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

[narkosen]

Confirming this bug still exists when using the daily build 64 bit
desktop live install downloaded 2013-04-21.

i7 PC with intel Ivybridge chipset. 
1 x SDD ; 1 x HDD - both aligned to sector 2048 (1MB boundary partition alignment).

Output of sudo parted -l
Model: ATA Samsung SSD 840 (scsi)
Disk /dev/sda: 128GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos

Number  Start   End     Size    Type     File system  Flags
 1      1049kB  42.1GB  42.1GB  primary  ext4         boot
 2      42.1GB  128GB   85.9GB  primary  ext4


Model: ATA ST1000DM003-9YN1 (scsi)
Disk /dev/sdb: 1000GB
Sector size (logical/physical): 512B/4096B
Partition Table: msdos

Number  Start   End     Size    Type      File system     Flags
 1      1049kB  474GB   474GB   primary   ext4
 2      474GB   949GB   474GB   primary   ext4
 3      949GB   1000GB  51.5GB  extended
 5      949GB   970GB   21.5GB  logical   ext4
 6      970GB   992GB   21.5GB  logical   ext4
 7      992GB   1000GB  8582MB  logical   linux-swap(v1)

The only way I could get install to proceed without hanging was to:
a. Boot live session - selecting 'Try Ubuntu' option.
b. Open nautilus and mount a partition (happened to be /home)
c. Start install Ubuntu.

Previous workarounds did not seem to help e.g. CLI ubiquity --debug, starting gparted then closing.
I hope it gets fixed before release as having an OS not able to install from its media is not a great selling point for new users  :-(

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

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

Status in “ubiquity” package in Ubuntu:
  Confirmed
Status in “ubiquity” source package in Raring:
  Confirmed

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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