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[Thomas Mayer <1592917@xxxxxxxxxxxxxxxxxx>]

In syslog, I get a lot of complaints from apparmor:

Jun 15 19:06:02 lat61 kernel: [10041.854940] audit: type=1400 audit(1466010362.719:539): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="/usr/lib/cups/backend/cups-pdf" pid=24942 comm="apparmor_parser"
Jun 15 19:06:02 lat61 kernel: [10041.854955] audit: type=1400 audit(1466010362.719:540): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="/usr/sbin/cupsd" pid=24942 comm="apparmor_parser"
Jun 15 19:06:02 lat61 kernel: [10041.879027] audit: type=1400 audit(1466010362.743:541): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="third_party" pid=24942 comm="apparmor_parser"
Jun 15 19:06:02 lat61 kernel: [10041.892595] audit: type=1400 audit(1466010362.755:542): apparmor="DENIED" operation="create" profile="/usr/sbin/cupsd" pid=24943 comm="cupsd" family="unix" sock_type="stream" protocol=0 requested_mask="create" denied_mask="create" addr=none
Jun 15 19:06:02 lat61 kernel: [10041.892606] audit: type=1400 audit(1466010362.755:543): apparmor="DENIED" operation="create" profile="/usr/sbin/cupsd" pid=24943 comm="cupsd" family="unix" sock_type="stream" protocol=0 requested_mask="create" denied_mask="create" addr=none
Jun 15 19:06:02 lat61 kernel: [10041.893140] audit: type=1400 audit(1466010362.755:544): apparmor="DENIED" operation="create" profile="/usr/sbin/cupsd" pid=24943 comm="cupsd" family="unix" sock_type="stream" protocol=0 requested_mask="create" denied_mask="create" addr=none
Jun 15 19:06:02 lat61 kernel: [10041.893148] audit: type=1400 audit(1466010362.755:545): apparmor="DENIED" operation="create" profile="/usr/sbin/cupsd" pid=24943 comm="cupsd" family="unix" sock_type="stream" protocol=0 requested_mask="create" denied_mask="create" addr=none
Jun 15 19:06:02 lat61 kernel: [10041.956457] audit: type=1400 audit(1466010362.819:546): apparmor="DENIED" operation="create" profile="/usr/sbin/cupsd" pid=24943 comm="cupsd" family="unix" sock_type="stream" protocol=0 requested_mask="create" denied_mask="create" addr=none
Jun 15 19:06:02 lat61 kernel: [10041.956483] audit: type=1400 audit(1466010362.819:547): apparmor="DENIED" operation="create" profile="/usr/sbin/cupsd" pid=24943 comm="cupsd" family="unix" sock_type="stream" protocol=0 requested_mask="create" denied_mask="create" addr=none
Jun 15 19:06:02 lat61 kernel: [10041.957706] init: cups main process (24943) killed by TERM signal
Jun 15 19:06:02 lat61 kernel: [10041.957722] init: cups main process ended, respawning

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https://bugs.launchpad.net/bugs/1592917

Title:
  do-release-upgrade stuck when dealing with apparmor profile for cupsd

Status in linux package in Ubuntu:
  New

Bug description:
  On an up-to-date 14.04.x, I started do-release-upgrade -d to upgrade
  to ubuntu 16.04.

  At about 50% of the installation of packages, do-release-upgrade
  stucks in the following manner:

  - cpu runs at 0%~ and there is no disk I/O for about 15 minutes now
  - do-release-upgrade does not terminate, and there is no visible progress at all.

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