Finally managed to write the cuibuntu image on the sd card and even booted. Got to the log in screen but neither linaro nor root user was accepted. It just threw me back at the log in screen after inserting user and pw.
Quit-->Reboot didn't quite work. It basically got stuck on the log in again, but this time in command line.
Now it won't boot anymore and stops at "Starting System V initialisation compatibility" [fail]
btw: NetBIOS name server [fail] too
Sorry, no linux skills (yet).
Any ideas, what went wrong ?