That I am aware of, since they are by default served by a specified background file on the system (can't remember under which directory though).
Starting from an ubuntu base, plymouth should already be set, it's then just a matter of changing gdm, shell and grub.
you can modify gdm by enabling the "xhost +" parameter and then launching dconf editor as "gdm" user.
would you mind trying to see? I assure you, the result is quite appealing.
Here is a sample of the config i use on fedora which can give you an idea as to where to look and what to change...grub shouldnt be too bad to change (just the color):
Code:
# User #
gsettings set org.gnome.desktop.background picture-options "centered"
gsettings set org.gnome.desktop.background picture-uri "file:///usr/share/plymouth/themes/charge/throbber-15.png"
gsettings set org.gnome.desktop.background primary-color "#202020"
gsettings set org.gnome.desktop.background secondary-color "#202020"
# GDM #
xhost +
sudo -u gdm gsettings set org.gnome.desktop.background picture-options "centered"
sudo -u gdm gsettings set org.gnome.desktop.background picture-uri "file:///usr/share/plymouth/themes/charge/throbber-15.png"
sudo -u gdm gsettings set org.gnome.desktop.background primary-color "#202020"
sudo -u gdm gsettings set org.gnome.desktop.background secondary-color "#202020"
Bookmarks