Difference between revisions of "LightDM"

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[[Category:Display managers (English)]]
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[[Category:Display managers]]
{{i18n|LightDM}}
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[[es:LightDM]]
 
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{{Article summary start}}
 
{{Article summary start}}
{{Article summary text|Provides an overview of the Light Display Manager.}}
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{{Article summary text|Provides an overview and setup of the Light Display Manager.}}
 
{{Article summary heading|Related}}
 
{{Article summary heading|Related}}
 
{{Article summary wiki|Display Manager}}
 
{{Article summary wiki|Display Manager}}
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== Installation ==
 
== Installation ==
You can install {{AUR|lightdm}} from the [[AUR]].
 
{{warning|1=Lightdm changes your $PATH and it might create issues. See [https://bbs.archlinux.org/viewtopic.php?pid=982145#p982145] for how to fix the $PATH.}}
 
  
== Enabling Lightdm ==
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Currently,  {{AUR|lightdm}} resides in the [[AUR]]. Install it like any other AUR package.
Lightdm can be loaded on startup by entering it in your daemons array in {{ic|rc.conf}}, or by appending the following line to {{ic|inittab}}:
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  x:5:respawn:/usr/sbin/lightdm 2>&1 /dev/null
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If you're using systemd, Lightdm also has a systemd service file, start it with {{ic|systemctl start lightdm.service}} or enable it for boot with {{ic|systemctl enable lightdm.service}}.
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=== Greeter===
 +
You will also need {{AUR|lightdm-gtk-greeter}} from the [[AUR]].
  
See [[Display Manager]] for detailed instructions.
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Other greeters can be installed:
 +
* {{AUR|lightdm-webkit-greeter}}
 +
* {{AUR|lightdm-crowd-greeter}}
 +
* {{AUR|lightdm-kde}}
 +
* {{AUR|lightdm-unity-greeter}}
  
== Required Configuration ==
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To change the default greeter ({{AUR|lightdm-gtk-greeter}}) edit the lightdm PKGBUILD and change the line
Lightdm will only show a blank screen until a greeter is chosen. Open the the configuration file at {{ic| /etc/lightdm/lightdm.conf}} and find the {{ic|1=#greeter-session=}} option, uncomment it, and change it to the greeter of your choice. For example, to use the default gtk3 greeter, change it to this:
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--with-greeter-session=lightdm-gtk-greeter
  greeter-session=lightdm-gtk-greeter
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to
 +
  --with-greeter-session=lightdm-yourgreeter-greeter
  
Additional greeters are available in the [[AUR]]. To see which greeters are installed, look in {{ic|/usr/share/xgreeters}}. Do not include the .desktop extension when setting your greeter.
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== Enabling Lightdm ==
 +
=== Using Initscripts ===
 +
Lightdm can be loaded on startup by entering it in the daemons array in {{ic|rc.conf}}, or by modifying {{ic|inittab}} so it points to lightdm:
 +
x:5:respawn:/usr/sbin/lightdm >& /dev/null
 +
{{Note|The 'inittab' method is the preferred method to use a graphical greeter. See [[Display_Manager#inittab_method]].}}
  
{{Note|The following requires [http://www.archlinux.org/packages/extra/i686/xorg-server-xephyr/ xorg-server-xephyr] to be installed.}}
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{{Note|Lightdm needs [[dbus]] to be running. If you get an error about "respawing too fast" you may have forgotten this.  Ensure that dbus is in your [[DAEMONS]] array in {{ic|rc.conf}}.}}
 +
=== Using Systemd ===
 +
For systems using systemd, Lightdm also has a systemd service file, start it with {{ic|systemctl start lightdm.service}} or enable it for boot with {{ic|systemctl enable lightdm.service}}.
  
It is possible to test lightdm with the following command:
+
See [[Display Manager]] for detailed instructions.
{{bc|$ lightdm --test-mode -c /etc/lightdm/lightdm.conf}}
+
  
 
== Optional Configuration and Tweaks ==
 
== Optional Configuration and Tweaks ==
Line 48: Line 54:
  
 
=== Changing the Icon ===
 
=== Changing the Icon ===
Users wishing to customize the icon (by default, the 'computer' graphic) should follow this 3-step procedure:
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Users wishing to customize the icon on the greeter screen need to edit {{ic|/etc/lightdm/lightdm-gtk-greeter.conf}} defining the '''logo''' variable.
  
# Copy a 64x64 png to {{ic|/usr/share/icons/hicolor/64x64/devices}}
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Example:
# Run {{ic|gtk-update-icon-cache /usr/share/icons/hicolor}}
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logo=/usr/share/icons/hicolor/64x64/devices/archlinux-icon-crystal-64.svg
# Edit {{ic|/usr/share/lightdm-gtk-greeter/greeter.ui}}
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Search for 'image1' and edit the 'property' xml to be the filename (less the extension).  By default it should be 'computer' by default.
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==== Sources of Arch-centric 64x64 Icons ====
 +
The archlinux-artwork package in [extra] contains some nice examples that install to {{ic|/usr/share/archlinux/icons}} and that can be copied to {{ic|/usr/share/icons/hicolor/64x64/devices}} as follows:
 +
 
 +
# find /usr/share/archlinux/icons -name "*64*" -exec cp {} /usr/share/icons/hicolor/64x64/devices \;
 +
 
 +
After copying, the archlinux-artwork package can be removed.
  
 
=== Enabling Autologin ===
 
=== Enabling Autologin ===
# gedit /etc/lightdm/lightdm.conf
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Edit {{ic|/etc/lightdm/lightdm.conf}} and change these lines to:
  
Change these lines to:
 
 
  [SeatDefaults]
 
  [SeatDefaults]
 
  autologin-user=your_user
 
  autologin-user=your_user
 
  autologin-user-timeout=0
 
  autologin-user-timeout=0
 
  pam-service=lightdm-autologin
 
  pam-service=lightdm-autologin
(last one might need to be created)
 
  
# gedit /etc/pam.d/lightdm-autologin
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==== PAM settings ====
(create if it doesn't exist)
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Add:
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#%PAM-1.0
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auth requisite pam_nologin.so
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auth required pam_env.so
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auth requisite pam_permit.so
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auth sufficient pam_succeed_if.so uid >= 1000 quiet
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auth required pam_deny.so
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account required pam_unix.so
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password required pam_deny.so
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session required pam_loginuid.so
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-session optional pam_systemd.so
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session optional pam_keyinit.so revoke
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session required pam_limits.so
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session required pam_unix.so
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=== NumLock ON ===
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Lightdm goes through PAM even when autologin is enabled. You must make sure that
Install {{ic|numlockx}}.
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PAM allows the login without prompting for a password.
  
for lightDM to turn your NumLock On do this:
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Create a new group called, say, {{ic|autologin}} and add yourself to the group:
 +
  groupadd autologin
 +
  gpasswd -a ''username'' autologin
  
# gedit /etc/lightdm/lightdm.conf
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Edit {{ic|/etc/pam.d/lightdm-autologin}} and locate the line "auth required pam_unix.so". Add new lines before and after it so that the section now reads:
 +
  auth [success=1 default=ignore] pam_succeed_if.so user ingroup autologin
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  auth required pam_unix.so
 +
  auth optional pam_permit.so
  
add the next line at the end:
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This ensures that the user will not be asked for a password when logging in through Lightdm autologin.
  
 +
=== NumLock ON ===
 +
Install the {{ic|numlockx}} package and the edit {{ic| /etc/lightdm/lightdm.conf}} adding the following line:
 
  greeter-setup-script=/usr/bin/numlockx on
 
  greeter-setup-script=/usr/bin/numlockx on
 +
 +
=== User switching under xfce4 ===
 +
With the release of xfce4 v4.10, user switching is supported natively.  To use it with lightdm, users need only to create a symlink:
 +
 +
# ln -s /usr/lib/lightdm/lightdm/gdmflexiserver /usr/bin/gdmflexiserver
 +
 +
Alternatively, see the [[https://wiki.archlinux.org/index.php/Xscreensaver#LXDM Xscreensaver#Lightdm]] article.

Revision as of 17:43, 3 November 2012

Summary help replacing me
Provides an overview and setup of the Light Display Manager.
Related
Display Manager

Lightdm LightDM is a cross-desktop display manager that aims to be the standard display manager for the X.org X server.

Installation

Currently, lightdmAUR resides in the AUR. Install it like any other AUR package.

Greeter

You will also need lightdm-gtk-greeterAUR from the AUR.

Other greeters can be installed:

To change the default greeter (lightdm-gtk-greeterAUR) edit the lightdm PKGBUILD and change the line

--with-greeter-session=lightdm-gtk-greeter

to

--with-greeter-session=lightdm-yourgreeter-greeter

Enabling Lightdm

Using Initscripts

Lightdm can be loaded on startup by entering it in the daemons array in rc.conf, or by modifying inittab so it points to lightdm:

x:5:respawn:/usr/sbin/lightdm >& /dev/null
Note: The 'inittab' method is the preferred method to use a graphical greeter. See Display_Manager#inittab_method.
Note: Lightdm needs dbus to be running. If you get an error about "respawing too fast" you may have forgotten this. Ensure that dbus is in your DAEMONS array in rc.conf.

Using Systemd

For systems using systemd, Lightdm also has a systemd service file, start it with systemctl start lightdm.service or enable it for boot with systemctl enable lightdm.service.

See Display Manager for detailed instructions.

Optional Configuration and Tweaks

Changing Background Images/Colors

Users wishing to customize the wallpaper on the greeter screen need to edit /etc/lightdm/lightdm-gtk-greeter.conf defining the background variable.

Example:

background=/usr/share/pixmaps/black_and_white_photography-wallpaper-1920x1080.jpg
Note: It is recommended to place png or jpg files in /usr/share/pixmaps since the lightdm user needs read access to the wallpaper file.

Users wishing to have a flat color (no image) may simply set the background variable to a hex color.

Example:

background=#000000

Changing the Icon

Users wishing to customize the icon on the greeter screen need to edit /etc/lightdm/lightdm-gtk-greeter.conf defining the logo variable.

Example:

logo=/usr/share/icons/hicolor/64x64/devices/archlinux-icon-crystal-64.svg

Sources of Arch-centric 64x64 Icons

The archlinux-artwork package in [extra] contains some nice examples that install to /usr/share/archlinux/icons and that can be copied to /usr/share/icons/hicolor/64x64/devices as follows:

# find /usr/share/archlinux/icons -name "*64*" -exec cp {} /usr/share/icons/hicolor/64x64/devices \;

After copying, the archlinux-artwork package can be removed.

Enabling Autologin

Edit /etc/lightdm/lightdm.conf and change these lines to:

[SeatDefaults]
autologin-user=your_user
autologin-user-timeout=0
pam-service=lightdm-autologin

PAM settings

Lightdm goes through PAM even when autologin is enabled. You must make sure that PAM allows the login without prompting for a password.

Create a new group called, say, autologin and add yourself to the group:

 groupadd autologin
 gpasswd -a username autologin

Edit /etc/pam.d/lightdm-autologin and locate the line "auth required pam_unix.so". Add new lines before and after it so that the section now reads:

 auth [success=1 default=ignore] pam_succeed_if.so user ingroup autologin
 auth required pam_unix.so
 auth optional pam_permit.so

This ensures that the user will not be asked for a password when logging in through Lightdm autologin.

NumLock ON

Install the numlockx package and the edit /etc/lightdm/lightdm.conf adding the following line:

greeter-setup-script=/usr/bin/numlockx on

User switching under xfce4

With the release of xfce4 v4.10, user switching is supported natively. To use it with lightdm, users need only to create a symlink:

# ln -s /usr/lib/lightdm/lightdm/gdmflexiserver /usr/bin/gdmflexiserver

Alternatively, see the [Xscreensaver#Lightdm] article.