On Wed, 2005-02-16 at 14:13 -0500, Cory Papenfuss wrote: > I'm not surprised. That's X protecting you from yourself. That > modeline runs at 480i frequencies and is meant to be displayed "directly" > on a TV.
That's what I have. My TV is plugged directly into my video card with a connector that Matrox makes for doing that. > It has a 15.7kHz horizontal frequency. In your case, you have a > VGA monitor connected and have (correctly) limited the minimum frequency > to 28kHz. Ahhh. Indeed. > If you change that to 15kHz, X won't prevent you from using > that frequency due to H frequency mismatch. It also will most likely not > work with your VGA monitor and in fact may damage it. But I have a TV hooked up, so prob(?). > > You initially asked for: > "Do you have a modeline that sets a proper ntsc resolution and timing? > 720/640x480 @ 59.9[sic] cycles/s?" > > That is what the modeline I provided does. Proper NTSC resolution > and timing with 720x480 visible resolution at 15.7kHz Horiz, 29.97Hz > vertical. I will try it. > > Do I not also need a corresponding set of framebuffer timings to match > > the X Modeline? It was the framebuffer timings that I was referring to > > before when I said that one set of timings at a given resolution does > > not seem to work from one card to another. > > > A modeline *defines* the framebuffer timings. So the Xserver Modeline is a substitute for the timings usually set with fbset/fb.modes? That I did not know. b.
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