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[Michael Terry <michael.terry@xxxxxxxxxxxxx>]

So yeah, this looks exactly like a more frequent bug 1421009, which was
due to a dbus mutex hang.

Here are some possibly related dbus hang bugs:

Bug 1421009 (vivid, basically same bug as this one)
Bug 1417773 (RTM)
Bug 1421308 (vivid?)

The most reliable reproducer of the bunch is bug 1421009, which involves
reflashing a bunch.

And it also suggests the earliest sign of the bug as vivid image 106.

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https://bugs.launchpad.net/bugs/1428875

Title:
  Seeing high rate of unlock failures in krillin smoke testing

Status in unity8 package in Ubuntu:
  New

Bug description:
  This problem was seen 14 times over images 129-134 from ubuntu-touch
  /devel-proposed on krillin:

  [console]
  + reboot-and-unlock.sh
  13 KB/s (1049 bytes in 0.078s)
  INFO:reboot-and-wait:Restarting device... wait
  INFO:reboot-and-wait:Restarting device... wait complete
  INFO:reboot-and-wait:Waiting for networking to become active...
  PING launchpad.net (91.189.89.223) 56(84) bytes of data.
  INFO:reboot-and-wait:Network is active
  I: Unlock attempt 1 failed, script output: 'Error: Timeout was reached
  '
  I: Unlock attempt 2 failed, script output: 'Error: Timeout was reached
  '
  I: Unlock attempt 3 failed, script output: 'Error: Timeout was reached
  '
  I: Unlock attempt 4 failed, script output: 'Error: Timeout was reached
  '
  I: Unlock attempt 5 failed, script output: 'Error: Timeout was reached
  '
  I: Too many unlock failures, giving up
  [/console]

  The smoke tests do reboot the phone between test suites, so it ends up
  rebooting the phone a few dozen times during a full run. Looking back
  through prior logs, I see this older examples of this, but it appears
  to be a little more frequent over the past week. Perhaps this is
  related to
  https://bugs.launchpad.net/ubuntu/+source/unity8/+bug/1421009 ?

  Here are some examples:
  image 134
  http://dev-jenkins.ubuntu-ci:8080/job/vivid-touch-krillin-smoke-daily/538/console
  http://dev-jenkins.ubuntu-ci:8080/job/vivid-touch-krillin-smoke-daily/537/console
  http://dev-jenkins.ubuntu-ci:8080/job/vivid-touch-krillin-smoke-daily/535/console
  http://dev-jenkins.ubuntu-ci:8080/job/vivid-touch-krillin-smoke-daily/534/console
  image 133
  http://dev-jenkins.ubuntu-ci:8080/job/vivid-touch-krillin-smoke-daily/528/console
  image 132
  http://dev-jenkins.ubuntu-ci:8080/job/vivid-touch-krillin-smoke-daily/524/console
  http://dev-jenkins.ubuntu-ci:8080/job/vivid-touch-krillin-smoke-daily/523/console
  http://dev-jenkins.ubuntu-ci:8080/job/vivid-touch-krillin-smoke-daily/522/console
  image 131
  http://dev-jenkins.ubuntu-ci:8080/job/vivid-touch-krillin-smoke-daily/521/console
  http://dev-jenkins.ubuntu-ci:8080/job/vivid-touch-krillin-smoke-daily/519/console
  http://dev-jenkins.ubuntu-ci:8080/job/vivid-touch-krillin-smoke-daily/518/console
  image 130
  http://dev-jenkins.ubuntu-ci:8080/job/vivid-touch-krillin-smoke-daily/516/console
  http://dev-jenkins.ubuntu-ci:8080/job/vivid-touch-krillin-smoke-daily/515/console
  image 129
  http://dev-jenkins.ubuntu-ci:8080/job/vivid-touch-krillin-smoke-daily/513/console

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