# cat /proc/version_signature
Ubuntu 3.8.0-37.53~precise1-generic 3.8.13.18


# tail /var/log/upstart/cups.log
AppArmor parser error for /etc/apparmor.d/usr.sbin.cupsd in /etc/apparmor.d/usr.sbin.cupsd at line 18: Invalid capability block_suspend.
AppArmor parser error for /etc/apparmor.d/usr.sbin.cupsd in /etc/apparmor.d/usr.sbin.cupsd at line 18: Invalid capability block_suspend.
cupsd failed to create /var/run/cups/cups.sock, skipping automatic printer configuration
cupsd failed to create /var/run/cups/cups.sock, skipping automatic printer configuration
cupsd failed to create /var/run/cups/cups.sock, skipping automatic printer configuration

# apparmor_parser -p /etc/apparmor.d/usr.sbin.cupsd | grep capability
  capability net_bind_service,
  capability net_bind_service,
  #capability block_suspend,
  capability chown,
  capability dac_override,
  capability fowner,
  capability fsetid,
  capability kill,
  capability net_bind_service,
  capability setgid,
  capability setuid,

# apt-cache policy apparmor
apparmor:
  Installed: 2.7.102-0ubuntu3.9
  Candidate: 2.7.102-0ubuntu3.9
  Version table:
 *** 2.7.102-0ubuntu3.9 0
        500 http://us.archive.ubuntu.com/ubuntu/ precise-updates/main amd64 Packages
        100 /var/lib/dpkg/status
     2.7.102-0ubuntu3.7 0
        500 http://security.ubuntu.com/ubuntu/ precise-security/main amd64 Packages
     2.7.102-0ubuntu3 0
        500 http://us.archive.ubuntu.com/ubuntu/ precise/main amd64 Packages

apt-cache policy cups
cups:
  Installed: 1.5.3-0ubuntu8
  Candidate: 1.5.3-0ubuntu8
  Version table:
 *** 1.5.3-0ubuntu8 0
        500 http://us.archive.ubuntu.com/ubuntu/ precise-updates/main amd64 Packages
        100 /var/lib/dpkg/status
     1.5.3-0ubuntu5.1 0
        500 http://security.ubuntu.com/ubuntu/ precise-security/main amd64 Packages
     1.5.2-9ubuntu1 0
        500 http://us.archive.ubuntu.com/ubuntu/ precise/main amd64 Packages

apt-cache policy linux-generic-lts-raring
linux-generic-lts-raring:
  Installed: 3.8.0.37.37
  Candidate: 3.8.0.37.37
  Version table:
     3.8.0.38.38 0
        400 http://archive.ubuntu.com/ubuntu/ precise-proposed/main amd64 Packages
 *** 3.8.0.37.37 0
        500 http://us.archive.ubuntu.com/ubuntu/ precise-updates/main amd64 Packages
        500 http://security.ubuntu.com/ubuntu/ precise-security/main amd64 Packages
        100 /var/lib/dpkg/status