Difference between revisions of "LightDM"

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[[Category:Display managers]]
 
[[Category:Display managers]]
 
[[es:LightDM]]
 
[[es:LightDM]]
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[[fr:LightDM]]
 
{{Article summary start}}
 
{{Article summary start}}
 
{{Article summary text|Provides an overview and setup of the Light Display Manager.}}
 
{{Article summary text|Provides an overview and setup of the Light Display Manager.}}
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Currently,  {{AUR|lightdm}} resides in the [[AUR]].  Install it like any other AUR package.
 
Currently,  {{AUR|lightdm}} resides in the [[AUR]].  Install it like any other AUR package.
 +
  
 
=== Greeter===
 
=== Greeter===
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  --with-greeter-session=lightdm-yourgreeter-greeter
 
  --with-greeter-session=lightdm-yourgreeter-greeter
  
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You can also choose default greeter by modifying lightdm.conf.
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To change default greeter by modifying lightdm.conf. <br>
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e.g.
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{{bc|greeter-session&#61;lightdm-kde-greeter}}Lightdm.conf can be found at :<br>
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greeter-session=lightdm-kde-greeter
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{{bc|/etc/lightdm/lightdm.conf}} <br>
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Location :
 
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/etc/lightdm/lightdm.conf
 
  
 
== Enabling Lightdm ==
 
== Enabling Lightdm ==
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See [[Display Manager]] for detailed instructions.
 
See [[Display Manager]] for detailed instructions.
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 +
=== Testing ===
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Install xorg-server-xephyr:
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pacman -S xorg-server-xephyr
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Run lightdm as a X application:
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lightdm --test-mode --debug
  
 
== Optional Configuration and Tweaks ==
 
== Optional Configuration and Tweaks ==
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==== PAM settings ====
 
==== PAM settings ====
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{{Note|One Arch user found that these steps weren't needed.}}
  
 
Lightdm goes through PAM even when autologin is enabled. You must make sure that
 
Lightdm goes through PAM even when autologin is enabled. You must make sure that
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   gpasswd -a ''username'' autologin
 
   gpasswd -a ''username'' autologin
  
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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:
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Edit {{ic|/etc/pam.d/lightdm}} 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 [success=1 default=ignore] pam_succeed_if.so user ingroup autologin
 
   auth required pam_unix.so
 
   auth required pam_unix.so
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This ensures that the user will not be asked for a password when logging in through Lightdm autologin.
 
This ensures that the user will not be asked for a password when logging in through Lightdm autologin.
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So any user you would like to login without typing password in LightDM just add to this group.
  
 
=== NumLock ON ===
 
=== NumLock ON ===

Revision as of 18:50, 19 February 2013

Template:Article summary start Template:Article summary text Template:Article summary heading Template:Article summary wiki Template:Article summary end

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

To change default greeter by modifying lightdm.conf. 

greeter-session=lightdm-kde-greeter
Lightdm.conf can be found at :
/etc/lightdm/lightdm.conf

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.

Testing

Install xorg-server-xephyr: 

pacman -S xorg-server-xephyr

Run lightdm as a X application: 

lightdm --test-mode --debug

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

Users using the unity-greeter version must edit the /usr/share/glib-2.0/schemas/com.canonical.unity-greeter.gschema.xml file

And then execute

glib-compile-schemas /usr/share/glib-2.0/schemas/

According to this page.


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

Note: One Arch user found that these steps weren't needed.

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 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. So any user you would like to login without typing password in LightDM just add to this group.

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.

Retrieved from "https://wiki.archlinux.org/index.php?title=LightDM&oldid=247913"