As told on IRC, I tried to factor the copy_network_config method (in fact, I tried already yesterday, but didn't push it further when I saw it didn't work), but we get 'root' as casper user in install mode (no SUDO_USER environment variable) and I need 'ubuntu' to access its wallpaper gconf key.
Ok, needed changes has been done.
As told on IRC, I tried to factor the copy_network_config method (in fact, I tried already yesterday, but didn't push it further when I saw it didn't work), but we get 'root' as casper user in install mode (no SUDO_USER environment variable) and I need 'ubuntu' to access its wallpaper gconf key.