[Bug 1307134] Re: Ubiquity presents unhelpful error dialog after "Preparing to Install" screen

[Roderick Smith]

** Attachment added: "/var/log/installer/debug file from debug run"
   https://bugs.launchpad.net/ubuntu/+source/ubiquity/+bug/1307134/+attachment/4082594/+files/debug

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Title:
  Ubiquity presents unhelpful error dialog after "Preparing to Install"
  screen

Status in “ubiquity” package in Ubuntu:
  New

Bug description:
  Ubiquity is producing an unhelpful error message (see attachment) on
  one of my test systems after I select "Continue" in the "Preparing to
  Install Ubuntu" screen. After dismissing this dialog box, nothing
  happens; the mouse pointer changes to a rotating circle of dots and
  the next screen does not appear. I'm attaching the
  /var/log/installer/debug file from a run of "ubiquity -d -b". (This
  problem occurs even without the -b option, though.) As the debug file
  seems to indicate a partitioning problem, here's my partition table,
  as seen from both parted and gdisk:

  $ sudo parted /dev/sda print
  Model: ATA WDC WD10EARS-00M (scsi)
  Disk /dev/sda: 1000GB
  Sector size (logical/physical): 512B/4096B
  Partition Table: gpt

  Number  Start   End     Size    File system  Name                Flags
   1      20.5kB  315MB   315MB   fat32        EFI System          boot
   2      315MB   839MB   524MB   reiserfs     Ubuntu /boot
   3      839MB   1363MB  524MB   ext2         Ubuntu 14.04 /boot
   4      1363MB  26.4GB  25.0GB  ext4         Ubuntu root
   5      26.4GB  216GB   190GB                Linux LVM           lvm
   6      216GB   431GB   215GB                Linux LVM           lvm
   7      431GB   646GB   215GB                Linux LVM           lvm
   9      834GB   834GB   524MB   ext2         Fedora /boot
  10      834GB   835GB   524MB   btrfs        Btrfs /boot
  11      835GB   887GB   52.4GB  hfs+         OS X Mountain Lion
  12      887GB   941GB   53.7GB  hfs+         Apple HFS/HFS+
  13      947GB   1000GB  53.7GB  hfs+         OS X Mavericks

  ubuntu at ubuntu:~$ sudo gdisk /dev/sda
  GPT fdisk (gdisk) version 0.8.8

  Partition table scan:
    MBR: protective
    BSD: not present
    APM: not present
    GPT: present

  Found valid GPT with protective MBR; using GPT.

  Command (? for help): p
  Disk /dev/sda: 1953525168 sectors, 931.5 GiB
  Logical sector size: 512 bytes
  Disk identifier (GUID): D850B3B5-4510-42D5-B288-F6615CCCCD21
  Partition table holds up to 128 entries
  First usable sector is 34, last usable sector is 1953525134
  Partitions will be aligned on 8-sector boundaries
  Total free space is 378410351 sectors (180.4 GiB)

  Number  Start (sector)    End (sector)  Size       Code  Name
     1              40          614439   300.0 MiB   EF00  EFI System
     2          614440         1638439   500.0 MiB   8300  Ubuntu /boot
     3         1638440         2662439   500.0 MiB   8300  Ubuntu 14.04 /boot
     4         2662440        51490565   23.3 GiB    8300  Ubuntu root
     5        51490568       422092839   176.7 GiB   8E00  Linux LVM
     6       422092840       841523239   200.0 GiB   8E00  Linux LVM
     7       841523240      1260953639   200.0 GiB   8E00  Linux LVM
     9      1627955240      1628979239   500.0 MiB   8300  Fedora /boot
    10      1628979240      1630003239   500.0 MiB   8300  Btrfs /boot
    11      1630267392      1732667391   48.8 GiB    AF00  OS X Mountain Lion
    12      1732929536      1837787135   50.0 GiB    AF00  Apple HFS/HFS+
    13      1848668160      1953523711   50.0 GiB    AF00  OS X Mavericks

  Command (? for help): v

  No problems found. 378410351 free sectors (180.4 GiB) available in 7
  segments, the largest of which is 367001600 (175.0 GiB) in size.

  Command (? for help): q
  ubuntu at ubuntu:~$ 

  As you can see, neither tool reports any problem with the partition
  table -- although the disk does admittedly have a lot of partitions!

  Here's the information that the bug report Web form requests:

  $ lsb_release -rd
  Description:	Ubuntu 14.04 LTS
  Release:	14.04

  $ apt-cache policy ubiquity
  ubiquity:
    Installed: 2.18.4
    Candidate: 2.18.4
    Version table:
   *** 2.18.4 0
          500 http://archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages
          100 /var/lib/dpkg/status

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