Re: [gentoo-user] Desperately seeking modelines; xorg 1.6.3.901-r2 bleeds off the edges

["Kevin O'Gorman" <kogorman@gmail.com>]

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On Sat, Oct 17, 2009 at 12:34 PM, Alan McKinnon <alan.mckinnon@gmail.com>wrote:

> On Saturday 17 October 2009 21:26:41 Kevin O'Gorman wrote:
> > On Sat, Oct 17, 2009 at 12:18 PM, Alan McKinnon
> <alan.mckinnon@gmail.com>wrote:
> > > On Saturday 17 October 2009 20:58:00 Kevin O'Gorman wrote:
> > > > Modifying the monitor section made no noticeable change.  There's
> still
> > > > a 24-pixel bleed off the right edge to begin with.  I can fool with
> > >
> > > settings
> > >
> > > > to make it bleed left instead, but there's no setting that affects
> > > > pixel spacing.  I like the cleaner monitor section, though.
> > > >
> > > > I'm back to thinking about modelines.  Any better ideas?
> > >
> > > I'd try adjust the frequencies first, then try modelines.
> > >
> > > --
> > > alan dot mckinnon at gmail dot com
> > >
> > > I'd try that too if I had a clue how to do it, let alone do it safely.
> > > Got
> >
> > any pointers to FMs?
>
> Safe frequency ranges are in the monitor's documentation. Do you have docs
> for
> your monitor (I'm using it's a CRT).
>
> You can safely reduce either horiz or vert range. As the electronics[1]
> age,
> the monitor's ability to correctly sync the start of the picture with the
> start of the display area deteriorates, especially at the upper bound. If
> reducing the upper bound of the horiz setting improves matters, that is
> indicative of this happening.
>
> [1] more specifically, electrolytic capacitors. They are temperature-
> sensitive. Silicon does not "wear out" as such.
>
> --
> alan dot mckinnon at gmail dot com
>
> I have docs.  They are not very informative.

When I start it up, the left edge is fine, which is the sync edge.  Because
of that and because I can adjust positioning left and right, and because the
problem arose abruptly with the reboot to a new Xorg, I rate the probability
of hardware problems low (but not zero of course).

It appears to be a problem of horizontal spacing of the pixels.  At it
stands there is not room for the last 24.

-- 
Kevin O'Gorman, PhD

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