[ab4fdfc] | 1 | <?xml version="1.0" encoding="UTF-8"?>
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[2e704d1b] | 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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[14e36759] | 7 | <!ENTITY gdm-download-http "&gnome-download-http;/gdm/&gnome-46;/gdm-&gdm-version;.tar.xz">
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[e1e58be] | 8 | <!ENTITY gdm-download-ftp " ">
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[d2b91ea8] | 9 | <!ENTITY gdm-md5sum "1d92ec4dd0643907fa135056aee18066">
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| 10 | <!ENTITY gdm-size "912 KB">
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| 11 | <!ENTITY gdm-buildsize "37 MB">
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[14e36759] | 12 | <!ENTITY gdm-time "0.2 SBU">
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[2e704d1b] | 13 | ]>
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| 14 |
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[51dfb3e] | 15 | <sect1 id="gdm" xreflabel="GDM-&gdm-version;">
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[2e704d1b] | 16 | <?dbhtml filename="gdm.html"?>
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| 17 |
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| 18 |
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| 19 | <title>GDM-&gdm-version;</title>
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| 20 |
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| 21 | <indexterm zone="gdm">
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| 22 | <primary sortas="a-GDM">GDM</primary>
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| 23 | </indexterm>
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| 24 |
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| 25 | <sect2 role="package">
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| 26 | <title>Introduction to GDM</title>
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| 27 |
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| 28 | <para>
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| 29 | <application>GDM</application> is a system service that is
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| 30 | responsible for providing graphical logins and managing local
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| 31 | and remote displays.
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| 32 | </para>
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| 33 |
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[de74d323] | 34 | &lfs122_checked;
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[2e704d1b] | 35 |
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| 36 | <bridgehead renderas="sect3">Package Information</bridgehead>
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| 37 | <itemizedlist spacing="compact">
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| 38 | <listitem>
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| 39 | <para>
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| 40 | Download (HTTP): <ulink url="&gdm-download-http;"/>
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| 41 | </para>
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| 42 | </listitem>
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| 43 | <listitem>
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| 44 | <para>
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| 45 | Download (FTP): <ulink url="&gdm-download-ftp;"/>
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| 46 | </para>
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| 47 | </listitem>
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| 48 | <listitem>
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| 49 | <para>
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| 50 | Download MD5 sum: &gdm-md5sum;
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| 51 | </para>
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| 52 | </listitem>
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| 53 | <listitem>
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| 54 | <para>
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| 55 | Download size: &gdm-size;
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| 56 | </para>
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| 57 | </listitem>
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| 58 | <listitem>
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| 59 | <para>
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| 60 | Estimated disk space required: &gdm-buildsize;
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| 61 | </para>
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| 62 | </listitem>
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| 63 | <listitem>
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| 64 | <para>
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| 65 | Estimated build time: &gdm-time;
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| 66 | </para>
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| 67 | </listitem>
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| 68 | </itemizedlist>
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[d3207212] | 69 | <!--
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[dbea07b] | 70 | <bridgehead renderas="sect3">Additional Downloads</bridgehead>
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| 71 | <itemizedlist spacing="compact">
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| 72 | <listitem>
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| 73 | <para>
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| 74 | Required patch:
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| 75 | <ulink url="&patch-root;/gdm-&gdm-version;-security_fix-1.patch"/>
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| 76 | </para>
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| 77 | </listitem>
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| 78 | </itemizedlist>
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[d3207212] | 79 | -->
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[2e704d1b] | 80 | <bridgehead renderas="sect3">GDM Dependencies</bridgehead>
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| 81 |
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| 82 | <bridgehead renderas="sect4">Required</bridgehead>
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| 83 | <para role="required">
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| 84 | <xref linkend="accountsservice"/>,
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[bb93f8f1] | 85 | <xref linkend="dconf"/>,
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| 86 | <xref linkend="libcanberra"/> (built after
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| 87 | <xref role="nodep" linkend="gtk3"/>), and
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[2e704d1b] | 88 | <xref linkend="linux-pam"/>
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| 89 | </para>
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| 90 |
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[e87734c] | 91 | <bridgehead renderas="sect4">Optional</bridgehead>
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| 92 | <para role="optional">
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[fe4f5dc] | 93 | <xref linkend="keyutils"/>
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[e87734c] | 94 | </para>
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| 95 |
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[2e704d1b] | 96 | <bridgehead renderas="sect4">Runtime Dependencies</bridgehead>
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| 97 | <para role="required">
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[9b1042fd] | 98 | <xref role="runtime" linkend="gnome-session"/>,
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| 99 | <xref role="runtime" linkend="gnome-shell"/>, and
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[51dfb3e] | 100 | <phrase revision="sysv"><xref role="runtime" linkend="elogind"/></phrase>
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| 101 | <phrase revision="systemd"><xref role="runtime" linkend="systemd"/></phrase>
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[2e704d1b] | 102 | </para>
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| 103 |
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| 104 | </sect2>
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| 105 |
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| 106 | <sect2 role="installation">
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| 107 | <title>Installation of GDM</title>
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| 108 |
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| 109 | <para>
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| 110 | It is recommended to have a dedicated user and group to take
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| 111 | control of the <command>gdm</command> daemon after it is
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| 112 | started. Issue the following commands as the
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| 113 | <systemitem class="username">root</systemitem> user:
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| 114 | </para>
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| 115 |
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| 116 | <screen role="root"><userinput>groupadd -g 21 gdm &&
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| 117 | useradd -c "GDM Daemon Owner" -d /var/lib/gdm -u 21 \
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[a2858f9] | 118 | -g gdm -s /bin/false gdm &&
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| 119 | passwd -ql gdm</userinput></screen>
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[2e704d1b] | 120 |
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[c266b64] | 121 | <!--
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[c339779] | 122 | <para revision="sysv">
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| 123 | First, adapt GDM to build without systemd present:
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| 124 | </para>
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| 125 |
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| 126 | <screen revision="sysv"><userinput remap="pre">sed -i -r '/(^| )systemd_dep/d' meson.build</userinput></screen>
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[c266b64] | 127 | -->
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[c339779] | 128 |
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[2e704d1b] | 129 | <para>
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| 130 | Install <application>GDM</application> by running the following
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| 131 | commands:
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| 132 | </para>
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| 133 |
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[6c6b4190] | 134 | <screen revision="sysv"><userinput>sed -e 's@systemd@elogind@' \
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| 135 | -e '/elogind/isession required pam_loginuid.so' \
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| 136 | -i data/pam-lfs/gdm-launch-environment.pam &&
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[51dfb3e] | 137 |
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[c339779] | 138 | mkdir build &&
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| 139 | cd build &&
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| 140 |
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[6d6005b0] | 141 | meson setup .. \
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| 142 | --prefix=/usr \
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| 143 | --buildtype=release \
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| 144 | -D gdm-xsession=true \
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| 145 | -D run-dir=/run/gdm \
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| 146 | -D logind-provider=elogind \
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| 147 | -D systemd-journal=false \
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| 148 | -D systemdsystemunitdir=no \
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| 149 | -D systemduserunitdir=no &&
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[c339779] | 150 | ninja</userinput></screen>
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| 151 |
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[16a72f7] | 152 | <screen revision="systemd"><userinput>mkdir build &&
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[c339779] | 153 | cd build &&
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| 154 |
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[6d6005b0] | 155 | meson setup .. \
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| 156 | --prefix=/usr \
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| 157 | --buildtype=release \
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| 158 | -D gdm-xsession=true \
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| 159 | -D run-dir=/run/gdm &&
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[c339779] | 160 | ninja</userinput></screen>
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[2e704d1b] | 161 |
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[0b5169af] | 162 | <para>
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| 163 | This package does not come with a usable test suite.
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| 164 | </para>
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[2e704d1b] | 165 |
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| 166 | <para>
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| 167 | Now, as the <systemitem class="username">root</systemitem> user:
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| 168 | </para>
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| 169 |
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[c266b64] | 170 | <screen role="root"><userinput>ninja install</userinput></screen>
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[2e704d1b] | 171 |
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| 172 | </sect2>
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| 173 |
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| 174 | <sect2 role="commands">
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| 175 | <title>Command Explanations</title>
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| 176 |
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[adf17153] | 177 | <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
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| 178 | href="../../xincludes/meson-buildtype-release.xml"/>
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| 179 |
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[2e704d1b] | 180 | <para>
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[6d6005b0] | 181 | <option>-D initial-vt=7</option>: Use this switch
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[2e704d1b] | 182 | to make <application>GDM</application> start on VT7
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| 183 | instead of the first free VT.
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| 184 | </para>
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| 185 |
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| 186 | <para>
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[6d6005b0] | 187 | <option>-D default-pam-config=lfs</option>: Use this
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[2e704d1b] | 188 | switch if you did not create the
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| 189 | <filename>/etc/lfs-release</filename> file or distribution
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| 190 | auto detection will fail and you will be unable to use
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| 191 | <application>GDM</application>.
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| 192 | </para>
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| 193 |
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[0129a2f5] | 194 | <para>
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[6d6005b0] | 195 | <parameter>-D gdm-xsession=true</parameter>: This enables the
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[0129a2f5] | 196 | installation of the <application>GDM</application> Xsession file.
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| 197 | </para>
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| 198 |
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[2e704d1b] | 199 | </sect2>
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| 200 |
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| 201 | <sect2 role="configuration">
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| 202 | <title>Configuring GDM</title>
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| 203 |
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| 204 | <sect3 id="gdm-config">
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| 205 | <title>Config Files</title>
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| 206 |
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| 207 | <para>
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| 208 | <filename>/etc/gdm/custom.conf</filename>
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| 209 | </para>
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| 210 |
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| 211 | <indexterm zone="gdm gdm-config">
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| 212 | <primary sortas="e-etc-gdm-custom.conf">/etc/gdm/custom.conf</primary>
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| 213 | </indexterm>
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| 214 |
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| 215 | </sect3>
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| 216 |
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| 217 | <sect3>
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| 218 | <title>Configuration Information</title>
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| 219 |
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| 220 | <para>
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| 221 | The GDM daemon is configured using the
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| 222 | <filename>/etc/gdm/custom.conf</filename> file. Default values
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| 223 | are stored in GSettings in the <filename>gdm.schemas</filename>
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| 224 | file. It is recommended that end-users modify the
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| 225 | <filename>/etc/gdm/custom.conf</filename> file because the schemas
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| 226 | file may be overwritten when the user updates their system to have
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| 227 | a newer version of <application>GDM</application>.
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| 228 | </para>
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| 229 |
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[4830ec3] | 230 | <para>
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| 231 | On some systems with NVIDIA GPUs, GDM will hide Wayland sessions by
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| 232 | default. This is often done to prevent users from encountering problems
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| 233 | with buggy drivers, which can result in system lockups, application
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| 234 | crashes, power management problems, and graphics slowdowns. If you have
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| 235 | an NVIDIA GPU and still want to try running Wayland sessions anyway,
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[81e4931] | 236 | execute the following command as the &root; user:
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[4830ec3] | 237 | </para>
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| 238 |
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| 239 | <screen role="nodump"><userinput>ln -s /dev/null /etc/udev/rules.d/61-gdm.rules</userinput></screen>
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| 240 |
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[2e704d1b] | 241 | </sect3>
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| 242 |
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| 243 | <sect3 id="gdm-init">
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[51dfb3e] | 244 | <title><phrase revision="sysv">Boot Script</phrase>
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| 245 | <phrase revision="systemd">Systemd Unit</phrase></title>
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| 246 |
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[fccfaa4] | 247 | <indexterm zone="gdm gdm-init">
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| 248 | <primary sortas="f-gdm">gdm</primary>
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| 249 | </indexterm>
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| 250 |
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[51dfb3e] | 251 | <para revision="sysv">
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[52250565] | 252 | To start <command>gdm</command> automatically when the system is
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| 253 | switched to runlevel 5, install the
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| 254 | <filename>/etc/rc.d/init.d/xdm</filename> script and the
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| 255 | <filename>/etc/sysconfig/xdm</filename> configuration file
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| 256 | included in the <xref linkend="bootscripts"/> package
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| 257 | and adjust <filename>/etc/inittab</filename> by running
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[2e704d1b] | 258 | as the <systemitem class="username">root</systemitem> user:
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| 259 | </para>
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| 260 |
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[fccfaa4] | 261 | <screen role="root" revision="sysv"><userinput>make install-gdm</userinput></screen>
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[2e704d1b] | 262 |
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[51dfb3e] | 263 | <para revision="sysv">
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[fccfaa4] | 264 | In order to permanently set the default runlevel to 5, starting the
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[51dfb3e] | 265 | <command>gdm</command> greeter screen automatically, you can modify
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| 266 | <filename>/etc/inittab</filename>. As the <systemitem
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| 267 | class="username">root</systemitem> user:
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| 268 | </para>
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| 269 |
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[fccfaa4] | 270 | <screen role="root" revision="sysv"><userinput>sed /initdefault/s/3/5/ -i /etc/inittab</userinput></screen>
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[51dfb3e] | 271 |
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[52250565] | 272 | <para revision="systemd">
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| 273 | To start the <command>gdm</command> daemon at boot, enable
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| 274 | the previously installed systemd unit by running the following command
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| 275 | as the <systemitem class="username">root</systemitem> user:
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| 276 | </para>
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| 277 |
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| 278 | <screen role="root" revision="systemd"><userinput>systemctl enable gdm</userinput></screen>
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| 279 |
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| 280 | <!-- [pierre October 2020] I don't understand why this is here: power
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| 281 | management works perfectly well
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[51dfb3e] | 282 | <para revision="sysv">
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| 283 | You should also disable default elogind power management:
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| 284 | </para>
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| 285 |
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| 286 | <screen role="root" revision="sysv"><userinput>cat >> /etc/elogind/logind.conf << "EOF"
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| 287 | <literal>AllowSuspend=no
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| 288 | AllowHibernation=no</literal>
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| 289 | EOF</userinput></screen>
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[52250565] | 290 | -->
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[2e704d1b] | 291 |
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| 292 | </sect3>
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| 293 |
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[36acf0f] | 294 | <sect3 id="gdm-auto-suspend">
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| 295 | <title>Configuring GDM Auto-Suspend</title>
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| 296 |
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| 297 | <para>
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| 298 | GDM will suspend the system when the greeter screen has been running
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| 299 | for a while without any interactive input. If you want to disable
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| 300 | auto-suspending for any reason (for example if the system is hosting
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| 301 | some services besides functioning as a desktop system), as the
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| 302 | &root; user, issue:
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| 303 | </para>
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| 304 |
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| 305 | <screen role='nodump'><userinput>su gdm -s /bin/bash \
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| 306 | -c "dbus-run-session \
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| 307 | gsettings set org.gnome.settings-daemon.plugins.power \
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| 308 | sleep-inactive-ac-type \
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| 309 | nothing"</userinput></screen>
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| 310 | </sect3>
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| 311 |
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[2e704d1b] | 312 | </sect2>
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| 313 |
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| 314 | <sect2 role="content">
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| 315 | <title>Contents</title>
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| 316 |
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| 317 | <segmentedlist>
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| 318 | <segtitle>Installed Programs</segtitle>
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| 319 | <segtitle>Installed Libraries</segtitle>
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| 320 | <segtitle>Installed Directories</segtitle>
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| 321 |
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| 322 | <seglistitem>
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| 323 | <seg>
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| 324 | gdm, gdmflexiserver, and gdm-screenshot
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| 325 | </seg>
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| 326 | <seg>
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[0129a2f5] | 327 | libgdm.so and pam_gdm.so (PAM Module)
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[2e704d1b] | 328 | </seg>
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| 329 | <seg>
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| 330 | /etc/gdm,
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| 331 | /usr/include/gdm,
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[0650fd6] | 332 | /usr/share/gdm, and
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| 333 | /usr/share/help/*/gdm
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[dadb1c9f] | 334 | <!-- seems those directories are not created at install, but at
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[0650fd6] | 335 | runtime
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[2e704d1b] | 336 | /var/cache/gdm,
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| 337 | /var/lib/gdm,
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| 338 | /var/log/gdm, and
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[0650fd6] | 339 | /var/run/gdm-->
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[2e704d1b] | 340 | </seg>
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| 341 | </seglistitem>
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| 342 | </segmentedlist>
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| 343 |
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| 344 | <variablelist>
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| 345 | <bridgehead renderas="sect3">Short Descriptions</bridgehead>
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| 346 | <?dbfo list-presentation="list"?>
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| 347 | <?dbhtml list-presentation="table"?>
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| 348 |
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| 349 | <varlistentry id="gdm-prog">
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| 350 | <term><command>gdm</command></term>
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| 351 | <listitem>
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| 352 | <para>
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[4c24eb0a] | 353 | is a login prompt for <application>GNOME</application>
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[2e704d1b] | 354 | </para>
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| 355 | <indexterm zone="gdm gdm-prog">
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| 356 | <primary sortas="b-gdm">gdm</primary>
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| 357 | </indexterm>
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| 358 | </listitem>
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| 359 | </varlistentry>
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| 360 |
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| 361 | <varlistentry id="gdm-screenshot">
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| 362 | <term><command>gdm-screenshot</command></term>
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| 363 | <listitem>
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| 364 | <para>
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[4c24eb0a] | 365 | is a screenshot tool for <application>GDM</application>
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[2e704d1b] | 366 | </para>
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| 367 | <indexterm zone="gdm gdm-screenshot">
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| 368 | <primary sortas="b-gdm-screenshot">gdm-screenshot</primary>
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| 369 | </indexterm>
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| 370 | </listitem>
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| 371 | </varlistentry>
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| 372 |
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| 373 | </variablelist>
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| 374 |
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| 375 | </sect2>
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| 376 |
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| 377 | </sect1>
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