Make lightdm look better

In Debian 11 the default lightdm login screen had two visual flaws:

  • The infobar content on top of the screen was not properly centered.
  • The generic user icon was some faint white thing.

I edited /etc/lightdm/lightdm-gtk-greeter.conf and added these two settings in the greeter section:

[greeter]
default-user-image=/usr/share/icons/Tango/scalable/apps/system-users.svg
indicators=~host;~spacer;~clock;~spacer;~power

For the icon to work the Tango icon theme is required. It is usually already installed. If not, run this:

sudo apt install tango-icon-theme

The icon looks like this:

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