source: archive/lxdm.xml

<?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"?>


  <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>

    &lfs120_checked;

    <note>
      <para>
        The <application>lxdm</application> display manager does not support
        wayland based window managers such as <application>plasma-wayland</application>
        or <application>gnome-wayland</application>.
      </para>
    </note>

    <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 role="nodep" linkend="polkit-gnome"/>
    </para>

    <bridgehead renderas="sect4">Optional</bridgehead>
    <para role="optional">
      <xref linkend="gtk3"/>
    </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><phrase revision="sysv">Boot Script</phrase>
             <phrase revision="systemd">Systemd Unit</phrase></title>

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

      <para revision="sysv">
        To start <command>lxdm</command> automatically when the system is
        switched to runlevel 5, install the
        <filename>/etc/rc.d/init.d/xdm</filename> script and the
        <filename>/etc/sysconfig/xdm</filename> configuration file
        included in the <xref linkend="bootscripts"/> package
        and adjust <filename>/etc/inittab</filename> by running
        as the <systemitem class="username">root</systemitem> user:
      </para>

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

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

<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>
        The <command>lxdm</command> greeter can be started from the command
        line as the <systemitem class="username">root</systemitem> user:
      </para>

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

      <para>
        Alternatively the runlevel can be permanently set to 5, starting the
        <command>lxdm</command> greeter screen automatically, by modifying
        <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>

      <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>

  <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"?>

      <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>