Bug#600320: Installation: set password for root; did not create a user; could not login after 1st reboot.
I'm trying to help a bit on triaging installation reports.
Here, the main problem (as per the bug title and part of the report)
seems to be (quoting John Hunter [2010-10-16]):
> I set up the root password but declined to create any
> [more] users. The install apparently finished OK and then I rebooted.
> Upon reboot, the system would not let me log in as root so that I
> could not manually set up /etc/password, /etc/shadow, /etc/group
> and /etc/sudoers.
So, starting from that, I tried to reproduce this by doing a fresh
(KVM) installation. I set a root password but did not create any
regular user. The installation completed normally (just had to go back
twice in the installation procedure to be able to skip the user
creation step) and, upon reboot, I actually had no problem logging-in
I would then say that this bug is not reproducible and its severity
may be downgraded. The partition formatting debate is probably another
Hope this helps...