source: x/dm/lxdm.xml@ c6661e4

<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
   "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
  <!ENTITY % general-entities SYSTEM "../../general.ent">
  %general-entities;

  <!ENTITY lxdm-download-http "&sourceforge-dl;/lxdm/lxdm-&lxdm-version;.tar.xz">
  <!ENTITY lxdm-download-ftp  " ">
  <!ENTITY lxdm-md5sum        "061caae432634e6db38bbdc84bc6ffa0">
  <!ENTITY lxdm-size          "236 KB">
  <!ENTITY lxdm-buildsize     "5.6 MB">
  <!ENTITY lxdm-time          "less than 0.1 SBU ">
]>

<sect1 id="lxdm" xreflabel="lxdm-&lxdm-version;">
  <?dbhtml filename="lxdm.html"?>

  <sect1info>
    <othername>$LastChangedBy$</othername>
    <date>$Date$</date>
  </sect1info>

  <title>lxdm-&lxdm-version;</title>

  <indexterm zone="lxdm">
    <primary sortas="a-lxdm">lxdm</primary>
  </indexterm>

  <sect2 role="package">
    <title>Introduction to LXDM</title>

    <para>
      The <application>LXDM</application> is a lightweight Display Manager for
      the <application>LXDE</application> desktop. It can also be used as an
      alternative to other Display Managers such as
      <application>GNOME's</application> <application>GDM</application> or
      <application>LightDM</application>.
    </para>

    &lfs90_checked;

    <bridgehead renderas="sect3">Package Information</bridgehead>
    <itemizedlist spacing="compact">
      <listitem>
        <para>
          Download (HTTP): <ulink url="&lxdm-download-http;"/>
        </para>
      </listitem>
      <listitem>
        <para>
          Download (FTP): <ulink url="&lxdm-download-ftp;"/>
        </para>
      </listitem>
      <listitem>
        <para>
          Download MD5 sum: &lxdm-md5sum;
        </para>
      </listitem>
      <listitem>
        <para>
          Download size: &lxdm-size;
        </para>
      </listitem>
      <listitem>
        <para>
          Estimated disk space required: &lxdm-buildsize;
        </para>
      </listitem>
      <listitem>
        <para>
          Estimated build time: &lxdm-time;
        </para>
      </listitem>
    </itemizedlist>

    <bridgehead renderas="sect3">LXDM Dependencies</bridgehead>

    <bridgehead renderas="sect4">Required</bridgehead>
    <para role="required">
      <xref linkend="gtk2"/>,
      <xref linkend="iso-codes"/>, and
      <xref role="runtime" linkend="librsvg"/> (runtime, for default theme
      background)
    </para>

    <bridgehead renderas="sect4">Recommended</bridgehead>
    <para role="recommended">
     <xref linkend="lxsession"/> (for <application>lxpolkit</application>) or
     <xref linkend="polkit-gnome"/>
    </para>

    <bridgehead renderas="sect4">Optional</bridgehead>
    <para role="optional">
      <xref linkend="gtk3"/>
    </para>

    <para condition="html" role="usernotes">
      User Notes: <ulink url="&blfs-wiki;/lxdm"/>
    </para>
  </sect2>

  <sect2 role="installation">
    <title>Installation of LXDM</title>

    <para>
      First, some fixes.
    </para>

<screen><userinput>cat &gt; pam/lxdm &lt;&lt; "EOF"
<literal># Begin /etc/pam.d/lxdm

auth     requisite      pam_nologin.so
auth     required       pam_env.so
auth     required       pam_succeed_if.so uid >= 1000 quiet
auth     include        system-auth

account  include        system-account

password include        system-password

session  required       pam_limits.so
session  include        system-session

# End /etc/pam.d/lxdm</literal>
EOF

sed -i 's:sysconfig/i18n:profile.d/i18n.sh:g' data/lxdm.in &amp;&amp;
sed -i 's:/etc/xprofile:/etc/profile:g' data/Xsession &amp;&amp;
sed -e 's/^bg/#&amp;/'        \
    -e '/reset=1/ s/# //' \
    -e 's/logou$/logout/' \
    -e "/arg=/a arg=$XORG_PREFIX/bin/X" \
    -i data/lxdm.conf.in</userinput></screen>

    <para>
      Install <application>LXDM</application> by running the following
      commands:
    </para>

<screen revision="sysv"><userinput>./configure --prefix=/usr     \
            --sysconfdir=/etc \
            --with-pam        \
            --with-systemdsystemunitdir=no &amp;&amp;
make</userinput></screen>

<screen revision="systemd"><userinput>./configure --prefix=/usr     \
            --sysconfdir=/etc \
            --with-pam        \
            --with-systemdsystemunitdir=/lib/systemd/system &amp;&amp;
make</userinput></screen>

    <para>
      This package does not come with a test suite.
    </para>

    <para>
      Now, as the <systemitem class="username">root</systemitem> user:
    </para>

<screen role="root"><userinput>make install</userinput></screen>

  </sect2>

  <!--Optional section-->
  <sect2 role="commands">
    <title>Command Explanations</title>

    <para>
      <command>cat &gt; pam/lxdm &lt;&lt; "EOF" ...</command>: Replace default
      <filename>/etc/pam.d/lxdm</filename> by another one appropriate for BLFS.
    </para>

    <para>
      <command>sed -i ... data/lxdm.conf.in</command>: Modifications in the
      default configuration:
      (1) fix the background to the default one;
      (2) restart X when session is close;
      (3) typo; and
      (4) include <envar>XORG_PREFIX</envar>, which may be different from
      <filename class="directory">/usr</filename>.
    </para>

    <para>
      <command>sed -i ... data/Xsession</command>: Source
      <filename>/etc/profile</filename>, instead of other file, according to
      BLFS standard.
    </para>

    <para>
      <command>sed -i ... data/lxdm.in</command>: Fix greeter's locale for BLFS
      specification.
    </para>

    <para>
      <parameter>--with-pam</parameter>: This parameter enables use of pam
      authentication.
    </para>

    <para revision="sysv">
      <parameter>--with-systemdsystemunitdir=no</parameter>: BLFS does not
      support systemd.
    </para>

  </sect2>

  <sect2 role="configuration">
    <title>Configuring LXDM</title>

   <sect3 id="lxdm-config">
      <title>Config Files</title>

      <para>
        <filename>/etc/lxdm/lxdm.conf</filename>
      </para>

      <indexterm zone="lxdm lxdm-config">
        <primary sortas="e-etc-lxdm-lxdm.conf">/etc/lxdm/lxdm.conf</primary>
      </indexterm>

    </sect3>

   <sect3 id="lxdm-init">
      <title>Boot Script</title>

      <para revision="sysv">
        Install the <filename>/etc/rc.d/init.d/lxdm</filename> init script from
        the <xref linkend="bootscripts"/> package.
      </para>

      <para revision="systemd">
        To start <application>LXDM</application> at boot execute the following
        command as the <systemitem class="username">root</systemitem> user:
      </para>

      <indexterm zone="lxdm lxdm-init">
        <primary sortas="f-lxdm">lxdm</primary>
      </indexterm>

<screen role="root" revision="sysv"><userinput>make install-lxdm</userinput></screen>
<screen role="root" revision="systemd"><userinput>systemctl enable lxdm</userinput></screen>

    </sect3>

    <sect3>
      <title>Configuration Information</title>

      <para>
        The LXDM daemon configuration file
        (<filename>/etc/lxdm/lxdm.conf</filename>) specifies options that
        include numlock on/off, background image (bg), session, etc.  You can
        set a default session by uncommenting the line:
        session=/usr/bin/startlxde and replacing <command>startlxde</command>
        with your session of choice. For <application>GNOME</application>
        session=/usr/bin/gnome-session.  For <application>OPENBOX</application>
        session=/usr/bin/openbox-session and for
        <application>XFCE</application> session=/usr/bin/startxfce4.
      </para>

      <para>
        It is also possible to set the preferred session on a per-user basis by
        editing the ~/.dmrc file for each user and adding:
        <screen><literal>[Desktop]
        Session=xfce</literal></screen>
      </para>

      <para>
        You can replace the default dummy face in the greeting screen by another
        image representing your user. For that, copy or symlink the desired
        image to your home directory with the name <filename>.face</filename>.
      </para>

    </sect3>

    <sect3 revision="sysv">
      <title>Starting lxdm</title>

      <para>
        You can manually start <command>lxdm</command>, e.g, if the bootscript
        has been installed, by running, as <systemitem
        class="username">root</systemitem> user:
      </para>

<screen role="root"><userinput>/etc/rc.d/init.d/lxdm start</userinput></screen>

      <para>
        By convention, X should be executed at runlevel 5, consequently, the
        same is true for <application>lxdm</application>. However, the LFS default
        runlevel is 3. Changing to runlevel 5, from the console (as
        <systemitem class="username">root</systemitem> user) starts the
        <command>lxdm</command> bootscript and presents the
        greeter screen:
      </para>

<screen role="root"><userinput>init 5</userinput></screen>

      <para>
          In order to permanently set the default to 5, starting the
          <command>lxdm</command> greeter screen automatically, you can modify
          <filename>/etc/inittab</filename>. As the  <systemitem
          class="username">root</systemitem> user:
      </para>

<screen role="root"><userinput>cp -v /etc/inittab{,-orig} &amp;&amp;
sed -i '/initdefault/ s/3/5/' /etc/inittab</userinput></screen>

      <para>
          You should also disable default elogind power management:
      </para>
 
<screen role="root"><userinput>cat &gt;&gt; /etc/elogind/logind.conf &lt;&lt; "EOF"
<literal>AllowSuspend=no
AllowHibernation=no</literal>
EOF</userinput></screen>

      <note>
      <para>
          One important script, executed after login is
          <filename>/etc/lxdm/Xsession</filename> which we have fixed to fit
          BLFS specifications.
      </para>
      </note>

    </sect3>

  </sect2>
  <!--Required section-->
  <sect2 role="content">
    <title>Contents</title>

    <segmentedlist>
      <segtitle>Installed Programs</segtitle>
      <segtitle>Installed Libraries</segtitle>
      <segtitle>Installed Directories</segtitle>

      <seglistitem>
        <seg>
          lxdm, lxdm-binary and lxdm-config
        </seg>
        <seg>
          None
        </seg>
        <seg>
          /etc/lxdm and
          /usr/share/lxdm
        </seg>
      </seglistitem>
    </segmentedlist>

    <variablelist>
      <bridgehead renderas="sect3">Short Descriptions</bridgehead>
      <?dbfo list-presentation="list"?>
      <?dbhtml list-presentation="table"?>

      <!-- If the program or library name conflicts (is the same) as the
      package name, add -prog or -lib to the varlistentry entity id
      and the 2nd entry of the indexterm zone entity -->

      <varlistentry id="lxdm-prog">
        <term><command>lxdm</command></term>
        <listitem>
          <para>
            is a script to execute <command>lxdm-binary</command>
          </para>
          <indexterm zone="lxdm lxdm-prog">
            <primary sortas="b-lxdm">lxdm</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="lxdm-binary">
        <term><command>lxdm-binary</command></term>
        <listitem>
          <para>
             is the actual Display Manager; needs to be executed with option
             <option>-d</option> to daemonize
          </para>
          <indexterm zone="lxdm lxdm-binary">
            <primary sortas="b-lxdm-binary">lxdm-binary</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="lxdm-config-prog">
        <term><command>lxdm-config</command></term>
        <listitem>
          <para>
            is a graphical customizing program
          </para>
          <indexterm zone="lxdm lxdm-config">
            <primary sortas="b-lxdm">lxdm</primary>
          </indexterm>
        </listitem>
      </varlistentry>

    </variablelist>

  </sect2>

</sect1>