VideoOverlay on or TexturedVideo?

    OpenGLOverlay should be off? I have flickering video but I understand that it is an onging bug. Is this true?

    What other options are there to take advantage of?


  • #2
    I never did find out the many fglrx options for xorg.conf, so I really wouldn't know. The only options I have played with are VideoOverlay, OpenGLOverlay, and OffScreenPixmaps. I found that using VideoOverlay (Xv) has a much lower CPU usage rating than OpenGLOverlay (OGL rendering). OffScreenPixmaps was needed in earlier driver releases because of a screen corruption bug, but it has been fixed since the 8.01 release.

    I have found that "flickering" can mean a lot of things for different people. Some call flickering what I would describe as image tearing. What I call flickering is when the image on the screen comes on and off in rapid succession. This flickering I only experience when attempting to render videos in OGL or Xv while Compiz is on, which is more of a X issue that a driver "bug".

    For my HD2900XT I just use the overlay options I mentioned above, and the card seems to perform adequately just like that.


    • #3
      For your Radeon HD 2900 series, you should use

      Option "TexturedVideo"

      in your device section (no Overlays). If you have bad performance with GTK applications/Compiz, you can give

      Option "XAANoOffscreenPixmaps"

      a try, too. You shouldn't need many more things...


      • #4
        Brilliant, thank you.

        I do get the intermittent video that you call flickering while rendering in Xv (or OpenGL, or X11) with Compiz. I wish it would be fixed!


        • #5
          Just as a further point, for anyone else in the same position, I have worked around the flickering video problem by using the Compiz video plugin and compiling mplayer from SVN to enable support for it.

          Simple instructions for Ubuntu are available:

          No doubt they will apply equally on other distros.