Progress! "Authentication failure" right after an autologin usually comes from PAM, not from the getty config. Things worth checking on the stick:
- passwd -S skysigner: an account that is locked or e...
Thanks for the suggestions. Every time I solve one problem another one seems to appear :D I will check the PAM configuration and account settings you mentioned. I am not giving up though. At least I am learning something new with every error. 😊