On Tue, 2005-02-15 at 14:35 -0500, Cory Papenfuss wrote: > Isn't that what VSYNC is supposed to be for?
Exactly. The G400 (probably others) is able to interrupt on the vsync pulse allowing the driver and software above it to know when the vsync has happened and thus when to load the next frame into video memory (frame flip). But AFAIK, X11 does not support vsyncing. There is no way for an X11 application to know when the vsync pulse has hit so it can't really know when to frame flip. Also the video hardware has to be able to encode to TV-Out in an interlaced overscanned mode. I have only seen the G400 able to do this properly with DirectFB's help. matroxset and X11 and the framebuffer don't do it properly. > Right now I need to do > deinterlacing or I get tearing. Yup. Exactly. b.
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