[Bug 1396380] [NEW] Installation stuck on "Preparing to install Ubuntu"

[f(fanta)]

Public bug reported:

Steps to reproduce:

- With ubuntu 14.10 Desktop 64-bit already installed, try ro re-install it (from USB stick)
- Choose the language (English), continue and tick the two checkboxes (download updates while installing and install the 3rd party software), continue
- it remains there indefinitely, with the "wait" cursor

(I hit Ctrl+Alt+F1 to login and submit the bug report)

What I have tried to fix the issue:
- Because it was a re-installation in a dual boot configuration with Windows 7, I booted Windows 7 and  from Windows deleted the two volumes previously used by Ubuntu (/ and swap), and tried again to install ubuntu, reproducing the same issue as before.
- Started ubuntu from the USB stick (without installation) and formatted the now free space on disk as two ubuntu partitions (approx 40 GB and 8 GB respectively); then tried ubuntu installation again, reproducing the same issue as before.

Workaround:
-  unchecked download updates while installing and install the 3rd party software, and installation continued correctly.

I am attaching a /var/log/syslog collected after reproducing the issue
and before reboot, but I can find no /var/log/partman.

ProblemType: Bug
DistroRelease: Ubuntu 14.10
Package: ubiquity 2.20.0
ProcVersionSignature: Ubuntu 3.16.0-23.31-generic 3.16.4
Uname: Linux 3.16.0-23-generic x86_64
ApportVersion: 2.14.7-0ubuntu8
Architecture: amd64
CasperVersion: 1.345
Date: Tue Nov 25 22:40:05 2014
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz.efi file=/cdrom/preseed/ubuntu.seed cdrom-detect/try-usb=true noprompt floppy.allowed_drive_mask=0 ignore_uuid boot=casper only-ubiquity quiet splash --
LiveMediaBuild: Ubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1)
ProcEnviron:
 TERM=linux
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: ubiquity (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug ubiquity-2.20.0 ubuntu utopic

** Attachment added: "/var/log/syslog"
   https://bugs.launchpad.net/bugs/1396380/+attachment/4268418/+files/syslog

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https://bugs.launchpad.net/bugs/1396380

Title:
  Installation stuck on "Preparing to install Ubuntu"

Status in “ubiquity” package in Ubuntu:
  New

Bug description:
  Steps to reproduce:

  - With ubuntu 14.10 Desktop 64-bit already installed, try ro re-install it (from USB stick)
  - Choose the language (English), continue and tick the two checkboxes (download updates while installing and install the 3rd party software), continue
  - it remains there indefinitely, with the "wait" cursor

  (I hit Ctrl+Alt+F1 to login and submit the bug report)

  What I have tried to fix the issue:
  - Because it was a re-installation in a dual boot configuration with Windows 7, I booted Windows 7 and  from Windows deleted the two volumes previously used by Ubuntu (/ and swap), and tried again to install ubuntu, reproducing the same issue as before.
  - Started ubuntu from the USB stick (without installation) and formatted the now free space on disk as two ubuntu partitions (approx 40 GB and 8 GB respectively); then tried ubuntu installation again, reproducing the same issue as before.

  Workaround:
  -  unchecked download updates while installing and install the 3rd party software, and installation continued correctly.

  I am attaching a /var/log/syslog collected after reproducing the issue
  and before reboot, but I can find no /var/log/partman.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.10
  Package: ubiquity 2.20.0
  ProcVersionSignature: Ubuntu 3.16.0-23.31-generic 3.16.4
  Uname: Linux 3.16.0-23-generic x86_64
  ApportVersion: 2.14.7-0ubuntu8
  Architecture: amd64
  CasperVersion: 1.345
  Date: Tue Nov 25 22:40:05 2014
  InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz.efi file=/cdrom/preseed/ubuntu.seed cdrom-detect/try-usb=true noprompt floppy.allowed_drive_mask=0 ignore_uuid boot=casper only-ubiquity quiet splash --
  LiveMediaBuild: Ubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1)
  ProcEnviron:
   TERM=linux
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: ubiquity
  UpgradeStatus: No upgrade log present (probably fresh install)

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