Script for GNOME 3.16+ with GNOME Shell themes packed inside /usr/share/gnome-shell/gnome-shell-theme.gresource.
This script allows change background on login screen.
Fedora 28, 29, 30, 31 and Fedora Silverblue
But should work on any distro with /usr/share/gnome-shell/gnome-shell-theme.gresource file.
set-gdm-wallpaper.sh /path/to/image.png
# (use --resize N option for fixing multiple monitor issues)
# Script requires gresource binary (glib2 or glib2-devel library):
# Fedora:
dnf install glib2-develFedora Silverblue
Fedora Silverblue have immutable file system. GDM wallpaper can be changed only by install/reinstall rpm.
# rpm-ostree install set-gdm-wallpaper-1-2.noarch.rpm
This will change GDM wallpaper to wallpaper-gnome.png inside .rpm file.
If you want change this image, you need to Build new .rpm file.$ dnf copr enable zirix/gdm-wallpaper
$ dnf install gdm-wallpaper
$ set-gdm-wallpaper /path/to/image.png
OR
# dnf install set-gdm-wallpaper-1-2.noarch.rpmFedora Silverblue
# rpm-ostree install set-gdm-wallpaper-1-2.noarch.rpmIf GDM load failed, then press ALT+F6 and:
# set-gdm-wallpaper.sh --uninstall
OR
# cp /usr/share/gnome-shell/gnome-shell-theme.gresource.backup /usr/share/gnome-shell/gnome-shell-theme.gresource
OR delete RPM:
# dnf remove set-gdm-wallpaper
OR
# rpm-ostree uninstall set-gdm-wallpaper$ cd /path/to/source
$ fedpkg --release f29 local
$ fedpkg --release f29 lint
Requires: fedora-packager and fedora-review
# dnf install fedora-packager fedora-review
OR
# rpm-ostree install fedora-packager fedora-review
See: https://docs.fedoraproject.org/en-US/quick-docs/creating-rpm-packages/index.htmlwallpaper-gnome.png: https://www.opendesktop.org/s/Gnome/p/1071929/