svn commit: r39176 - head/en_US.ISO8859-1/books/handbook/x11
Warren Block
wblock at FreeBSD.org
Thu Jul 5 12:41:21 UTC 2012
Author: wblock
Date: Thu Jul 5 12:41:20 2012
New Revision: 39176
URL: http://svn.freebsd.org/changeset/doc/39176
Log:
Revise HorizSync and VertRefresh suggestions, emphasizing autodetection.
Reviewed by: doc
Modified:
head/en_US.ISO8859-1/books/handbook/x11/chapter.sgml
Modified: head/en_US.ISO8859-1/books/handbook/x11/chapter.sgml
==============================================================================
--- head/en_US.ISO8859-1/books/handbook/x11/chapter.sgml Thu Jul 5 10:20:58 2012 (r39175)
+++ head/en_US.ISO8859-1/books/handbook/x11/chapter.sgml Thu Jul 5 12:41:20 2012 (r39176)
@@ -364,36 +364,47 @@
<sect2>
<title>Before Starting</title>
- <para>Before configuration of X11
- the following information about the target system is needed:</para>
+ <para>In most cases, X11 is self-configuring. Those with older
+ or unusual equipment may find it helpful to gather some
+ hardware information before beginning configuration.</para>
<itemizedlist>
- <listitem><para>Monitor specifications</para></listitem>
- <listitem><para>Video Adapter chipset</para></listitem>
- <listitem><para>Video Adapter memory</para></listitem>
+ <listitem><para>Monitor sync frequencies</para></listitem>
+ <listitem><para>Video card chipset</para></listitem>
+ <listitem><para>Video card memory</para></listitem>
</itemizedlist>
- <indexterm><primary>horizontal scan rate</primary></indexterm>
- <indexterm><primary>vertical scan rate</primary></indexterm>
+ <indexterm>
+ <primary>horizontal sync frequency</primary>
+ </indexterm>
+ <indexterm>
+ <primary>horizontal scan rate</primary>
+ <see>horizontal sync frequency</see>
+ </indexterm>
+ <indexterm><primary>refresh rate</primary></indexterm>
+ <indexterm>
+ <primary>vertical sync frequency</primary>
+ <see>refresh rate</see>
+ </indexterm>
+ <indexterm>
+ <primary>vertical scan rate</primary>
+ <see>refresh rate</see>
+ </indexterm>
+
+ <para>Screen resolution and refresh rate are determined by the
+ monitor's horizontal and vertical sync frequencies. Almost
+ all monitors support electronic autodetection of these values.
+ A few monitors do not provide these values, and the
+ specifications must be determined from the printed manual
+ or manufacturer web site.</para>
+
+ <para>The video card chipset is also autodetected, and used to
+ select the proper video driver. It is beneficial for the user
+ to be aware of which chipset is installed for when
+ autodetection does not provide the desired result.</para>
- <para>The specifications for the monitor are used by
- X11 to determine the resolution and
- refresh rate to run at. These specifications can usually be
- obtained from the documentation that came with the monitor or from
- the manufacturer's website. There are two ranges of numbers that
- are needed, the horizontal scan rate and the vertical synchronization
- rate.</para>
-
- <para>The video adapter's chipset defines what driver module
- X11 uses to talk to the graphics
- hardware. With most chipsets, this can be automatically
- determined, but it is still useful to know in case the automatic
- detection does not work correctly.</para>
-
- <para>Video memory on the graphic adapter determines the
- resolution and color depth which the system can run at. This is
- important to know so the user knows the limitations of the
- system.</para>
+ <para>Video card memory determines the maximum resolution and
+ color depth which can be displayed.</para>
</sect2>
<sect2>
@@ -584,12 +595,12 @@ dbus_enable="YES"</programlisting>
<indexterm><primary>X11 tuning</primary></indexterm>
- <para>Next, tune the <filename>xorg.conf.new</filename>
- configuration file to taste. Open the file in a text editor such
- as &man.emacs.1; or &man.ee.1;. First, add the
- frequencies for the target system's monitor. These are usually
- expressed as a horizontal and vertical synchronization rate. These
- values are added to the <filename>xorg.conf.new</filename> file
+ <para>The <filename>xorg.conf.new</filename>
+ configuration file may now be tuned to taste. Open the file in a text editor such
+ as &man.emacs.1; or &man.ee.1;. If the monitor is an older
+ or unusual model that does not support autodetection of
+ sync frequencies, those settings can
+ be added to <filename>xorg.conf.new</filename>
under the <literal>"Monitor"</literal> section:</para>
<programlisting>Section "Monitor"
@@ -600,14 +611,11 @@ dbus_enable="YES"</programlisting>
VertRefresh 48-120
EndSection</programlisting>
- <para>The <literal>HorizSync</literal> and
- <literal>VertRefresh</literal> keywords may be missing in the
- configuration file. If they are, they need to be added, with
- the correct horizontal synchronization rate placed after the
- <literal>HorizSync</literal> keyword and the vertical
- synchronization rate after the <literal>VertRefresh</literal>
- keyword. In the example above the target monitor's rates were
- entered.</para>
+ <para>Most monitors support sync frequency autodetection, making
+ manual entry of these values unnecessary. For the few
+ monitors that do not support autodetection, avoid potential
+ damage by only entering values provided by the
+ manufacturer.</para>
<para>X allows DPMS (Energy Star) features to be used with capable
monitors. The &man.xset.1; program controls the time-outs and can force
@@ -684,7 +692,7 @@ EndSection</programlisting>
<title>Advanced Configuration Topics</title>
<sect3>
- <title>Configuration with &intel; i810 Graphics Chipsets</title>
+ <title>Configuration with &intel; <literal>i810</literal> Graphics Chipsets</title>
<indexterm><primary>Intel i810 graphic chipset</primary></indexterm>
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