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Change GNOME 3 Lock Screen Background

Once again the GNOME developers have managed to complicate things beyond belief. Why the GNOME UI Nazis decided there should be no simple way to change the background for both the login screen, the desktop backgound and the screen lock background is beyond comprehension!

In a previous post I explained how to change the GDM (GNOME Desktop Manager) background image. In this post I explain how to change the Lock Screen background image.

Taking Fedora 17 (Beefy Miracle) as an example, as root edit /usr/share/backgrounds/beefy-miracle/default/beefy-miracle.xml. Here are the contents of this file:

<background>
    <starttime>
        <year>2012</year>
        <month>01</month>
        <day>29</day>
        <hour>00</hour>
        <minute>00</minute>
        <second>00</second>
    </starttime>
<static>
<duration>10000000000.0</duration>
<file>
    <!-- Wide 16:10 -->
    <size width="1920" height="1200">/usr/share/backgrounds/beefy-miracle/default/wide/SundownDunes.jpg</size>
    <!-- Standard 4:3 -->
    <size width="2048" height="1536">/usr/share/backgrounds/beefy-miracle/default/standard/SundownDunes.jpg</size>
    <!-- Normalish 5:4 -->
    <size width="1280" height="1024">/usr/share/backgrounds/beefy-miracle/default/normalish/SundownDunes.jpg</size>
</file>
</static>
</background>


Just replace /usr/share/backgrounds/beefy-miracle/default/normalish/SundownDunes.jpg with a valid path to a suitable image. For example, here is what I currently have in my copy of this XML file:

....
<file>
        <!-- Wide 16:10 -->
        <size width="1920" height="1200">/usr/share/backgrounds/beefy-miracle/default/Droplet_wallpaper_by_Katosu.jpg</size>
        <!-- Standard 4:3 -->
        <size width="2048" height="1536">/usr/share/backgrounds/beefy-miracle/default/Droplet_wallpaper_by_Katosu.jpg`</size>
        <!-- Normalish 5:4 -->
        <size width="1280" height="1024">/usr/share/backgrounds/beefy-miracle/default/Droplet_wallpaper_by_Katosu.jpg</size>
>/file>


Other distributions containing GNOME 3 have a similar file.

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