Richard Lynch writes:
> While attempting (and failing) to find a ModeLine that works, I found
> some oddities.
>
> I've put in some very wide ranges for Horizontal and Vertical timings.
>
> The log file shows them as being accepted, near as I can tell.
>
> Various ModeLines I was trying would be rejected "(illegal vertical
> timings)", but I just figured that was you guys being smart (yay!)
> and saving me from blowing up my monitor or something...
This means that the 4 timing parameters (display end, sync start, sync
end, total) are somehow not valid. If they were out of range the
reason would be (??? out of range).
>
> But then I put in one that was rejected, and the SAME numbers end up
> getting used anyway as one of the default settings.
>
> Is that weird, or am I just not understanding something?
ModeLine "640x480" 12.00 640 648 664 688 480 480 480 490
^^^^^^^^^^^^^^^
This modeline from the config file you've posted on the net
is bad. You cannot have a sync pulse width of 0.
>
> I suppose it's possible that ModeLines from idiots (me) would be
> rejected as "dangerous" while others that got hand-checked somehow
> (?) by geniuses (you guys) would have the same numbers and work as
> defaults, but that seems kind of odd...
>
No. We validate every mode line the same way.
> XF86Config and XFree86.0.log (revised slightly from previous post) are here:
> http://l-i-e.com/xfree86/
>
> It's still very speckly, though the lower dot-clocks seem to make it
> more "vertical streaky" rather than "speckly" at least until I move
> the mouse around...
12 MHz is indeed *very* low.
>
> Just what sort of fine-grained numbers should one try in the binary
> search between a ModeLine that is "speckly" (dot clock too high?) and
> one that is rejected out of hand? IE, if 15.00 is "illegal vertical
> timings" and 15.01 is speckly, is 15.005 an option or do I just give
> up at that point?
No, I don't think you have a realistic chance doing this at all.
There seems to be something else wrong which I cannot figure out
from here.
Egbert.
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