Ubuntu Auth Issues with new repository code..

[Howard Leadmon]

    Saw the new repository notification, and figured what the heck I 
would try letting it upgrade me from the current v2.2.22 release that 
apparently is in the Ubuntu 16.04 packages, to the new repository 
release of v2.3.0.

  I followed the info on repo.dovecot.org, and first it started bitching 
about lmtp (dovecot: master: Fatal: service(lmtp) 
access(/usr/lib/dovecot/lmtp) failed: No such file or directory), so I 
went back and installed the dovecot-lmtpd package and that seemed to fix 
that issue.  Just FYI, I had dovecot-core, dovecot-imapd, and 
dovecot-pop3d installed on the system.

  OK, so now it started up, said it was 2.3.0 and I thought all was 
good, but now all authentication is failing.  I turned on some of the 
logging debugging, and am seeing the below:

dovecot: auth-worker(19578): Debug: 
pam(toss1,127.0.0.1,<IR3NJlZhFtZ/AAAB>): lookup service=dovecot
dovecot: auth-worker(19578): Debug: 
pam(toss1,127.0.0.1,<IR3NJlZhFtZ/AAAB>): #1/1 style=1 msg=Password:
dovecot: auth-worker(19578): pam(toss1,127.0.0.1,<IR3NJlZhFtZ/AAAB>): 
pam_authenticate() failed: System error
dovecot: auth: Debug: client passdb out: FAIL#0111#011user=toss1
dovecot: imap-login: Aborted login (auth failed, 1 attempts in 3 secs): 
user=<toss1>, method=PLAIN, rip=127.0.0.1, lip=127.0.1.1, 
session=<IR3NJlZhFtZ/AAAB>

  I took and compared my auth files like 10-auth.conf, and 
auth-system.conf.ext, and they are identical between the two versions, 
even though they were overwritten as part of the upgrade.

  If I just uninstall the 2.3.0 release, and install 2.2.22 back on the 
server, it all just starts working again.    So for now I am back on 
2.2, but was willing to give 2.3 a run if I can get it going.   Any 
ideas as to what to look at to get this working, would be great.   As 
stated above, this is Ubuntu Server 16.04.03, and I am also running 
Postfix and amavis-new, but don't think they should really impact me 
using dovecot for email over POP3 or IMAP..

---
Howard Leadmon
PBW Communications, LLC
http://www.pbwcomm.com