source: archive/sddm.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 sddm-download-http "https://github.com/sddm/sddm/releases/download/v&sddm-version;/sddm-&sddm-version;.tar.xz">
  <!ENTITY sddm-download-ftp  " ">
  <!ENTITY sddm-md5sum        "b41182cc9d53d75485c112ab82dc95d0">
  <!ENTITY sddm-size          "3.2 MB">
  <!ENTITY sddm-buildsize     "20 MB">
  <!ENTITY sddm-time          "0.6 SBU ">
]>

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


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

  <indexterm zone="sddm">
    <primary sortas="a-SDDM">SDDM</primary>
  </indexterm>

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

    <para>
      The <application>SDDM</application> package contains a lightweight
      display manager based upon <application>Qt</application> and QML.
    </para>

    &lfs81_checked;

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

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

    <bridgehead renderas="sect4">Required</bridgehead>
    <para role="required">
      <xref linkend="cmake"/>,
      <xref linkend="extra-cmake-modules"/> and
      <xref linkend="qt5"/>
    </para>

    <bridgehead renderas="sect4">Recommended</bridgehead>
    <para role="recommended">
      <xref linkend="linux-pam"/> and
      <xref linkend="upower"/>
    </para>

    <bridgehead renderas="sect4">Optional</bridgehead>
    <para role="optional">
      <xref linkend="docutils"/> (for the man pages)
    </para>

    <bridgehead renderas="sect4" revision="sysv">Runtime Dependency</bridgehead>
    <para role="required" revision="sysv">
      <xref role="runtime" linkend="consolekit"/>
    </para>

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

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

    <para>
      First, create a dedicated user and group to take
      control of the <command>sddm</command> daemon after it is
      started. Issue the following commands as the
      <systemitem class="username">root</systemitem> user:
    </para>

<screen role="root"><userinput>groupadd -g 64 sddm &amp;&amp;
useradd  -c "SDDM Daemon" \
         -d /var/lib/sddm \
         -u 64 -g sddm    \
         -s /bin/false sddm</userinput></screen>

    <para revision="sysv">
      Next, fix the application to start <command>upowerd</command>,
      if necessary, and after login, start the session with
      <command>ck-launch-session</command>:
    </para>

<screen revision="sysv"><userinput>sed -e '/UPOWER_SERVICE)/ s:^://:' \
    -i src/daemon/PowerManager.cpp &amp;&amp;

sed -e '/\$@$/s/exec/&amp; ck-launch-session/' \
    -i data/scripts/Xsession</userinput></screen>

    <para revision="sysv">
      For sddm-0.16.0, ConsoleKit support has been added, but is broken. Remove
      it with:
    </para>
<!-- This removes also logind support. Hopefully should be fixed for next
     version -->
<screen revision="sysv"><userinput>sed -e '/available.*true/s/true/false/' \
    -i src/daemon/LogindDBusTypes.cpp</userinput></screen>

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

<screen revision="sysv"><userinput>mkdir build &amp;&amp;
cd    build &amp;&amp;

cmake -DCMAKE_INSTALL_PREFIX=/usr \
      -DCMAKE_BUILD_TYPE=Release  \
      -DENABLE_JOURNALD=OFF       \
      -DDBUS_CONFIG_FILENAME=sddm_org.freedesktop.DisplayManager.conf \
      -Wno-dev .. &amp;&amp;
make</userinput></screen>

<screen revision="systemd"><userinput>mkdir build &amp;&amp;
cd    build &amp;&amp;

cmake -DCMAKE_INSTALL_PREFIX=/usr \
      -DCMAKE_BUILD_TYPE=Release  \
      -Wno-dev .. &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 &amp;&amp;
install -v -dm755 -o sddm -g sddm /var/lib/sddm</userinput></screen>

  </sect2>

  <sect2 role="commands">
    <title>Command Explanations</title>

    <para>
      <parameter>-DCMAKE_BUILD_TYPE=Release</parameter>: This switch is used to
      apply additional compiler optimizations.
    </para>

    <para revision="sysv">
      <parameter>-DENABLE_JOURNALD=OFF</parameter>: This switch is used because
      this version of BLFS does not support <application>systemd</application>.
    </para>

    <para revision="sysv">
      <parameter>-DDBUS_CONFIG_FILENAME=sddm_org.freedesktop.DisplayManager.conf</parameter>:
      This switch prevents the file <filename>
      /etc/dbus-1/system.d/org.freedesktop.DisplayManager.conf</filename> from
      being overwritten, as it may be used by other DM's.
    </para>

    <para>
      <option>-DBUILD_MAN_PAGES=ON</option>: This switch may be used if you want
      the man pages to be installed. Notice that you need
      <xref linkend="docutils"/> to build them.
    </para>

  </sect2>

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

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

      <para>
        /usr/lib/sddm/sddm.conf.d/*, /etc/sddm.conf.d/*, and /etc/sddm.conf
      </para>

      <indexterm zone="sddm sddm-config">
        <primary sortas="e-usr-lib-sddm.conf.d">/usr/lib/sddm/sddm.conf.d</primary>
      </indexterm>

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

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

      <para>
        Only <filename>/etc/sddm.conf</filename> is installed, but the
        configuration files are read in the following order: all files in
        <filename class="directory">/usr/lib/sddm/sddm.conf.d</filename> in
        alphabetical order, then all files in <filename class="directory">
        /etc/sddm.conf.d</filename> in alphabetical order, and finally
        <filename>/etc/sddm.conf</filename>.
      </para>

      <para>
        Normally, you want to edit this file. For example, if Xorg is installed
        in /opt, use your preferred editor as the <systemitem
        class="username">root</systemitem> user to replace the default
        <emphasis>XauthPath</emphasis> value by
        <emphasis>/opt/xorg/bin/xauth</emphasis>. Or, as the <systemitem
        class="username">root</systemitem> user, issue:
      </para>

<screen role="root"><userinput>sed -e '/ServerPath/ s|usr|opt/xorg|' \
    -i.orig /etc/sddm.conf</userinput></screen>

      <para>
        This command will do the substitution and create a copy of the original
        file with name <filename>/etc/sddm.conf.orig</filename>.
      </para>

      <para>
        From now on, we will describe how to modify configurations using sed.
        Of course, you may instead use your preferred editor as the <systemitem
        class="username">root</systemitem> user.
      </para>

      <para>
        For security reasons, you normally want the default
        <emphasis>ServerArguments=-nolisten tcp</emphasis>, unless a remote
        machine needs access to the local X server. In that case, as the
        <systemitem class="username">root</systemitem> user, issue:
      </para>

<screen role="root"><userinput>sed -e 's/-nolisten tcp//'\
    -i /etc/sddm.conf</userinput></screen>

      <para>
        Desktop (Notebook) users, normally wish the Num Lock key on (off).  For
        that, as the <systemitem
        class="username">root</systemitem> user, issue:
      </para>

<screen role="root"><userinput>sed -e 's/\"none\"/\"on\"/' \
    -i /etc/sddm.conf</userinput></screen>

      <para>
        for Desktop users. For Notebook users, replace \"on\" by \"off\",
        in the command above.
      </para>

   </sect3>

    <sect3 id="sddm-bootscript">
      <title>Boot Script</title>

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

      <indexterm zone="sddm sddm-bootscript">
        <primary sortas="f-sddm">sddm</primary>
      </indexterm>

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

<screen role="root" revision="systemd"><userinput>systemctl enable sddm</userinput></screen>

    </sect3>

    <sect3>
      <title>Linux PAM Configuration</title>

      <para>
        If you have built <application>SDDM</application>
        with <application>Linux PAM</application> support,
        create the necessary configuration files by running
        the following commands as the <systemitem
        class="username">root</systemitem> user:
      </para>

<screen role="root" revision="sysv"><userinput>cat &gt; /etc/pam.d/sddm &lt;&lt; "EOF"
<literal># Begin /etc/pam.d/sddm

auth     requisite      pam_nologin.so
auth     required       pam_env.so

auth     required       pam_succeed_if.so uid &gt;= 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/sddm</literal>
EOF

cat &gt; /etc/pam.d/sddm-autologin &lt;&lt; "EOF"
<literal># Begin /etc/pam.d/sddm-autologin

auth     requisite      pam_nologin.so
auth     required       pam_env.so

auth     required       pam_succeed_if.so uid &gt;= 1000 quiet
auth     required       pam_permit.so

account  include        system-account

password required       pam_deny.so

session  required       pam_limits.so
session  include        system-session

# End /etc/pam.d/sddm-autologin</literal>
EOF

cat &gt; /etc/pam.d/sddm-greeter &lt;&lt; "EOF"
<literal># Begin /etc/pam.d/sddm-greeter

auth     required       pam_env.so
auth     required       pam_permit.so

account  required       pam_permit.so
password required       pam_deny.so
session  required       pam_unix.so
-session optional       pam_systemd.so

# End /etc/pam.d/sddm-greeter</literal>
EOF</userinput></screen>

<screen role="root" revision="systemd"><userinput>cat &gt; /etc/pam.d/sddm &lt;&lt; "EOF" &amp;&amp;
<literal># Begin /etc/pam.d/sddm

auth     requisite      pam_nologin.so
auth     required       pam_env.so

auth     required       pam_succeed_if.so uid &gt;= 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/sddm</literal>
EOF

cat &gt; /etc/pam.d/sddm-autologin &lt;&lt; "EOF" &amp;&amp;
<literal># Begin /etc/pam.d/sddm-autologin

auth     requisite      pam_nologin.so
auth     required       pam_env.so

auth     required       pam_succeed_if.so uid &gt;= 1000 quiet
auth     required       pam_permit.so

account  include        system-account

password required       pam_deny.so

session  required       pam_limits.so
session  include        system-session

# End /etc/pam.d/sddm-autologin</literal>
EOF

cat &gt; /etc/pam.d/sddm-greeter &lt;&lt; "EOF"
<literal># Begin /etc/pam.d/sddm-greeter

auth     required       pam_env.so
auth     required       pam_permit.so

account  required       pam_permit.so
password required       pam_deny.so
session  required       pam_unix.so
-session optional       pam_systemd.so

# End /etc/pam.d/sddm-greeter</literal>
EOF</userinput></screen>

    </sect3>

    <sect3 id="sddm-init" revision="sysv">
      <title>Starting sddm</title>

      <para>
        If the sddm bootscript has been installed, start sddm by running, as the
        <systemitem class="username">root</systemitem> user:
      </para>

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

      <para>
        By convention, X should be executed at runlevel 5, consequently, the
        same is true for <application>sddm</application>. However, LFS default
        runlevel is 3. Changing to runlevel 5, from a console terminal, as
        <systemitem class="username">root</systemitem> user, starts the
        <command>sddm</command> bootscript, bringing up 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>sddm</command> greeter screen automatically, 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>

    </sect3>

    <sect3 id="sddm-sessions">
      <title>Available Sessions</title>

      <para>
        The greeter offers a list of available sessions,
        depending on the Window Managers and Desktop Environments installed. The
        list includes sessions which have a corresponding
        <filename>.desktop</filename> file installed under
        <filename class="directory">/usr/share/xsessions</filename>. Most of the
        Window Managers and Desktop Environments automatically provide those
        files, but if necessary, you may include a custom one.
      </para>

    </sect3>

    <sect3 id="sddm-themes">
      <title>Themes</title>

      <para>
        Three themes are installed at <filename class="directory">
        /usr/share/sddm/themes</filename>:
        elarun,
        maldives, and
        maya.
        There is also a default theme, which is not present in that directory.
        You can install other themes in that directory. In order to change the
        theme, you need to edit <filename>/etc/sddm.conf</filename>,
        to change the default (empty) theme, replacing <quote>Current=</quote>
        with <quote>Current=&lt;new theme&gt;</quote>, e.g.
        <quote>Current=maldives</quote>.
      </para>

      <para>
        In order to see the theme without leaving the session, issue:
      </para>

<screen><userinput>sddm-greeter --test-mode --theme <replaceable>&lt;theme path&gt;</replaceable></userinput></screen>

    </sect3>

    <sect3 id="sddm-Issues">
      <title>Known Issues</title>

      <para>
        This application works well, but there are issues. You find the
        mainstream known issues at
        <ulink url="https://github.com/sddm/sddm/issues">Issues</ulink>.
        The BLFS development team have found some issues.
      </para>

      <note>
        <para>
          In the next couple of paragraphs, due to a problem with sddm-greeter,
          we mention how to define the keyboard used there. Notice that this is
          also the keyboard that will be used in the X session, unless there is
          a configuration in the Desktop Environment or in the Window Manager
          overriding it, afterwards.
        </para>
      </note>

      <para>
        Keyboard selection: the greeter shows a double question mark or the
        wrong keyboard. When you start to type the password or user name
        (depending on the theme, only password), the right keyboard selection
        magically appears. Optionally, a workaround is to include the keyboard
        list in <command>/usr/share/sddm/scripts/Xsetup</command> script, as the
        <systemitem class="username">root</systemitem> user:
      </para>

<screen role="root"><userinput>echo 'setxkbmap <replaceable>"&lt;your keyboard comma separated list&gt;"</replaceable>' &gt;&gt; \
     /usr/share/sddm/scripts/Xsetup</userinput></screen>

      <para>
        E.g. <command>echo 'setxkbmap "fr,gb,br,us"' &gt;&gt;
        /usr/share/sddm/scripts/Xsetup</command>. A very accurate definition
        of the keyboard(s) is possible, for example: <command>echo 'setxkbmap
        -model pc105 -layout br,us -variant abnt2,dvorak -keycodes evdev'
        &gt;&gt; /usr/share/sddm/scripts/Xsetup</command>. See man setxkbmap.
      </para>

      <para>
        Dircolors: the <filename>/etc/dircolors</filename> file is not
        honoured. Particularly, the compressed files are not displayed in red
        colour. If this happens, a workaround is to issue, as the
        <systemitem class="username">root</systemitem> user:
      </para>

<screen role="root"><userinput>echo "source /etc/profile.d/dircolors.sh" &gt;&gt; /etc/bashrc</userinput></screen>

      <para>
        It has been reported that problems may happen with this package, if
        Xorg is installed with a prefix other than <filename
        class="directory">/usr</filename>. So far, BLFS development team has
        not hit any problem, in this case.
      </para>

    </sect3>

  </sect2>

  <sect2 role="content">
    <title>Contents</title>

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

      <seglistitem>
        <seg>
          sddm and sddm-greeter
        </seg>
        <seg>
          None
        </seg>
        <seg>
          $QT5DIR/qml/SddmComponents,
          /usr/share/sddm, and
          /var/lib/sddm
        </seg>
      </seglistitem>
    </segmentedlist>

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

      <varlistentry id="sddm-prog">
        <term><command>sddm</command></term>
        <listitem>
          <para>
            is a display and login manager based on
            <application>Qt</application> libraries.
          </para>
          <indexterm zone="sddm sddm-prog">
            <primary sortas="b-sddm">sddm</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="sddm-greeter">
        <term><command>sddm-greeter</command></term>
        <listitem>
          <para>
            is an auxiliary process that displays the greeter,
            a graphical user interface that performs user
            authentication and initiates the selected window manager
            or display environment.
          </para>
          <indexterm zone="sddm sddm-greeter">
            <primary sortas="b-sddm-greeter">sddm-greeter</primary>
          </indexterm>
        </listitem>
      </varlistentry>

    </variablelist>

  </sect2>

</sect1>