[Bug 1080701] Re: After 'Preparing to install Ubuntu' screen, raring installation hangs

[Hugh Kernohan]

I suffered this problem when shifting from 12.04 to a clean install of
13.04 with twin hard disks and a dual-boot to Windows.  The 'Disk Setup'
stage refused to recognise existing partitions or free space.  Partman
usually exited with error code 141 but sometimes crashed.  I lost three
days days of my life and became intimately acquainted with testdisk.

Eventually I tracked the fault to the existence of dmraid metadata on
the two hard drives.  It was not shown up by testdisk but was listed by
dmraid.  Using **dmraid -rE** to erase the unnecessary metadata meant
that the ubiquity install routine functioned normally.

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https://bugs.launchpad.net/bugs/1080701

Title:
  After 'Preparing to install Ubuntu' screen, raring installation hangs

Status in “partman-auto” package in Ubuntu:
  Fix Released
Status in “ubiquity” package in Ubuntu:
  Fix Released
Status in “partman-auto” source package in Raring:
  Fix Released
Status in “ubiquity” source package in Raring:
  Fix Released

Bug description:
  Test steps:
  1. Boot the machine with usb
  2. Enter the wireless password to enable the wifi connection
  3. Wait to hear the drums  and select 'Install Ubuntu' with English being the language selection
  4. Click 'Continue' with the default selections on the 'Preparing  to install ubuntu' screen( where it shows the power, available disk space and internet connectivity statu)
  5. The installation does not proceed from this point

  Workarounds:
  It has been reported within this bug that deleting extended partitions, or disabling swap, or mounting partitions "helps" to bypass the problem.

  Why is this not fixed yet:
  Well, at the moment the cause of hangs has not been determined. The best way to aid Ubuntu Installer team at fixing this bug is to provide a reproducible test case of this hang, that is is steps that one needs to perform to setup a VM / real machine that will exhibit such hang. At the moment we don't know how to trigger this bug and thus diagnose & fix it.

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