19 hours ago
I can login in without any issue & can display any image as my wallpaper. But the default image does not display. I've even tried using ubuntu-tweak to change the image, but all that is displayed is a plain black screen, with the user list.
I've tried looking at dmesg, Xorg.0.log, syslog, user.log, but can find no indication as to what is the cause. So can anyone help me? Thanks.
16 hours ago
To change the login screen background of the lighdm login manager:
First backup the configuration file:
sudo cp /etc/lightdm/lightdm-gtk-greeter.conf /etc/lightdm/lightdm-gtk-greeter.conf.old
Then edit it, changing background=CURRENT-IMAGE.jpg to background=LOCATION-OF-WANTED-BACKGROUND-IMAGE.jpg
sudo gedit /etc/lightdm/lightdm-gtk-greeter.conf
Then test it, by running:
sudo lightdm --test-mode
32 hours ago
Give this a try...
Add the user localuser:lightdm to the access control list.
sudo xhost +SI:localuser:lightdm
Now using su, change/log-in as the user lightdm;
sudo su lightdm -s /bin/bash
Now to turn off the grid of white dots use:
gsettings set com.canonical.unity-greeter draw-grid false
To set a unity-greeter default background:
gsettings set com.canonical.unity-greeter background [YOUR_BACKGROUND_IMAGE]
gsettings set com.canonical.unity-greeter /usr/share/backgrounds/myWelcomeScreen.jgp
chmod 444 /usr/share/backgrounds/myWelcomeScreen.jgp
To set your desktop wallpaper for greeter screen:
gsettings set com.canonical.unity-greeter draw-user-backgrounds true
Next time the greeter screen should appear the way you want it to.