Re: issues with external CRT/dual USB ibook
> > on the CRT output. Having a different sync, which is what you want,
> > would require full dual head support. I don't think it will appear
> > anytime soon in aty128fb, but I think Ani Joshi have some code for
> > that in XFree. It's not in the XFree CVS though, but the basic idea
> > is to backport what is in XFree radeon driver.
>
> Umm, are you sure that a separate sync is needed?
> The picture on CRT is just fine in that it's timings are neither too fast
> nor too slow for the Monitors (I tried 3).
> It just looks like hsync on the CRT output is "wobbly", so the picture
> looks like this:
>
> -----------------------
> ( (
>
> I find it hard to imagine that the LCD can make sense of such a wavy hsync
> signal, but maybe I just don't see the real problem here...
Yep, I've seen that as well. Someone with a decent scope should figure out
what's actually generated for hsync, and if that signal itself has some
sort of jitter. Maybe the hsync just isn't phase locked to the display
clock because of a different config for the VGA out controller.
LCD and VGA hang off different timing generation circuits I believe.
Michael
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