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Old 10-11-08, 08:10 AM   #3
sfer
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Join Date: Sep 2006
Posts: 35
Default Re: High CPU usage in X server at 24Hz refresh

Sorry to dig up this old thread, but I'm having the exact same problem and haven't found any solutions for it.

I have a Geforce 7900 GTO and I'm running Ubuntu 7.04. Watching 24 fps video in mplayer with xv output and my display at 24 hz and vsync enabled in nvidia-settings causes seemingly random high cpu usage by the xorg process and video stuttering. The video stutters in a strange way, it shows frames back and forth, that is, it goes backwards a bit, then forwards and so on, making the video so irritating to watch it's no use. It seems to be triggered by the combination of 24 hz and vsync. If i remove either of them, everything works fine except that there's tearing or 3:2 pulldown judder.

If I configure mplayer to use opengl output, the video runs fine, but I get other mplayer-related problems so it's not a good solution.

Any help appreciated.
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