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Bug#251319: marked as done ([xbase-clients] /etc/X11/xinit/xserverrc calls X the wrong way)



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and subject line Bug#251319: [xbase-clients] /etc/X11/xinit/xserverrc calls X the wrong way
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Date: Fri, 28 May 2004 01:50:48 +0200
To: submit@bugs.debian.org
Subject: [xbase-clients] /etc/X11/xinit/xserverrc calls X the wrong way
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Package: xbase-clients
Version: 4.3.0.dfsg.1-1

/etc/X11/xinit/xserverrc calls X like that:
'exec /usr/bin/X11/X -dpi 100 -nolisten tcp'

The '-dpi 100' bit is wrong. It overrides anything you might have
written in the config file, which is very annoying. The config file has a
way to specify the screen size. The config file is the correct place to
put this information. The commandline in some script is _not_.

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Date: Sat, 29 May 2004 04:14:01 -0500
From: Branden Robinson <branden@debian.org>
To: 251319-done@bugs.debian.org
Subject: Re: Bug#251319: [xbase-clients] /etc/X11/xinit/xserverrc calls X the wrong way
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On Fri, May 28, 2004 at 01:50:48AM +0200, Daniel wrote:
> Package: xbase-clients
> Version: 4.3.0.dfsg.1-1
>=20
> /etc/X11/xinit/xserverrc calls X like that:
> 'exec /usr/bin/X11/X -dpi 100 -nolisten tcp'
>=20
> The '-dpi 100' bit is wrong. It overrides anything you might have
> written in the config file, which is very annoying. The config file has a
> way to specify the screen size. The config file is the correct place to
> put this information. The commandline in some script is _not_.

The issue is significantly more complex than you imply.

Permit me to refer you to the Debian X FAQ.

http://necrotic.deadbeast.net/xsf/XFree86/trunk/debian/local/FAQ

  *) Why are some fonts (or graphical rulers) sized incorrectly?

  Programs that try to optimize font sizes for better screen output (such as
  FontConfig-based applications) and those that try to show real-world geom=
etry
  (like inch/centimeter scales in the GIMP) need to know the pixel density =
of
  the display to be accurate.  This value is the ratio of the display's pix=
el
  resolution to the physical size of your monitor -- generally between 70 a=
nd
  120 DPI (dots per inch).  If the DPI value used by the X server does not =
match
  the actual monitor characteristics, applications that use this informatio=
n are
  likely to display fonts and other graphics that are scaled incorrectly ba=
sed
  on this inaccurate information.  You can use the xdpyinfo program in the
  xbase-clients package to check the assumed monitor size and dot resolutio=
n.
  The DPI value is retrieved by X client applications by querying the X ser=
ver;
  therefore, the X server needs to know (or be told) what value to use.

  Two ways to get an accurate DPI value to your application are:

  1) pass the -dpi option to the X server (this also works for many non-XFr=
ee86
     X servers); or
  2) let the XFree86 X server calculate the DPI value based on the DisplayS=
ize
     parameter in its configuration file, XF86Config-4.  See the
     XF86Config-4(5x) manual page for details.

  The first method is recommended if you already know the DPI value of your
  monitor and wish to always run it at the same resolution; the second meth=
od is
  the more flexible way, but only available for the XFree86 X server.

  Locate and edit the scripts which start the X server:

  /etc/X11/xinit/xserverrc for xinit and startx (in the xbase-clients packa=
ge)
  /etc/gdm/gdm.conf for gdm
  /etc/kde3/kdm/Xservers for kdm
  /etc/X11/wdm/Xservers for wdm
  /etc/X11/xdm/Xservers for xdm

    Passing the -dpi option to the X server:

    In each of these files above, replace the value after -dpi with the cor=
rect
    number.

    Letting the XFree86 X server calculate the DPI:

    In each of the files above, remove the -dpi word and the following numb=
er.
    Then edit /etc/X11/XF86Config-4 and locate the "Monitor" section there.
    Add a line like:

      DisplaySize     288 216

    to it. The numbers above are horizonatal and vertical dimensions of the
    monitor's visible screen area (in milimeters) which you can often find =
in
    the monitor's manual.  Manually measuring the visible screen area with a
    ruler or tape measure may be the most precise method, but keep in mind =
that
    depending on the modeline definitions, the exact measurements of the vi=
sible
    portions screen may differ from mode to mode.

  When you've finished, restart the X server and use xdpyinfo to check the =
new
  DPI settings.

Closing this spurious report.  Please edit your conffiles if you dislike the
defaults; that's why they're conffiles.

--=20
G. Branden Robinson                |     One doesn't have a sense of humor.
Debian GNU/Linux                   |     It has you.
branden@debian.org                 |     -- Larry Gelbart
http://people.debian.org/~branden/ |

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