Happened to me on Ubuntu 15.04 MATE during Gnome desktop environment installation
Setting up gnome-maps (3.14.1.2-1) ... Setting up ubuntu-gnome-desktop (0.38) ... Processing triggers for libc-bin (2.21-0ubuntu4) ... Processing triggers for systemd (219-7ubuntu6) ... Processing triggers for ureadahead (0.100.0-19) ... Processing triggers for initramfs-tools (0.103ubuntu15) ... update-initramfs: Generating /boot/initrd.img-3.19.0-22-generic Error: GDBus.Error:org.freedesktop.DBus.Error.Spawn.ChildExited: Launch helper exited with unknown return code 1
Happened to me on Ubuntu 15.04 MATE during Gnome desktop environment installation
Setting up gnome-maps (3.14.1.2-1) ... gnome-desktop (0.38) ... img-3.19. 0-22-generic org.freedesktop .DBus.Error. Spawn.ChildExit ed: Launch helper exited with unknown return code 1
Setting up ubuntu-
Processing triggers for libc-bin (2.21-0ubuntu4) ...
Processing triggers for systemd (219-7ubuntu6) ...
Processing triggers for ureadahead (0.100.0-19) ...
Processing triggers for initramfs-tools (0.103ubuntu15) ...
update-initramfs: Generating /boot/initrd.
Error: GDBus.Error: