This is the same day as a fresh install of TW on my new laptop (i partitioned and formatted everything).
I can log in as myself but can not su to root or any other root auth requiring me to type a password
i CAN ssh in as root (password-less) <= this should be a big clue but i don't know what to make of it
rebooting doesn't help at all.

How can i get more verbose info ?
What does it mean 'user unknown' ?
Can't retrieve authentication info from where? and why? whats the error?

I'm in /etc/shadow and /etc/group i checked (and so is root)
The id command reports my user # and group # correctly too

journalctl shows this:
check pass; user unknown
password check failed for user (root)
pam_unix(su:auth): authentication failure; logname= uid=1000 euid=1000 tty=/dev/pts/4 ruser="OBFUSCATED ME" r>
FAILED SU (to root) "OBFUSCATED ME" on pts/4