>  Also, an annoyance.  I see alot of thin little green horizontal
>lines that flicker all over the overlay surface.  Any thoughts
>as to what those might be, or any reason they might be happening?
> I suspect it's some hardware defect and I should go buy another
>video card.   If you like I can try to describe them in more
>detail, but it's basically about maybe 30 little single pixel
>high 20 pixel wide green lines that appear randomly about the
>scaled image.

I have never heard of such a problem. What resolution/depth/refresh
are you running at? Perhaps this happens when there isn't sufficient
memory bandwidth? Like maybe 1280x1024@85hz?  It could also be a
bad watermark chosen for the mode. In Linux we have to use a pixel
clock based lookup to get a watermark which isn't always the best
choice for the mode. Other operating systems have a specific
watermark for a specific mode, but of course that only works
when the driver generates the list of available timings.

 In the back of the PRM (Programmers reference manual) there is a
list of modes and the watermarks for those modes. You might compare
X's calculated watermark (It's in the log) against the recommended
value in the PRM. If they are different you could replace the value
in the code with the recommended value to see if your problems go
away.

 -Matt
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