[Bug 1023036] Re: Error on /usr/share/ubiquity/plugininstall.py", line 1687, affecting desktop images (preseeded install)

[Colin Watson]

Today's jenkins runs showed that the debconf protocol has got out of
sync.  In this sequence of commands:

        db_set hw-detect/select_modules "$LIST"
        db_input medium hw-detect/select_modules || true
        db_go || exit 10 # back up

... the db_input is receiving the reply to db_set, and db_go is
receiving the reply to db_input.  This certainly explains the peculiar
bail-out, but it doesn't yet explain why the protocol is out of sync in
the first place.  I'm uploading 2.11.13 with some more debugging to try
to find that out.

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Title:
  Error on /usr/share/ubiquity/plugininstall.py", line 1687, affecting
  desktop images (preseeded install)

Status in “ubiquity” package in Ubuntu:
  In Progress
Status in “ubiquity” source package in Quantal:
  In Progress

Bug description:
  Desktop smoke testing failing on plugininstall.py,

  DEBUG:root:Jul 10 11:06:40 ubuntu plugininstall.py:   File "/usr/share/ubiquity/plugininstall.py", line 1687, in <module>
  Jul 10 11:06:40 ubuntu plugininstall.py:     install.run()
  Jul 10 11:06:40 ubuntu plugininstall.py:   File "/usr/share/ubiquity/plugininstall.py", line 56, in wrapper
  Jul 10 11:06:40 ubuntu plugininstall.py:     func(self)
  Jul 10 11:06:40 ubuntu plugininstall.py:   File "/usr/share/ubiquity/plugininstall.py", line 187, in run
  Jul 10 11:06:40 ubuntu plugininstall.py:     self.configure_hardware()
  Jul 10 11:06:40 ubuntu plugininstall.py:   File "/usr/share/ubiquity/plugininstall.py", line 830, in configure_hardware
  Jul 10 11:06:40 ubuntu plugininstall.py:     raise install_misc.InstallStepError("HwDetect failed with code %d" % ret)
  Jul 10 11:06:40 ubuntu plugininstall.py: ubiquity.install_misc.InstallStepError: HwDetect failed with code 10
  Jul 10 11:06:40 ubuntu plugininstall.py:

  When I try to install manually today's desktop am64 image
  (20120710.1), it freezes on the Choose a Picture screen (not sure if
  related, but I thought it'd be worth mentioning.

  
  Examples of failing jobs:
  https://jenkins.qa.ubuntu.com/view/Quantal/view/ISO%20Testing%20Dashboard/job/quantal-desktop-i386_default/63/console
  https://jenkins.qa.ubuntu.com/view/Quantal/view/ISO Testing Dashboard/job/quantal-desktop-amd64_encryptedhome/32/console
  https://jenkins.qa.ubuntu.com/view/Quantal/view/ISO%20Testing%20Dashboard/job/quantal-desktop-i386_default/63/console

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