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<chapter id="gdm-0">
<title>Configuring GDM</title>
<highlights>
<para>This chapter describes how to configure <application>GDM</application> in the GNOME Desktop.</para>
</highlights>
<sect1 id="gdm-1">
<title>Introduction to GDM</title>
<indexterm>
<primary>GDM</primary>
<secondary>introduction</secondary>
</indexterm>
<para>To start a GNOME Desktop session, users must log in to authenticate
their identity. The login screen provides gateway to the desktop environment
for the user. The <application>GNOME Display Manager</application> (<application>GDM</application>) application controls the login screen. </para>
<para><application>GDM</application> also enables you to log in to another
session without closing the current session.</para>
</sect1>
<sect1 id="gdm-2">
<title>Configuring GDM</title>
<indexterm>
<primary>GDM</primary>
<secondary>configuring</secondary>
</indexterm>
<para>To configure <application>GDM</application>, use the <application>GDM
Configurator</application> application. To open <application>GDM Configurator</application>, choose <menuchoice><guimenu>Applications</guimenu><guisubmenu>System Tools</guisubmenu><guimenuitem>GDM Configurator</guimenuitem></menuchoice>.</para>
<para>You can configure <application>GDM</application> in the following functional
areas:</para>
<itemizedlist>
<listitem>
<para>
<guilabel>General</guilabel>
</para>
</listitem>
<listitem>
<para>
<guilabel>Standard greeter</guilabel>
</para>
</listitem>
<listitem>
<para>
<guilabel>Graphical greeter</guilabel>
</para>
</listitem>
<listitem>
<para>
<guilabel>Security</guilabel>
</para>
</listitem>
<listitem>
<para>
<guilabel>XDMCP</guilabel>
</para>
</listitem>
</itemizedlist>
<sect2 id="gdm-3">
<title>General Settings</title>
<para>Use the <guilabel>General</guilabel> tabbed section to set general GDM
preferences.</para>
<para><xref linkend="gdm-TBL-8"/> lists the general GDM settings that you can
configure.</para>
<table frame="topbot" id="gdm-TBL-8">
<title>General GDM Settings</title>
<tgroup cols="2" colsep="0" rowsep="0">
<colspec colwidth="50*"/>
<colspec colwidth="50*"/>
<thead>
<row rowsep="1">
<entry>
<para>Element</para>
</entry>
<entry>
<para>Description</para>
</entry>
</row>
</thead>
<tbody>
<row>
<entry>
<para>
<guilabel>Local</guilabel>
</para>
</entry>
<entry>
<para>Information
to be provided in a future release.</para>
</entry>
</row>
<row>
<entry>
<para>
<guilabel>Remote</guilabel>
</para>
</entry>
<entry>
<para>Information to be provided in a future release.</para>
</entry>
</row>
<row>
<entry>
<para>
<guilabel>Always use 24 hour clock format</guilabel>
</para>
</entry>
<entry>
<para>Information to be provided in a future release.</para>
</entry>
</row>
<row>
<entry>
<para>
<guilabel>Login a user automatically on first bootup</guilabel>
</para>
</entry>
<entry>
<para>Information to be provided in a future release.</para>
</entry>
</row>
<row>
<entry>
<para>
<guilabel>Automatic login username</guilabel>
</para>
</entry>
<entry>
<para>Information to be provided in a future release.</para>
</entry>
</row>
<row>
<entry>
<para>
<guilabel>Login a user automatically after a specified number
of seconds</guilabel>
</para>
</entry>
<entry>
<para>Information to be provided
in a future release.</para>
</entry>
</row>
<row>
<entry>
<para>
<guilabel>Timed login username</guilabel>
</para>
</entry>
<entry>
<para>Information to be provided in a future release.</para>
</entry>
</row>
<row>
<entry>
<para>
<guilabel>Seconds before login</guilabel>
</para>
</entry>
<entry>
<para>Information to be provided in a future release.</para>
</entry>
</row>
</tbody>
</tgroup>
</table>
</sect2>
<sect2 id="gdm-4">
<title>Standard Greeter Settings</title>
<para>Use the <guilabel>Standard greeter</guilabel> tabbed section to set
preferences for the standard greeter.</para>
<para><xref linkend="gdm-TBL-9"/> lists the standard greeter settings that
you can configure.</para>
<table frame="topbot" id="gdm-TBL-9">
<title>Standard Greeter Settings</title>
<tgroup cols="2" colsep="0" rowsep="0">
<colspec colname="colspec2" colwidth="50*"/>
<colspec colname="colspec3" colwidth="50*"/>
<thead>
<row rowsep="1">
<entry>
<para>Element</para>
</entry>
<entry>
<para>Description</para>
</entry>
</row>
</thead>
<tbody>
<row>
<entry>
<para>
<guilabel>Logo</guilabel>
</para>
</entry>
<entry>
<para>Information
to be provided in a future release.</para>
</entry>
</row>
<row>
<entry>
<para>
<guilabel>Welcome string</guilabel>
</para>
</entry>
<entry>
<para>Information to be provided in a future release.</para>
</entry>
</row>
<row>
<entry>
<para>
<guilabel>Show choosable user images (face browser)</guilabel>
</para>
</entry>
<entry>
<para>Information to be provided in a future release.</para>
</entry>
</row>
<row>
<entry>
<para>
<guilabel>No background</guilabel>
</para>
</entry>
<entry>
<para>Information to be provided in a future release.</para>
</entry>
</row>
<row>
<entry colname="colspec2">
<para>
<guilabel>Image</guilabel>
</para>
</entry>
<entry colname="colspec3">
<para/>
</entry>
</row>
<row>
<entry colname="colspec2">
<para>
<guilabel>Color</guilabel>
</para>
</entry>
<entry colname="colspec3">
<para/>
</entry>
</row>
<row>
<entry>
<para>
<guilabel>Scale background image to fit</guilabel>
</para>
</entry>
<entry>
<para>Information to be provided in a future release.</para>
</entry>
</row>
<row>
<entry>
<para>
<guilabel>Only color on remote displays</guilabel>
</para>
</entry>
<entry>
<para>Information to be provided in a future release.</para>
</entry>
</row>
<row>
<entry>
<para>
<guilabel>Background color</guilabel>
</para>
</entry>
<entry>
<para>Information to be provided in a future release.</para>
</entry>
</row>
</tbody>
</tgroup>
</table>
</sect2>
<sect2 id="gdm-5">
<title>Graphical Greeter Settings</title>
<para>Use the <guilabel>Graphical greeter</guilabel> tabbed section to set
preferences for the graphical greeter.</para>
<para><xref linkend="gdm-TBL-10"/> lists the graphical greeter settings that
you can configure.</para>
<table frame="topbot" id="gdm-TBL-10">
<title>Graphical Greeter Settings</title>
<tgroup cols="2" colsep="0" rowsep="0">
<colspec colwidth="50*"/>
<colspec colwidth="50*"/>
<thead>
<row rowsep="1">
<entry>
<para>Element</para>
</entry>
<entry>
<para>Description</para>
</entry>
</row>
</thead>
<tbody>
<row>
<entry>
<para>Greeter list</para>
</entry>
<entry>
<para>Information to be
provided in a future release.</para>
</entry>
</row>
<row>
<entry>
<para>
<guibutton>Install new theme</guibutton>
</para>
</entry>
<entry>
<para>Information to be provided in a future release.</para>
</entry>
</row>
</tbody>
</tgroup>
</table>
</sect2>
<sect2 id="gdm-6">
<title>Security Settings</title>
<para>Use the <guilabel>Security</guilabel> tabbed section to set security
preferences for GDM.</para>
<para><xref linkend="gdm-TBL-11"/> lists the security settings that you can
configure.</para>
<table frame="topbot" id="gdm-TBL-11">
<title>Security Settings</title>
<tgroup cols="2" colsep="0" rowsep="0">
<colspec colwidth="50*"/>
<colspec colwidth="50*"/>
<thead>
<row rowsep="1">
<entry>
<para>Element</para>
</entry>
<entry>
<para>Description</para>
</entry>
</row>
</thead>
<tbody>
<row>
<entry>
<para>
<guilabel>Allow root to login with GDM</guilabel>
</para>
</entry>
<entry>
<para>Information to be provided in a future release.</para>
</entry>
</row>
<row>
<entry>
<para>
<guilabel>Allow root to login remotely with GDM</guilabel>
</para>
</entry>
<entry>
<para>Information to be provided in a future release.</para>
</entry>
</row>
<row>
<entry>
<para>
<guilabel>Allow remote timed logins</guilabel>
</para>
</entry>
<entry>
<para>Information to be provided in a future release.</para>
</entry>
</row>
<row>
<entry>
<para>
<guilabel>Show system menu</guilabel>
</para>
</entry>
<entry>
<para>Information to be provided in a future release.</para>
</entry>
</row>
<row>
<entry>
<para>
<guilabel>Allow configuration from the login screen</guilabel>
</para>
</entry>
<entry>
<para>Information to be provided in a future release.</para>
</entry>
</row>
<row>
<entry>
<para>
<guilabel>Retry delay (seconds)</guilabel>
</para>
</entry>
<entry>
<para>Information to be provided in a future release.</para>
</entry>
</row>
</tbody>
</tgroup>
</table>
</sect2>
<sect2 id="gdm-7">
<title>XDMCP Settings</title>
<para>Use the <guilabel>XDMCP</guilabel> tabbed section to set preferences
for XDMCP.</para>
<para><xref linkend="gdm-TBL-12"/> lists the XDMCP settings that you can configure.</para>
<table frame="topbot" id="gdm-TBL-12">
<title>XDMCP Settings</title>
<tgroup cols="2" colsep="0" rowsep="0">
<colspec colname="colspec0" colwidth="50*"/>
<colspec colname="colspec1" colwidth="50*"/>
<thead>
<row rowsep="1">
<entry>
<para>Element</para>
</entry>
<entry>
<para>Description</para>
</entry>
</row>
</thead>
<tbody>
<row>
<entry>
<para>
<guilabel>Enable XDMCP</guilabel>
</para>
</entry>
<entry>
<para>Information to be provided in a future release.</para>
</entry>
</row>
<row>
<entry>
<para>
<guilabel>Honour indirect requests</guilabel>
</para>
</entry>
<entry>
<para>Information to be provided in a future release.</para>
</entry>
</row>
<row>
<entry>
<para>
<guilabel>Listen on UDP port</guilabel>
</para>
</entry>
<entry>
<para>Information to be provided in a future release.</para>
</entry>
</row>
<row>
<entry>
<para>
<guilabel>Maximum pending requests</guilabel>
</para>
</entry>
<entry>
<para>Information to be provided in a future release.</para>
</entry>
</row>
<row>
<entry>
<para>
<guilabel>Max pending indirect requests</guilabel>
</para>
</entry>
<entry>
<para>Information to be provided in a future release.</para>
</entry>
</row>
<row>
<entry>
<para>
<guilabel>Maximum remote sessions</guilabel>
</para>
</entry>
<entry>
<para>Information to be provided in a future release.</para>
</entry>
</row>
<row>
<entry>
<para>
<guilabel>Maximum wait time</guilabel>
</para>
</entry>
<entry>
<para>Information to be provided in a future release.</para>
</entry>
</row>
<row>
<entry>
<para>
<guilabel>Maximum indirect wait time</guilabel>
</para>
</entry>
<entry>
<para>Information to be provided in a future release.</para>
</entry>
</row>
<row>
<entry colname="colspec0">
<para>
<guilabel>Displays per host</guilabel>
</para>
</entry>
<entry colname="colspec1">
<para>Information to be provided in a future release.</para>
</entry>
</row>
<row>
<entry colname="colspec0">
<para>
<guilabel>Ping interval (minutes)</guilabel>
</para>
</entry>
<entry colname="colspec1">
<para>Information to be provided in a future release.</para>
</entry>
</row>
</tbody>
</tgroup>
</table>
</sect2>
</sect1>
<sect1 id="gdm-13">
<title>Logging in to a New Session</title>
<indexterm>
<primary>GDM</primary>
<secondary>logging in to new session</secondary>
</indexterm>
<indexterm>
<primary>New login application</primary>
</indexterm>
<para>To log in to a new session, choose <menuchoice><guimenu>Applications</guimenu><guisubmenu>System Tools</guisubmenu><guimenuitem>New login</guimenuitem></menuchoice>. A login screen is displayed. Enter your username
and password to log in.</para>
</sect1>
</chapter>
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