1 | <?xml version="1.0" encoding="UTF-8"?>
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2 | <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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3 | "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
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4 | <!ENTITY % general-entities SYSTEM "../../general.ent">
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5 | %general-entities;
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6 |
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7 | <!-- lightdm -->
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8 | <!ENTITY lightdm-download-http "https://github.com/CanonicalLtd/lightdm/releases/download/&lightdm-version;/lightdm-&lightdm-version;.tar.xz">
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9 | <!ENTITY lightdm-download-ftp " ">
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10 | <!ENTITY lightdm-md5sum "e62a5da6c35f612e4d9575eda5c8d467">
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11 | <!ENTITY lightdm-size "508 KB">
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12 | <!ENTITY lightdm-buildsize "20 MB">
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13 | <!ENTITY lightdm-time "0.2 SBU ">
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14 |
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15 | <!-- lightdm-gtk-greeter -->
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16 | <!ENTITY lightdm-gtk-greeter-download-http "https://github.com/Xubuntu/lightdm-gtk-greeter/releases/download/lightdm-gtk-greeter-&lightdm-gtk-greeter-version;/lightdm-gtk-greeter-&lightdm-gtk-greeter-version;.tar.gz">
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17 | <!ENTITY lightdm-gtk-greeter-download-ftp " ">
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18 | <!ENTITY lightdm-gtk-greeter-md5sum "35752d730f39293c2bbe884ef6963830">
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19 | <!ENTITY lightdm-gtk-greeter-size "592 KB">
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20 | <!ENTITY lightdm-gtk-greeter-buildsize "5.2 MB">
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21 | <!ENTITY lightdm-gtk-greeter-time "less than 0.1 SBU ">
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22 | ]>
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23 |
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24 | <sect1 id="lightdm" xreflabel="lightdm-&lightdm-version;">
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25 | <?dbhtml filename="lightdm.html"?>
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26 |
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27 |
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28 | <title>lightdm-&lightdm-version;</title>
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29 |
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30 | <indexterm zone="lightdm">
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31 | <primary sortas="a-lightdm">lightdm</primary>
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32 | </indexterm>
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33 |
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34 | <sect2 role="package">
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35 | <title>Introduction to Lightdm</title>
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36 |
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37 | <para>
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38 | The <application>lightdm</application> package contains a lightweight
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39 | display manager based upon GTK.
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40 | </para>
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41 |
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42 | &lfs122_checked;
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43 |
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44 | <bridgehead renderas="sect3">Lightdm Package Information</bridgehead>
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45 | <itemizedlist spacing="compact">
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46 | <listitem>
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47 | <para>
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48 | Download (HTTP): <ulink url="&lightdm-download-http;"/>
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49 | </para>
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50 | </listitem>
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51 | <listitem>
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52 | <para>
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53 | Download (FTP): <ulink url="&lightdm-download-ftp;"/>
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54 | </para>
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55 | </listitem>
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56 | <listitem>
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57 | <para>
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58 | Download MD5 sum: &lightdm-md5sum;
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59 | </para>
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60 | </listitem>
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61 | <listitem>
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62 | <para>
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63 | Download size: &lightdm-size;
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64 | </para>
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65 | </listitem>
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66 | <listitem>
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67 | <para>
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68 | Estimated disk space required: &lightdm-buildsize;
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69 | </para>
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70 | </listitem>
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71 | <listitem>
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72 | <para>
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73 | Estimated build time: &lightdm-time;
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74 | </para>
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75 | </listitem>
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76 | </itemizedlist>
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77 |
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78 | <bridgehead renderas="sect3">Additional download</bridgehead>
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79 |
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80 | <note>
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81 | <para>
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82 | The greeter is a program to present a graphical login screen. There
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83 | are several alternative greeters, but the gtk+ package is the reference
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84 | implementation. For a list of other greeters, see <ulink
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85 | url="https://en.wikipedia.org/wiki/LightDM"/>.
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86 | </para>
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87 | </note>
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88 |
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89 | <itemizedlist spacing="compact">
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90 | <listitem>
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91 | <para>
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92 | Download (HTTP): <ulink url="&lightdm-gtk-greeter-download-http;"/>
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93 | </para>
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94 | </listitem>
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95 | <listitem>
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96 | <para>
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97 | Download (FTP): <ulink url="&lightdm-gtk-greeter-download-ftp;"/>
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98 | </para>
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99 | </listitem>
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100 | <listitem>
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101 | <para>
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102 | Download MD5 sum: &lightdm-gtk-greeter-md5sum;
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103 | </para>
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104 | </listitem>
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105 | <listitem>
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106 | <para>
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107 | Download size: &lightdm-gtk-greeter-size;
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108 | </para>
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109 | </listitem>
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110 | <listitem>
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111 | <para>
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112 | Estimated disk space required: &lightdm-gtk-greeter-buildsize;
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113 | </para>
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114 | </listitem>
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115 | <listitem>
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116 | <para>
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117 | Estimated build time: &lightdm-gtk-greeter-time;
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118 | </para>
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119 | </listitem>
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120 | </itemizedlist>
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121 |
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122 | <bridgehead renderas="sect3">Lightdm Dependencies</bridgehead>
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123 |
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124 | <bridgehead renderas="sect4">Required</bridgehead>
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125 | <para role="required">
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126 | <xref linkend="exo"/> (for the greeter),
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127 | <!-- required by exo <xref linkend="gtk3"/>, -->
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128 | <xref linkend="libgcrypt"/>,
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129 | <xref linkend="itstool"/>,
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130 | <xref linkend="linux-pam"/>, and
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131 | <xref role='runtime' linkend='xorg-server'/> (Runtime)
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132 | </para>
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133 |
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134 | <bridgehead renderas="sect4">Recommended</bridgehead>
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135 | <para role="recommended">
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136 | &gobject-introspection;,
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137 | <xref linkend="libxklavier"/>, and
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138 | <xref linkend="vala"/>
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139 | </para>
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140 |
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141 | <bridgehead renderas="sect4">Optional</bridgehead>
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142 | <para role="optional">
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143 | <xref role="runtime" linkend="accountsservice"/> (run time),
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144 | <xref linkend="at-spi2-core"/>,
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145 | <xref linkend="gtk-doc"/>,
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146 | <ulink url="https://launchpad.net/ido">libido</ulink>, and
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147 | <ulink url="https://launchpad.net/libindicator">libindicator</ulink>
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148 |
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149 | </para>
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150 |
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151 | </sect2>
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152 |
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153 | <sect2 role="installation">
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154 | <title>Installation of Lightdm</title>
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155 |
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156 | <para>
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157 | First, create a dedicated user and group to take
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158 | control of the <command>lightdm</command> daemon after it is
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159 | started. Issue the following commands as the
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160 | <systemitem class="username">root</systemitem> user:
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161 | </para>
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162 |
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163 | <screen role="root"><userinput>groupadd -g 65 lightdm &&
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164 | useradd -c "Lightdm Daemon" \
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165 | -d /var/lib/lightdm \
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166 | -u 65 -g lightdm \
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167 | -s /bin/false lightdm</userinput></screen>
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168 |
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169 | <para revision="sysv">
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170 | Then change the <application>Linux-PAM</application> configuration files
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171 | so that <application>elogind</application> is used:
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172 | </para>
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173 |
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174 | <screen revision="sysv"><userinput>sed -i s/systemd/elogind/ data/pam/*</userinput></screen>
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175 |
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176 | <para>
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177 | Install <application>lightdm</application> by running the following
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178 | commands:
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179 | </para>
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180 |
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181 | <screen><userinput>./configure --prefix=/usr \
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182 | --libexecdir=/usr/lib/lightdm \
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183 | --localstatedir=/var \
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184 | --sbindir=/usr/bin \
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185 | --sysconfdir=/etc \
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186 | --disable-static \
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187 | --disable-tests \
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188 | --with-greeter-user=lightdm \
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189 | --with-greeter-session=lightdm-gtk-greeter \
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190 | --docdir=/usr/share/doc/lightdm-&lightdm-version; &&
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191 | make</userinput></screen>
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192 |
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193 | <para>
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194 | This package does not come with a test suite.
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195 | </para>
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196 |
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197 | <para>
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198 | Now, as the <systemitem class="username">root</systemitem> user:
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199 | </para>
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200 |
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201 | <screen role="root"><userinput>make install &&
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202 | cp tests/src/lightdm-session /usr/bin &&
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203 | sed -i '1 s/sh/bash --login/' /usr/bin/lightdm-session &&
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204 | rm -rf /etc/init &&
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205 | install -v -dm755 -o lightdm -g lightdm /var/lib/lightdm &&
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206 | install -v -dm755 -o lightdm -g lightdm /var/lib/lightdm-data &&
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207 | install -v -dm755 -o lightdm -g lightdm /var/cache/lightdm &&
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208 | install -v -dm770 -o lightdm -g lightdm /var/log/lightdm</userinput></screen>
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209 |
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210 | <para>
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211 | Now build the greeter:
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212 | </para>
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213 |
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214 | <screen><userinput>tar -xf ../lightdm-gtk-greeter-&lightdm-gtk-greeter-version;.tar.gz &&
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215 | cd lightdm-gtk-greeter-&lightdm-gtk-greeter-version; &&
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216 |
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217 | ./configure --prefix=/usr \
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218 | --libexecdir=/usr/lib/lightdm \
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219 | --sbindir=/usr/bin \
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220 | --sysconfdir=/etc \
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221 | --with-libxklavier \
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222 | --enable-kill-on-sigterm \
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223 | --disable-libido \
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224 | --disable-libindicator \
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225 | --disable-static \
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226 | --disable-maintainer-mode \
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227 | --docdir=/usr/share/doc/lightdm-gtk-greeter-&lightdm-gtk-greeter-version; &&
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228 | make</userinput></screen>
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229 |
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230 | <para>
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231 | Now, as the <systemitem class="username">root</systemitem> user:
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232 | </para>
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233 |
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234 | <screen role="root"><userinput>make install</userinput></screen>
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235 |
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236 | <note>
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237 | <para>
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238 | If you installed Xorg in /opt, you will need to create a symbolic
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239 | link so lightdm can find the Xorg server. As the
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240 | <systemitem class="username">root</systemitem> user:
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241 | </para>
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242 |
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243 | <screen role="nodump"><userinput>ln -sf /opt/xorg/bin/Xorg /usr/bin/X</userinput></screen>
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244 | </note>
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245 |
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246 |
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247 | </sect2>
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248 |
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249 | <sect2 role="commands">
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250 | <title>Command Explanations</title>
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251 | <para>
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252 |
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253 | <command>sed ... /usr/bin/lightdm-session</command>:
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254 | This command ensures that the initial login via the greeter sources
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255 | /etc/profile and ~/.bash_profile. Without this, commands that depend on
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256 | different environment variables may not work as expected.
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257 | </para>
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258 | <!--
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259 | <para>
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260 | <parameter>ITSTOOL=/bin/true</parameter>: although
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261 | <xref linkend="itstool"/> is not needed in a normal build,
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262 | <command>configure</command> throws an error if it is not found on the
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263 | system. This parameter prevents the error.
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264 | </para>
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265 |
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266 | <para>
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267 | <parameter>HAVE_EXO_CSOURCE=yes</parameter>: although
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268 | <command>exo-csource</command> is not needed in a normal build,
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269 | <command>configure</command> throws an error if it is not found on the
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270 | system. This parameter prevents the error.
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271 | </para>
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272 | -->
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273 | </sect2>
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274 |
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275 | <sect2 role="configuration">
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276 | <title>Configuring lightdm</title>
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277 |
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278 | <sect3 id="lightdm-config">
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279 | <title>Config Files</title>
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280 |
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281 | <para>
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282 | /etc/lightdm/{lightdm,users,keys,lightdm-gtk-greeter}.conf
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283 | </para>
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284 |
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285 | <para>
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286 | The configuration files offer many options. If, for instance, you have
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287 | a multiple monitor setup but prefer the login window to be displayed on
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288 | only one monitor, set 'active-monitor=<monitor-name>' in
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289 | <filename>lightdm-gtk-greeter.conf</filename>. For example you could
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290 | use <option>active-monitor=HDMI-1</option>. You can determine the
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291 | monitor-names with <command>xrandr --listmonitors</command>. Note that
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292 | the monitor names may change if you change the graphics driver
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293 | and you may have to adjust the configuration accordingly.
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294 | </para>
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295 |
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296 | <indexterm zone="lightdm lightdm-config">
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297 | <primary sortas="e-etc-lightdm-lightdm.conf">/etc/lightdm/lightdm.conf</primary>
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298 | </indexterm>
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299 |
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300 | <indexterm zone="lightdm lightdm-config">
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301 | <primary sortas="e-users.conf">/etc/lightdm/users.conf</primary>
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302 | </indexterm>
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303 |
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304 | <indexterm zone="lightdm lightdm-config">
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305 | <primary sortas="e-keys.conf">/etc/lightdm/keys.conf</primary>
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306 | </indexterm>
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307 |
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308 | <indexterm zone="lightdm lightdm-config">
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309 | <primary sortas="e-lightdm-gtk-greeter.conf">
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310 | /etc/lightdm/lightdm-gtk-greeter.conf</primary>
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311 | </indexterm>
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312 |
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313 | </sect3>
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314 |
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315 | <sect3 id="lightdm-bootscript">
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316 | <title><phrase revision="sysv">Boot Script</phrase>
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317 | <phrase revision="systemd">Systemd Unit</phrase></title>
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318 |
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319 | <indexterm zone="lightdm lightdm-bootscript">
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320 | <primary sortas="f-lightdm">lightdm</primary>
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321 | </indexterm>
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322 |
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323 | <para revision="sysv">
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324 | To start <command>lightdm</command> automatically when the system is
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325 | switched to runlevel 5, install the
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326 | <filename>/etc/rc.d/init.d/xdm</filename> script and the
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327 | <filename>/etc/sysconfig/xdm</filename> configuration file
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328 | included in the <xref linkend="bootscripts"/> package
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329 | and adjust <filename>/etc/inittab</filename> by running
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330 | as the <systemitem class="username">root</systemitem> user:
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331 | </para>
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332 |
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333 | <screen role="root" revision="sysv"><userinput>make install-lightdm</userinput></screen>
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334 |
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335 | <para revision="systemd">
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336 | Install the <filename>lightdm.service</filename> unit included in
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337 | the <xref linkend="systemd-units"/> package:
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338 | </para>
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339 |
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340 | <screen role="root" revision="systemd"><userinput>make install-lightdm</userinput></screen>
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341 |
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342 | </sect3>
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343 | <sect3 id="lightdm-init" revision="sysv">
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344 | <title>Starting lightdm</title>
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345 |
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346 | <para>
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347 | The <command>lightdm</command> greeter can be started from the
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348 | command line as the <systemitem class="username">root</systemitem>
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349 | user:
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350 | </para>
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351 |
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352 | <screen role="nodump"><userinput>telinit 5</userinput></screen>
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353 |
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354 | <!-- "make install-lightdm already does this already
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355 | <para>
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356 | Alternatively the runlevel can be permanently set to 5, starting the
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357 | <command>lightdm</command> greeter screen automatically, by modifying
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358 | <filename>/etc/inittab</filename>. As the <systemitem
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359 | class="username">root</systemitem> user:
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360 | </para>
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361 |
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362 | <screen role="root"><userinput>cp -v /etc/inittab{,-orig} &&
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363 | sed -i '/initdefault/ s/3/5/' /etc/inittab</userinput></screen>
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364 | -->
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365 | </sect3>
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366 |
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367 | <sect3 id="lightdm-sessions">
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368 | <title>Available Sessions</title>
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369 |
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370 | <para>
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371 | The greeter offers a list of available sessions,
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372 | depending on the Window Managers and Desktop Environments installed. The
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373 | list includes sessions which have a corresponding
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374 | <filename>.desktop</filename> file installed under
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375 | <filename class="directory">/usr/share/xsessions</filename>. Most of the
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376 | Window Managers and Desktop Environments automatically provide those
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377 | files, but if necessary, you may include a custom one.
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378 | </para>
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379 |
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380 | </sect3>
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381 |
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382 | </sect2>
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383 |
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384 | <sect2 role="content">
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385 | <title>Contents</title>
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386 |
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387 | <segmentedlist>
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388 | <segtitle>Installed Programs</segtitle>
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389 | <segtitle>Installed Libraries</segtitle>
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390 | <segtitle>Installed Directories</segtitle>
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391 |
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392 | <seglistitem>
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393 | <seg>
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394 | dm-tool,
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395 | lightdm, and
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396 | lightdm-gtk-greeter
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397 | </seg>
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398 | <seg>
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399 | liblightdm-gobject-1.so
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400 | </seg>
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401 | <seg>
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402 | /etc/lightdm,
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403 | /etc/apparmor.d,
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404 | /usr/lib/lightdm,
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405 | /usr/include/lightdm-gobject-1,
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406 | /usr/share/help/C/lightdm
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407 | /usr/share/gtk-doc/html/lightdm-gobject-1,
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408 | /usr/share/doc/lightdm-gtk-greeter-&lightdm-gtk-greeter-version;,
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409 | /var/lib/lightdm,
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410 | /var/lib/lightdm-data,
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411 | /var/cache/lightdm, and
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412 | /var/log/lightdm
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413 | </seg>
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414 | </seglistitem>
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415 | </segmentedlist>
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416 |
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417 | <variablelist>
|
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418 | <bridgehead renderas="sect3">Short Descriptions</bridgehead>
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419 | <?dbfo list-presentation="list"?>
|
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420 | <?dbhtml list-presentation="table"?>
|
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421 |
|
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422 | <varlistentry id="lightdm-prog">
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423 | <term><command>lightdm</command></term>
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424 | <listitem>
|
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425 | <para>
|
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426 | is a display and login manager
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427 | </para>
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428 | <indexterm zone="lightdm lightdm-prog">
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429 | <primary sortas="b-lightdm">lightdm</primary>
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430 | </indexterm>
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431 | </listitem>
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432 | </varlistentry>
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433 |
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434 | <varlistentry id="lightdm-gtk-greeter">
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435 | <term><command>lightdm-gtk-greeter</command></term>
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436 | <listitem>
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437 | <para>
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438 | is an auxiliary process that displays the greeter,
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439 | a graphical user interface that performs user
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440 | authentication and initiates the selected window manager
|
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441 | or display environment
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442 | </para>
|
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443 | <indexterm zone="lightdm lightdm-gtk-greeter">
|
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444 | <primary sortas="b-lightdm-gtk-greeter">lightdm-gtk-greeter</primary>
|
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445 | </indexterm>
|
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446 | </listitem>
|
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447 | </varlistentry>
|
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448 |
|
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449 | </variablelist>
|
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450 |
|
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451 | </sect2>
|
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452 |
|
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453 | </sect1>
|
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