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I have a picture which I want to set as desktop background, and I want it to stay the background image even when I restart my computer (I don't want to set it every time manually, from system settings -> apparence -> background).

Please help me, I used ubuntu tweak for the login screen logo, but I can't figure out how to change the desktop background "forever".

Many thanks!

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That is extremely odd behaviour. Normally it should stick if you went through the System Settings -> Appearance -> Background route. Are you logged in as a guest? – somoso Apr 30 '13 at 8:58
Yes couldn't belive it my self... I tried it and it stayed the same even after restart. – Meintjes Apr 30 '13 at 9:00
No, I'm logged in with admin account (the one with password) – Vlad Tarniceru Apr 30 '13 at 9:01
and I assume you logged in as admin (root) after restarting? – Meintjes Apr 30 '13 at 9:02
It doesn't stay at me... I'll restart it again now, to see, but I already tried this for 3 times. – Vlad Tarniceru Apr 30 '13 at 9:02
up vote 2 down vote accepted

Here is how you change your background:

1.Right click on the desktop, and click on Change Desktop Background. Notice the purple background in the image below the menu.

enter image description here

2.Choose an image from the displayed images, or add one of yours by clicking on the + sign.

enter image description here

3.I choose the image that is pointed, and you can see that the background image has changed, and after re-booting the image stayed the same.

enter image description here

enter image description here

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Solved. It is related to the use of encryption of the $HOME folder. The wallpaper is loaded before the login process, not after you log in. Therefore, if your wallpaper is stored in your home directory, and if your home directory is encrypted, the login system is not able to read it. To solve this issue, simple store your wallpaper image in a non-encrypted home folder, let's say in /etc, and choose it as default wallpaper as described above.

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