** Tags added: cups

** Description changed:

  I have two computers, one with Ubuntu 14.04 LTS and one with Ubuntu
  16.04 LTS. On both computers I have configured the printer with cups to
  print by using my Kerberos credential in the same way and it works in
  14.04 but not in 16.04.
  In 16.04 the print job just stays listed forever in "lpq" until I
  manually remove it with "lprm", while it goes through to the printer in
  For both 14.04 and 16.04 I have that
  * /usr/bin/smbspool_krb5_wrapper is chmod 700
  * "AuthInfoRequired negotiate" is set in /etc/cups/printers.conf
  * /usr/lib/cups/backend/smb is a symbolic link to 
  The users does not exist in /etc/passwd, instead they are in LDAP and
  when they log in to the computer they get some Kerberos tickets for the
  domain and the network file system. When printing on 14.04 they get
  another Kerberos ticket for the printing system according to "klist"
  after they have done "lpr" and printed a document. On 16.04 nothing is
  printed and the user gets no Kerberos ticket for the printing system and
  the job is left in "lpq".
  On 14.04 I have Samba version 2:4.3.11+dfsg-0ubuntu0.14.04.10 and on
  16.04 I have 2:4.3.11+dfsg-0ubuntu0.16.04.9. I attach the smb.conf file
  which is exactly the same for both 14.04 and 16.04.
+ On 14.04 I have CUPS 1.7.2-0ubuntu1.8 and on 16.04 I have 2.1.3-4.
  I attach how it looks like in /var/log/cups/error_log, after setting
  "LogLevel debug" in /etc/cups/cupsd.conf, in 16.04 where it does not
  work (I have just changed my uid and gid to 1000). When I compare the
  log with 14.04 where it does work I see that 16.04 uses two backslashes
  when setting KRB5CCNAME while 14.04 does not use backslashes, maybe that
  is the problem?
  Thanks for any ideas about what goes wrong in 16.04 or how I can track
  down the problem, e.g., by comparing with 14.04 where it does work!

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  Printing with smbspool_krb5_wrapper not working in Ubuntu 16.04

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