How to make the lock screen look like the login screen?

Solution 1:

GDM

You can't make the lock screen look like the login screen.

However, you can use a theme for the lock screen. There are quite a few available at gnome-look.org. Here's an example.

Solution 2:

GDM

The answer may be a little bit late, but aside from setting the theme of the actual unlock dialog you can also set the background (i.e. the black space around the dialog) to whatever image you like. Just run the following command in the terminal:

sudo gconftool-2 --direct --config-source xml:readwrite:/etc/gconf/gconf.xml.defaults --set /desktop/gnome/background/picture_filename --type string /usr/share/backgrounds/Holes_by_FireCobold.jpg

Replace the last path in the command with the path to the image you desire to use. Do not forget to restart your desktop session (or try to restart gconfd-2 by killing it, at least).

EDIT: unless you configured the background of the login screen (e.g. via Ubuntu Tweak), the above command will also change it.

Solution 3:

LightDM

This was planned 12.04 -here is the bug report. However, it did not make the final release.

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