I cannot help you much more. Just mention a couple of things:
It seems that RH implemented 4.2 to use XF86Config and not XF86Config-4 anymore (at least if
there is no reason to run 3.3.6 somebody else in this list had the same eyperience a couple of
months ago
It also seems that the HOWTOs evolve and loose (what I personally find interesting) technical
information as Linux and X become able to detect and set things automatically (for instance I
noticed that with network management info on the later HOWTOs) possibly you might be able to find
an antique HOWTO which explains things in more details...
I stored a few things some time ago I am puting them here hoping tehy might help rather than
confuse the issue I apologise if this is not the case...
The mode-description is in four sections, the first three of which are mandatory. The first is the
dot (pixel) clock. This is a single number specifying the pixel clock rate for the mode in MHz.
The second section is a list of four numbers specifying the horizontal timings. These numbers are
the hdisp, hsyncstart, hsyncend, and htotal values. The third section is a list of four numbers
speci fying the vertical timings. These numbers are the vdisp, vsyncstart, vsyncend, and vtotal
values.
example using 85hz:
Modeline "1024x768" 85.00 1024 1100 1292 1328 768 771 781 794 -hsync -vsync
Hope that helps
Lionel
--- Patrick Connolly <p.connolly@hortresearch.co.nz> wrote:
> On Wed, 12-Jun-2002 at 12:08AM -0700, Lionel Lecoq wrote:
>
> |> Sorry not to be able to give you much details: I usally don't have
> |> any modeline and synch info in my config (4.1) X seems to find its
> |> way, I append an example of my monitor section:
>
> |> Section "Monitor"
> |> Identifier "my monitor"
> |> VendorName "Unknown"
> |> ModelName "Unknown"
> |> HorizSync 31-70 # it's a rather old beast with modest specs
> |> VertRefresh 55-120
> |> Option "dpms"
> |> EndSection
> |>
>
> From my understanding, that would use the highest dots clock possible.
> I want to use a lower one on account of interference produced from the
> highest dots clock. I think I need to reduce it from 99 to 85. There
> must a way of specifying just which frequencies something like how it
> was done with modlines, but the most recent HOW-TOs seem to indicate
> it's all trivial and seem to refer to XF86Config (not XF86Config-4)
> with the objective of getting a default configuration to work, but I
> don't notice anything in Linux XFree86 HOWTO that refers to what I'm
> interested in. I don't think .xinitrc is the area I'm interested in.
>
>
> |> I would assume that unless you are faced with a ticklish monitor
> you could also do it that way
>
>
> |> -hsync means something different from
> |> -Hsync (don't ask me what I knew it long ago but have
> |> forgotten, there is an HOWTO as well as a small program to mess
> |> around with these parameters if you go into the docs...)
>
> I also didn't notice anything in XFree86 Video Timings HOWTO about
> such a difference. Perhaps I missed it. If they're different, I
> could be doing damage. Perhaps for the particular mode I'm interested
> in, it makes sense to have the section empty? On two different
> systems, it comes up so. One machine seems to be using it -- or at
> least something that has that frequency and resolution information.
>
> |> Those modelines were found more often in 3.3.6 configs are you
> |> running 3.3.6?
>
> No. It's XFree86 Version 4.2.0 (Red Hat Linux release: 4.2.0-8). I'm
> still mystified about the XF86Config-4 file which appears not to be
> used -- at lest WRT dots clock and resolution.
>
> best
>
> P
>
>
>
> |> Lionel
> |>
> |> --- Patrick Connolly <p.connolly@hortresearch.co.nz> wrote:
> |> > On Tue, 11-Jun-2002 at 06:59AM -0700, Lionel Lecoq wrote:
> |> >
> |> > |> The reasonable way to find out which version of X you are running
> |> > |> is to either do X -version or look in the log
> |> >
> |> > That's a more obvious way, of course. I can't quite imagine what the
> |> > thinking would be behind the directions RedHat gives.
> |> >
> |> >
> |> > |> (/var/log/XFree86.0.log) Once you know what you are running,
> |> > |> assuming you have both 3.3.6 and 4.x.x then you can switch from the
> |> >
> |> > I'm not particularly interested in changing between them. It works
> |> > fine except I'd like to change the dots clock. I just want to know
> |> > where the best place to modify the configuration is.
> |> >
> |> > It might make sense to copy the modeline and corresponding lines from
> |> > XF86Config to XF86Config-4 so that they'll be used there -- I use
> |> > Version 4.2.0. But do we know the XF86Config file will be ignored?
> |> > That's the sort of information I would like to have clarified.
> |> >
> |> > I'm a little reluctant to try it out since the line I'd like to be able
> |> > to use makes no mention of -hsync and -vsync.
> |> >
> |> > # 1024x768 @ 76 Hz, 62.5 kHz hsync
> |> > Modeline "1024x768" 85 1024 1032 1152 1360 768 784 787 823
> |> >
> |> > Or would it be better to simply quote out the line I don't want used?
> |> > BTW: Is '-hsync' the same as '-Hsync'? It appears from other parts of
> |> > the file to be so, but it might be in error.
> |> >
> |> > best
> |> >
> |> > P
> |> >
> |> >
> |> >
> |> >
> |> >
> |> > |> --- Patrick Connolly <p.connolly@hortresearch.co.nz> wrote:
> |> > |> > On Mon, 10-Jun-2002 at 11:52PM -0700, Lionel Lecoq wrote:
> |> > |> >
> |> > |> > |> I am afraid the XF86Config-4 files are only supplied by a couple of
> |> > |> > |> distributions (RH for instance) because they provide BOTH 3.3.6 and
> |> > |> > |> 4.x.x. As a consequence it is not a standard and is probably only
> |> > |> > |> documented (if at all) in those distributions. As an aside, I am
> |> > |> > |> surprised to find out that The files in /usr/X11R6/lib/X11 are
> |> > |> > |> used: on one of my PC I am running RH 7.1 with both 3.3.6 and 4.x.x
> |> > |> > |> (depending on the user id, with 3.3.6 I get acceleration not with
> |> > |> > |> 4.x.x -its an old PC) in my case, I doubt very much that anything
> |> > |> > |> else than what is in /etc/X11 is used...
> |> > |> >
> |> > |> > Could it just be that it's detail not tidied up properly?
> |> > |> >
> |> > |> > |> Anyhow, If you are using only one version why not copy the relevant
> |> > |> > |> file onto the other.
> |> > |> >
> |> > |> > Basically because I don't know what I'm doing yet. I was hoping to
> |> > |> > find documentation to rectify the matter. I wanted to be able to
> |> > |> > change the vertical refresh rate (and by implication, the dot clock)
> |> > |> > and I wanted to find out the most koshur way of doing it.
> |> > |> >
> |> > |> > The RedHat docs tell me:
> |> > |> >
> |> > |> > <quote>
> |> > |> > First, see which version of X you are running. Type this command:
> |> > |> > ls -l /etc/X11/X
> |> > |> >
> |> > |> > If it is linked to a file that has XF86 in the name (such as
> |> > |> > /usr/X11R6/bin/XF86_SVGA) then you are using XFree86 3.3.x. If the
> |> > |> > file that it is linked to is XFree86 then you are using XFree86 4.x.
> |> > |> >
> |> > |> > If you are running 3.3.x, look at the file /etc/X11/XF86Config. If
> |> > |> > your are running 4, then look at /etc/X11/XF86Config-4...... {That was
> |> > |> > to do with looking for color depth, but the same applies to modelines.]
> |> > |> > </quote>
> |> > |> >
> |> > |> > This gives contradictory information. According to this, I'm running
> |> > |> > XFree86 4.x, but my system can't be using the /etc/X11/XF86Config-4
> |> > |> > file because it doesn't cover the resolution I am using -- that
> |> > |> > information MUST be coming from the XF86Config file. So, until I
> |> > |> > understand what is meant to be going on, I'm a bit reticent to be very
> |> > |> > adventurous.
> |> > |> >
> |> > |> > best
> |> > |> >
> |> > |> > P
> |> > |> >
> |> > |> >
> |> > |> >
> |> > |> >
> |> > |> > |>
> |> > |> > |>
> |> > |> > |> --- Patrick Connolly <p.connolly@hortresearch.co.nz> wrote:
> |> > |> > |> > Contrary to what people tell me, it seems to be certain that
> |> > |> > |> > XF86Config files are still necessary since the XF86Config-4 is too
> |> > |> > |> > sparse. Is there documentation that covers how these files are
> |> > |> > |> > linked?
> |> > |> > |> >
> |> > |> > |> > I'm finding it confusing to work out why /usr/X11R6/lib/X11/XF86Config
> |> > |> > |> > links to /etc/X11/XF86Config, not /etc/X11/XF86Config-4 when the new
> |> > |> > |> > format is ostensibly taken care of in the -4 file.
> |> > |> > |> >
> |> > |> > |> > Points to docs, please. The HOW-TOs don't seem to cover it.
> |> > |> > |> >
> |> > |> > |> > best
> |> > |> > |> >
> |> > |> > |> > --
> |> > |> > |> > Patrick Connolly
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> |> > |> > |> >
> |> > |> > |> >
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