Changing the lock screen

Support & Help Requests
1

I was just curious if I could change the lock screen background. Changing it in lightdm only works while not logged in to a particular user. Thanks!

2

It is possible. It's a security risk adding the option to MATE Tweak as the lock screen runs with elevated privileges..

There are some instructions provided there you may wish to try:

  • Create /usr/share/glib-2.0/schemas/zubuntu-mate-lock-background.gschema.override that includes a section like this:

[org.mate.background]
picture-filename='fullpath-to-lockscreen-image.jpg'

  • Run glib-compile-schema /usr/share/glib-2.0/schemas

I went a more lazier route and changed the original image:

/usr/share/backgrounds/ubuntu-mate-common/Ubuntu-Mate-Cold.jpg

If you opt for my method, the easiest way would be to navigate to the folder and open it as root from the right-click menu, and then replace the image.