I tried recovery mode and set the password.

But that didn't work either. Interestingly, it doesn't complain about a bad password, it just goes away for a couple seconds then displays the login dialog again.

After a chat with system76 tech support...Turns out it was not a password issue. Apparently there is a situation with nvidia drivers where a login loop is created when they fail in multi monitors.

(If I remember, I found I should not try to upgrade using multiple monitors...)

Off we go...

On Thu, Jun 7, 2018 at 1:53 PM, David Kastrup <dak@gnu.org> wrote:

Mac <macdroid53@gmail.com> writes:

> Lucky you...it just finished and it borked the password file...I can't
> login. :(
>
> Some days I should just go back to bed...

Rescatux boot disk should work for repairs. So should booting up in
rescue mode.

--
David Kastrup