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"http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd" [
]>

<book>

<bookinfo>
    <title>ATI R200 + XFree86 4.x mini-HOWTO</title>
    <author>
      <firstname>Havard</firstname><surname>Stranden</surname>
      <affiliation>
	<address><email>havarden@cloudchaser.net</email></address>
      </affiliation>
    </author>

<pubdate>2002-09-12</pubdate>
<revhistory>
      <revision>
	<revnumber>1.1</revnumber>
	<date>2002-09-30</date>
	<authorinitials>tab</authorinitials>
	<revremark>Reviewed by LDP</revremark>
      </revision>
      <revision>
	<revnumber>1.0</revnumber>
	<date>2002-09-12</date>
	<authorinitials>HS</authorinitials>
	<revremark>Initial release</revremark>
      </revision>
</revhistory>

<abstract>
<para>This HOWTO is for anyone who owns an ATI Radeon 8xxx graphics card and wants it to
function in a certain way or, in general, properly with XFree86, the XWindow system. 
It describes the procedure of making XFree 4.x run on an ATI R200
(Radeon 8xxx series). There are several ways of doing this, with various
results (further described below). If you know of any other ways (maybe
better as well) of achieving the goal of this document, please let me know.</para>
</abstract>
</bookinfo>

<toc></toc>

<chapter id="copyright">
<title>Copyright License</title>

<para>Copyright (c) 2002  Havard Stranden</para>

<para>
      Permission is granted to copy, distribute and/or modify this document
      under the terms of the GNU Free Documentation License, Version 1.1
      or any later version published by the Free Software Foundation;
      with no Invariant Sections, with no Front-Cover Texts, and with no 
      Back-Cover Texts. A copy of the license is included in <xref linkend="gfdl" />, 
      entitled "GNU Free Documentation License".
</para>
</chapter>

<chapter id="sysreq">
<title>System Requirements</title>

<para>For this HOWTO to apply to you, you'll need the following hardware/software
up and running:</para>

<para>Hardware</para>
<itemizedlist>
      <listitem><para>ATI R200 (Radeon 8xxx) AGP card</para></listitem>
</itemizedlist>

<para>Software</para>
<itemizedlist>
      <listitem><para>Linux kernel 2.4.x (check with <userinput>uname -r</userinput>)</para></listitem>
      <listitem><para>Glibc 2.2 (check with <userinput>/lib/libc.so.X</userinput>)</para></listitem>
      <listitem><para>XFree86 4.2.x for alternative 1 (check with <userinput>X -version</userinput>)</para></listitem>
      <listitem><para>XFree86 4.1.x for alternatives 2 and 3 (check with <userinput>X -version</userinput>)</para></listitem>
      <listitem><para>XFree86 4.x for alternative 4 (check with <userinput>X -version</userinput>)</para></listitem>
</itemizedlist>

<important>
<para>If you run XFree86 4.1.x/4.0.x on your computer, you can NOT use alternative 1, as shown above.  Of course you can try it, but it won't work (or at least it didn't for me).  Also, if you read <ulink url="http://www.xfree86.org/">The XFree86 Project</ulink>'s <ulink url="http://www.xfree86.org/4.1.0/RELNOTES.html">release notes</ulink> for XFree 4.1.x, you'll see that the R200 chipset is not listed as a supported chipset for the <filename class="libraryfile">radeon_drv.o</filename> driver, which means that the Radeon 8xxx is NOT supported. However, if you read the <ulink url="http://www.xfree86.org/4.2.0/RELNOTES.html">release notes</ulink> for XFree 4.2.x, you'll see that the chipset IS supported by the same driver.</para>
</important>

<para>I have made a bash script which checks the dependencies for you. You can download
it from <ulink url="http://linux.cloudchaser.net/HOWTOs/check_version.sh">here</ulink>.</para>

<para>Once you have met the system requirements, it's time to decide which of
the available alternatives to choose.</para>

</chapter>

<chapter id="alt-decide">
<title>Deciding Which Alternative to Use</title>

<para>As you could see in <xref linkend="sysreq" />, the alternatives you can
choose may be limited by the XFree86 version you are running.
It is very important that you check the dependencies first. If you don't meet
the requirements, this HOWTO will not apply to you, and you may and probably will
suffer a system crash if proceeding.</para>

<para>The various alternatives of this HOWTO will give variable results. I haven't
tested every possible use of the card, but I have had a few experiences, and the drivers
also provide some information.</para>

<sect1 id="alt1-probs">
<title>Problems with Alternative 1</title>
<para>Alternative 1 is by far the simplest and safest way to set up your Radeon if you
use XFree 4.2.x. On the other hand, this works ONLY in XFree 4.2.x, and I also found
that video playback wouldn't work with the X11/Xv video out device im mplayer (which
is the best and default video out device to use if you're running mplayer in X).
Also, this driver only supports 2D (meaning DRI won't work).</para>
</sect1>

<sect1 id="alt2-probs">
<title>Problems with Alternative 2</title>
<para>Alternative 2 seemed like a good idea to me when I first started configuring my Radeon.
ATI is known for developing good drivers, and I didn't expect this to be an exception, but started to fear problems when I read the information on ATIs website. First of all, the drivers were not supported by ATI, and all they had done was put together "a team of Linux developers" and make a driver. Also, the driver was available ONLY as an RPM package, which doesn't make it suitable for every Linux system.</para>

<para>Installation of the driver went fine, although it might be a little more complex than what
you'd expect. X seemed happy with the driver as well, until I started testing things. The
DRI extension doesn't work with the ATI driver, it runs its own 3D libraries and it doesn't
work with mplayers default video out device (neither did XFree's own driver). Still, this
driver has a few nice features, among them the ATI Control Panel (well known for Windows
users), and although ATI run their own 3D solution instead of X's, it should support 3D, however
this has not been extensively tested.</para>
</sect1>

<sect1 id="alt3-probs">
<title>Problems with Alternative 3</title>
<para>Alternative 3 seemed like a good idea after running tired on the mplayer and DRI problems
with both previous driver alternatives. DRI is the 3D part of XFree86, and is an independent
project, releasing it's own drivers. XFree86 has DRI implemented, but the drivers aren't the
same. In fact, DRI has developed their own driver specifically for the R200 chipset, meaning
it is a driver that supports 3D and works fine with X. Still, it doesn't fix the problem with
the mplayer video output.</para>
</sect1>

<sect1 id="alt4-probs">
<title>Problems with Alternative 4</title>
<para>Alternative 3 was something I wasn't immediately to keen on trying. Using 3rd party drivers
isn't the first thing you want to do when you want a stable system, at least not when
the drivers are developed by someone totally independent. The driver comes in 2 modules, the
driver itself and a DRI support module. This seemed a bit weird, but it works, and is in my
opinion the best alternative if you want everything to work. The mplayer problem is gone, and
everything runs smoothly. Still, this alternative is from a 3rd party, and may therefore be far
less stable and safe than the other alternatives.</para>
</sect1>

<sect1 id="choice_rec">
<title>Still Haven't Chosen One?</title>
<para>I'd recommend you to use alternative 4 (the GATOS driver). It works with all major release 4
versions of XFree86, and it supports everything. If looking for a stable system is what you want,
I'd recommend you to make the upgrades necesseary and go for ATIs driver or XFree86's own driver.</para>

<para>Now that you've been given the information you need to choose a driver, choose one and move on!</para>

</sect1>
</chapter>

<chapter id="instructions">
<title>Step-by-step instructions</title>

<sect1 id="using_xf_driver">
<title>Using XFree86's Radeon driver</title>

<para>This alternative requires XFree 4.2, and the installation or upgrade to this version is beyond the scope of this HOWTO (visit <ulink url="http://www.xfrree86.org/">The XFree86 Project</ulink> for further information on how to upgrade or install XFree86). When XFree is installed and/or upgraded to the correct version, all you need to do is configure it. There are two ways of doing this that apply to all Linux distributions. You can either run <command>xf86onfig</command>, which is XFree86's own text-based configuration tool, or you can edit the configuration file by hand. Keep in mind that this HOWTO only describes how to configure the Radeon card, and XFree86 needs a lot more configuration than that to work.</para>

<para>If you choose to run <command>xf86config</command>, you will sooner or later come to the question, <quote>Do you want to look at the card database? (y/n)</quote>. Answer <userinput>y</userinput> (yes), and press <userinput>ENTER</userinput>.  Choose one of the cards that use the <literal>ati</literal> driver by keying in the number to its left and then pressing <userinput>ENTER</userinput>. Which card you choose does not matter, as long as you choose a card that runs the <literal>ati</literal> driver. You will then be asked to give an identifier string for your card. You can type anything you want, but I recommend you type something descriptive, such as <quote>Radeon card</quote>. Finish the configuration process.</para>

<para>If you want to edit the configuration file manually, locate it (usually <filename>/etc/X11/XF86Config</filename>), and open it in your favorite editor. Find the place that  says <literal>Section "Device"</literal>. In this section, there should be a line saying <literal>Driver "somedrivername"</literal>. Edit this line so it says <literal>Driver "ati"</literal>. Comment out all other lines in the Device section (add a # in front of them). Your device section should now look like this:
</para>

<screen>
Section "Driver"
Identifier "some_identifier" (the identifier is your choice, but if you edit it, 
make sure you update  every reference to it in the config file).
Driver "ati"

# ... 
# ...
</screen>

<para>You are now ready to run!</para>

<para>Configure the rest of XFree86, and you're ready to run!</para>
</sect1>

<sect1 id="using_ati_driver">
<title>Using ATI's own R200 Driver</title>

<para>ATI's R200 driver comes in two distributions - one for XFree4.1 and one for XFree4.2. You can download ATIs driver from <ulink url="http://www.ati.com/support/products/pc/radeon8500/linux/radeon8500linuxdrivers.html">here</ulink>. Sadly, for those of us who do not use RedHat, the package is only available in RPM format (yes, I know that other distributions support RPM as well, but far from all of them). For those of us who do not have RPM support, <literal>alien</literal> is the program to use. Alien converts between various package formats. To convert the ATI driver package to a <filename>.deb</filename> package, use <command>alien --to-deb packagename.rpm</command>. To convert it to a <filename>.tgz</filename> package, use <command>alien --to-tgz packagename.rpm</command>.</para>

<para>You are now ready to install the driver. To install it, use:</para>

<itemizedlist>
	<listitem><para><command>rpm -i --force /path/to/packagename.rpm</command>, if you are installing the rpm package</para></listitem>
	<listitem><para><command>dpkg -i --force-overwrite /path/to/packagename.deb</command>, if you made a .deb package</para></listitem>
	<listitem><para><command>cd /  tar zxvf /path/to/packagename.tgz</command>, if you made a .tgz package.</para></listitem>
</itemizedlist>

<para>You are now ready to configure the driver. To install it, issue the following commands as root:</para>

<screen>
cd /lib/modules/fglr200/build_mod/
./make.sh
cd /lib/modules/fglr200/
./make_install.sh
</screen>

<para>The driver is now ready for use.</para>

<important><para>The driver will not load unless you tell your Linux system to load it every time
at startup. To do this, you must find out where to tell your Linux which modules to load at startup. In Debian, you must add the followng line to <filename>/etc/modules</filename>:</para>
<screen>
fglr200
</screen>

<para>Add the line to the end of the file. You are now ready to configure XFree86.</para>
</important>

<para>XFree86 can be configured in two ways:  either by running <command>fglrxconfig</command> (supplied by the ATI driver), or by editing the <filename>XF86Config</filename> file manually.</para>

<para>If you choose to run <command>fglrxconfig</command>, the process is similar to a regular <command>xf86config</command> run, except for the choice of which screen card driver to use (which will automatically be set to the ATI Radeon driver).</para>

<para>If you want to edit the configuration file manually, locate it (usually <filename>/etc/X11/XF86Config</filename>), and open it in your favorite editor. Find the place saying <literal>Section "Device"</literal>. In this section, there should be a line saying <literal>Driver "somedrivername"</literal>. Edit this line so it says <literal>Driver "fglr200"</literal> and add the following lines right below that line: </para>

<screen>
Option "no_accel" "no"
Option "no_dri" "no"
Option "overlay" "off"
</screen>

<para>Comment out all other lines in the Device section (add a # in front of them). Your device section should now look like this:</para>

<screen>
Section "Driver"
Identifier "some_identifier" (the identifier is your choice, but if you edit it, 
make sure you update every reference to it in the config file).
Driver "fglr200"
Option "no_accel" "no"
Option "no_dri" "no"
Option "overlay" "no"

# ... 
# ...

</screen>

<para>You are now ready to run!</para>

</sect1>

<sect1 id="using_dri_driver">
<title>Using DRI's Latest Radeon Driver</title>

<para>The first thing you must do is to download the driver. You can download it from <ulink url="http://dri.sourceforge.net/download.phtml">here</ulink> (make sure you download the <filename>r200-XXXXXXXX-i386.tar.bz2</filename> package). After you have downloaded the driver, go to the directory you saved it in and type <command>tar jxvf packagename.tar.bz2</command>.  Go to the new directory, (<command>cd dripkg/</command>), and type <command>./install.sh</command>. This will install the driver for you. You are now ready to configure XFree86, either by running <command>xf86config</command> or by editing the config file manually. The configuration process is exactly the same as in <xref linkend="using_xf_driver" />, so just follow the configuration steps there.</para>

<para>You are now ready to run XFree86!</para>
</sect1>

<sect1 id="using_gatos_drivers">
<title>Using the GATOS Project's Latest Driver</title>

<para>The GATOS project is an independent developer team. They develop drivers and utilities for ATI cards. To install their driver with DRI-support, you need to download it from <ulink url="http://gatos.sourceforge.net/project/showfiles.php?group_id=12629">here</ulink>. Download the <filename>ati.2</filename> file for your appropriate XFree86 version. You also need a set of files to enable dri support. These files are called the drm-kernel module. They can only be downloaded from CVS. To download them, issue the following commands:</para>

<screen>
cvs -d:pserver:anonymous@cvs.gatos.sourceforge.net:/cvsroot/gatos login
cvs -z3 -d:pserver:anonymous@cvs.gatos.sourceforge.net:/cvsroot/gatos co drm-kernel
</screen>

<para>You are now ready to install the driver. Type the following commands to install it:</para>

<screen>
cd drm-kernel/
make -f Makefile.linux
cp radeon.o /lib/modules/`uname -r`/kernel/drivers/video/gatosdrm.o
modprobe gatosdrm
</screen>

<para>You now need to make Linux load the module gatosdrm each time at startup. To do this, find out where your Linux distribution keeps the list of modules to load at startup and add the line <literal>gatosdrm</literal> to the end of that file (in Debian, the file is <filename>/etc/modules</filename>).</para>

<para>You are now ready to install the GATOS driver for the Radeon card. To do so, type the following commands: </para>

<screen>
cd /usr
tar zxvf /path/to/name-of-ati.2-package.tar.gz
</screen>

<para>The driver is now installed.</para>

<para> You are now ready to configure XFree86. This can be done by running <command>xf86config</command>, or by editing the XFree86 configuration file manually.  The configuration process is the same as for XFree86's own driver in <xref linkend="using_xf_driver" />, so go back to that point and follow the XFree86 configuration process described there.</para>

<para>You are now ready to run XFree86!</para>
</sect1>
</chapter>

<chapter id="links">
<title>Links</title>

<itemizedlist>
      <listitem><para><ulink url="http://www.ati.com/support/products/pc/radeon8500/linux/radeon8500linuxdrivers.html">http://www.ati.com/support/products/pc/radeon8500/linux/radeon8500linuxdrivers.html</ulink> - ATIs R200 driver for XFree86 4.1.x/4.2.x</para></listitem>
      <listitem><para><ulink url="http://gatos.sf.net/">http://gatos.sf.net/</ulink> - The GATOS Projects homepage - ATI drivers and utilities</para></listitem>
      <listitem><para><ulink url="http://gatos.sourceforge.net/project/showfiles.php?group_id=12629">http://gatos.sourceforge.net/project/showfiles.php?group_id=12629</ulink> - The download section of the GATOS project's website.</para></listitem>
      <listitem><para><ulink url="http://dri.sf.net/">http://dri.sf.net/</ulink> - The DRI Project, the Direct Rendering Infrastructure for XFree86. 3D Support, drivers and documentation.</para></listitem>
      <listitem><para><ulink url="http://dri.sourceforge.net/download.phtml">http://dri.sourceforge.net/download.phtml</ulink> - The download section of the DRI's website.</para></listitem>
      <listitem><para><ulink url="http://linux.cloudchaser.net/">http://linux.cloudchaser.net/</ulink> - Havard Stranden's Linux website</para></listitem>
</itemizedlist>

</chapter>

<appendix id="gfdl">
<title>GNU Free Documentation License</title>
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      License, in the form shown in the Addendum below.</para>
      </listitem>

      <listitem><para>Preserve in that license
      notice the full lists of Invariant Sections and required Cover
      Texts given in the Document's license notice.</para>
      </listitem>

      <listitem><para>Include an unaltered
      copy of this License.</para>
      </listitem>

      <listitem><para>Preserve the section
      entitled "History", and its title, and add to it an item stating
      at least the title, year, new authors, and publisher of the
      Modified Version as given on the Title Page.  If there is no
      section entitled "History" in the Document, create one stating
      the title, year, authors, and publisher of the Document as given
      on its Title Page, then add an item describing the Modified
      Version as stated in the previous sentence.</para>
      </listitem>

      <listitem><para>Preserve the network
      location, if any, given in the Document for public access to a
      Transparent copy of the Document, and likewise the network
      locations given in the Document for previous versions it was
      based on.  These may be placed in the "History" section.  You
      may omit a network location for a work that was published at
      least four years before the Document itself, or if the original
      publisher of the version it refers to gives permission.</para>
      </listitem>

      <listitem><para>In any section entitled
      "Acknowledgements" or "Dedications", preserve the section's
      title, and preserve in the section all the substance and tone of
      each of the contributor acknowledgements and/or dedications
      given therein.</para>
      </listitem>

      <listitem><para>Preserve all the
      Invariant Sections of the Document, unaltered in their text and
      in their titles.  Section numbers or the equivalent are not
      considered part of the section titles.</para>
      </listitem>

      <listitem><para>Delete any section
      entitled "Endorsements".  Such a section may not be included in
      the Modified Version.</para>
      </listitem>

      <listitem><para>Do not retitle any
      existing section as "Endorsements" or to conflict in title with
      any Invariant Section.</para>
      </listitem>
    </orderedlist>
    
    <para>If the Modified Version includes new front-matter sections
    or appendices that qualify as Secondary Sections and contain no
    material copied from the Document, you may at your option
    designate some or all of these sections as invariant.  To do this,
    add their titles to the list of Invariant Sections in the Modified
    Version's license notice.  These titles must be distinct from any
    other section titles.</para>

    <para>You may add a section entitled "Endorsements", provided it
    contains nothing but endorsements of your Modified Version by
    various parties--for example, statements of peer review or that
    the text has been approved by an organization as the authoritative
    definition of a standard.</para>

    <para>You may add a passage of up to five words as a Front-Cover
    Text, and a passage of up to 25 words as a Back-Cover Text, to the
    end of the list of Cover Texts in the Modified Version.  Only one
    passage of Front-Cover Text and one of Back-Cover Text may be
    added by (or through arrangements made by) any one entity.  If the
    Document already includes a cover text for the same cover,
    previously added by you or by arrangement made by the same entity
    you are acting on behalf of, you may not add another; but you may
    replace the old one, on explicit permission from the previous
    publisher that added the old one.</para>

    <para>The author(s) and publisher(s) of the Document do not by
    this License give permission to use their names for publicity for
    or to assert or imply endorsement of any Modified Version.</para>
  </sect1>

  <sect1 id="gfdl-5">
    <title>COMBINING DOCUMENTS</title>

    <para>You may combine the Document with other documents released
    under this License, under the terms defined in section 4 above for
    modified versions, provided that you include in the combination
    all of the Invariant Sections of all of the original documents,
    unmodified, and list them all as Invariant Sections of your
    combined work in its license notice.</para>

    <para>The combined work need only contain one copy of this
    License, and multiple identical Invariant Sections may be replaced
    with a single copy.  If there are multiple Invariant Sections with
    the same name but different contents, make the title of each such
    section unique by adding at the end of it, in parentheses, the
    name of the original author or publisher of that section if known,
    or else a unique number.  Make the same adjustment to the section
    titles in the list of Invariant Sections in the license notice of
    the combined work.</para>

    <para>In the combination, you must combine any sections entitled
    "History" in the various original documents, forming one section
    entitled "History"; likewise combine any sections entitled
    "Acknowledgements", and any sections entitled "Dedications".  You
    must delete all sections entitled "Endorsements."</para>
  </sect1>

  <sect1 id="gfdl-6">
    <title>COLLECTIONS OF DOCUMENTS</title>

    <para>You may make a collection consisting of the Document and
    other documents released under this License, and replace the
    individual copies of this License in the various documents with a
    single copy that is included in the collection, provided that you
    follow the rules of this License for verbatim copying of each of
    the documents in all other respects.</para>

    <para>You may extract a single document from such a collection,
    and distribute it individually under this License, provided you
    insert a copy of this License into the extracted document, and
    follow this License in all other respects regarding verbatim
    copying of that document.</para>
  </sect1>

  <sect1 id="gfdl-7">
    <title>AGGREGATION WITH INDEPENDENT WORKS</title>
    
    <para>A compilation of the Document or its derivatives with other
    separate and independent documents or works, in or on a volume of
    a storage or distribution medium, does not as a whole count as a
    Modified Version of the Document, provided no compilation
    copyright is claimed for the compilation.  Such a compilation is
    called an "aggregate", and this License does not apply to the
    other self-contained works thus compiled with the Document, on
    account of their being thus compiled, if they are not themselves
    derivative works of the Document.</para>

    <para>If the Cover Text requirement of section 3 is applicable to
    these copies of the Document, then if the Document is less than
    one quarter of the entire aggregate, the Document's Cover Texts
    may be placed on covers that surround only the Document within the
    aggregate.  Otherwise they must appear on covers around the whole
    aggregate.</para>
  </sect1>

  <sect1 id="gfdl-8">
    <title>TRANSLATION</title>

    <para>Translation is considered a kind of modification, so you may
    distribute translations of the Document under the terms of section
    4.  Replacing Invariant Sections with translations requires
    special permission from their copyright holders, but you may
    include translations of some or all Invariant Sections in addition
    to the original versions of these Invariant Sections.  You may
    include a translation of this License provided that you also
    include the original English version of this License.  In case of
    a disagreement between the translation and the original English
    version of this License, the original English version will
    prevail.</para>
  </sect1>

  <sect1 id="gfdl-9">
    <title>TERMINATION</title>
    
    <para>You may not copy, modify, sublicense, or distribute the
    Document except as expressly provided for under this License.  Any
    other attempt to copy, modify, sublicense or distribute the
    Document is void, and will automatically terminate your rights
    under this License.  However, parties who have received copies, or
    rights, from you under this License will not have their licenses
    terminated so long as such parties remain in full
    compliance.</para>
  </sect1>

  <sect1 id="gfdl-10">
    <title>FUTURE REVISIONS OF THIS LICENSE</title>

    <para>The Free Software Foundation may publish new, revised
    versions of the GNU Free Documentation License from time to time.
    Such new versions will be similar in spirit to the present
    version, but may differ in detail to address new problems or
    concerns.  See <ulink
    url="http://www.gnu.org/copyleft/">http://www.gnu.org/copyleft/</ulink>.</para>

    <para>Each version of the License is given a distinguishing
    version number.  If the Document specifies that a particular
    numbered version of this License "or any later version" applies to
    it, you have the option of following the terms and conditions
    either of that specified version or of any later version that has
    been published (not as a draft) by the Free Software Foundation.
    If the Document does not specify a version number of this License,
    you may choose any version ever published (not as a draft) by the
    Free Software Foundation.</para>
  </sect1>

  <sect1 id="gfdl-11">
    <title>How to use this License for your documents</title>

    <para>To use this License in a document you have written, include
    a copy of the License in the document and put the following
    copyright and license notices just after the title page:</para>

<blockquote><para>
      Copyright (c)  YEAR  YOUR NAME.
      Permission is granted to copy, distribute and/or modify this document
      under the terms of the GNU Free Documentation License, Version 1.1
      or any later version published by the Free Software Foundation;
      with the Invariant Sections being LIST THEIR TITLES, with the
      Front-Cover Texts being LIST, and with the Back-Cover Texts being LIST.
      A copy of the license is included in the section entitled "GNU
      Free Documentation License".
</para></blockquote>

    <para>If you have no Invariant Sections, write "with no Invariant
    Sections" instead of saying which ones are invariant.  If you have
    no Front-Cover Texts, write "no Front-Cover Texts" instead of
    "Front-Cover Texts being LIST"; likewise for Back-Cover
    Texts.</para>

    <para>If your document contains nontrivial examples of program
    code, we recommend releasing these examples in parallel under your
    choice of free software license, such as the GNU General Public
    License, to permit their use in free software.</para>
  </sect1>

</appendix>

</book>



