web-greeter-theme-luminosity

A theme for Web Greeter

Overview

Customizable LightDM Web Greeter theme based on the design of luminos by (Muhammad Sayuti) which was based on the official LightDM Webkit Greeter theme of Antergos Linux.

This dark theme was built for use on Linux Workstations at the Department of Physics ETH Zurich, because there was no suitable theme available that would allow us to use it in combination with a central authentication provider like LDAP or Kerberos. Other themes present a list of users to select from, as it is done with the default LightDM configuration, which does just not scale with our currently active 2464 LDAP user accounts :)

Credits

Many thanks to the following guys for their support on this project.

• Claude Becker (upekkha)
• Anastassios Martakos (realmar)
• Christian Herzog (daduke)
• Alex Myczko (alexmyczko)
• Janosch Bühler (WitteShadovv)

Features

• Works with web-greeter 3.4.0
• Username promt (no userlist)
• Customizable configuration
• Shows the hostname
• Shows currently active lighdm user sessions (when locked)
• Shows useful static information
• Short feedback after authenticating (success/failure)
• Drop-down list for session selection
• Wallpaper changer

Screenshots

Prerequisites

• lightdm
• web-greeter (releases)

Configuration

Enable web-greeter by editing /etc/lightdm/lightdm.conf and setting greeter-session property to web-greeter:

[Seat:*]
greeter-session=web-greeter
greeter-show-manual-login=true
greeter-hide-users=true
user-session=ubuntu
allow-guest=false

To select another screen for the lightdm greeter in a multimonitor configuration, add the following line:

display-setup-script=xrandr --output <id> --primary

while <id> is the screen, use xrandr to list your screen ids.

Installation

Clone the theme to /usr/share/web-greeter/themes/luminosity:

cd /usr/share/web-greeter/themes
git clone https://github.com/rda0/web-greeter-theme-luminosity.git luminosity

To select luminosity as default theme just change the greeter.theme property in /etc/lightdm/web-greeter.yml to luminosity::

greeter:
    debug_mode: False
    detect_theme_errors: True
    screensaver_timeout: 300
    secure_mode: True
    theme: luminosity
    icon_theme:
    time_language:

Now restart lightdm:

systemctl restart lightdm.service

The theme can be customized in branding.theme (optional), see docs for example. To generate thumbnails run generate-images.py (requires graphicsmagick).

Using light-locker

You may also want to install light-locker to replace gnome-screensaver to show the Web Greeter lock screen after automatic session lock.

Installation

apt purge gnome-screensaver
apt install python-gi python3-pyside
apt install light-locker light-locker-settings

Configuration

Remove the line starting with NotShowIn= in light-locker.desktop to start light-locker also in gnome:

sed -i '/NotShowIn=/d' /etc/xdg/autostart/light-locker.desktop

Disable gnome screensaver proxy:

cat > /etc/xdg/autostart/org.gnome.SettingsDaemon.ScreensaverProxy.desktop << EOF
[Desktop Entry]
Hidden=false
EOF

Now kill the screensaver (if it is running) and then restart lightdm.

User configuration

The user can configure light-locker with the settings panel light-locker-settings.

To check if light-locker works:

$ light-locker-command -q
The screensaver is inactive  (means: it is running)
$ light-locker-command -l
# this will lock the screen

You may also use loginctl lock-session to lock your screen.

Uninstallation

To uninstall, simply restore the greeter-session property of the /etc/lightdm/lightdm.conf file and restart your computer (or at least lightdm).

You may also want to:

• Remove the folder luminosity which was created in /usr/share/web-greeter/themes/
• Restore the webkit-theme property of the /etc/lightdm/web-greeter.conf file