Maybe it's related to https://bugs.launchpad.net/ubuntu/+source/ubiquity/+bug/644638 If i stop gdm from starting on first boot after prepare and start oem-config in rc.local afterwards, oem-config is loaded correctly and the wizard succedes.
As a side note: when the problem arise a "sudo whatever" (or gksudo) in the oem user gnome session makes the session crash and brings me to the gdm login screen.
Maybe it's related to https:/ /bugs.launchpad .net/ubuntu/ +source/ ubiquity/ +bug/644638
If i stop gdm from starting on first boot after prepare and start oem-config in rc.local afterwards, oem-config is loaded correctly and the wizard succedes.
As a side note: when the problem arise a "sudo whatever" (or gksudo) in the oem user gnome session makes the session crash and brings me to the gdm login screen.