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

[Roman Yepishev]

I can reproduce it with 90% reliability on my laptop with 6 partitions (for multiple ubuntu versions)
ubiquity process is hanging with 
/bin/sh /lib/partman/automatically_partition/25replace/choices

Where that process actually stops in:
open("/var/lib/partman/stopfifo")
which is used for synchronization with partman_server. It looks like the latter no longer reads from the pipe.

partman_server itself is blocked in open("/var/lib/partman/outfifo") for
reading but it does not look like somebody has written anything there.

It looks like by introducing some delays in the scripts (e.g. by set -x
which prints what's being executed by the interpreter and log-output
dumps it to syslog) I can get the partitioning screen to work.

By feeding some "OK" strings to outfifo, stopfifo and infifo I seem to
be able to resynchronize the scripts with partman and the proper page
appears in the installer. I guess it expects something other than a
bunch of OKs so an attempt to do something on that page ends up in a
messagebox with "??? ???" title and  "??? ???" description (yes,
question marks).

So it looks like if there are quite a few partitions, partman_server can
get out of sync with the scripts that feed it the data and this blocks
the installer. This also explains why I was not able to reproduce this
issue in a VM or during my initial Raring setup - at that stage there
were no filesystems on the disk so the whole filesystem probing process
took much less time.

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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:
  Raring desktop i386 20121119 installation hangs on dell inspiron, with
  ubuntu partman:   No matching physical volumes found error message on
  the syslog.

  The following is the syslog segment that may be of interest

  Nov 19 13:22:25 ubuntu partman:   No matching physical volumes found
  Nov 19 13:22:25 ubuntu partman:   Reading all physical volumes.  This may take a while...
  Nov 19 13:22:25 ubuntu partman:   No volume groups found
  Nov 19 13:22:25 ubuntu partman-lvm:   No volume groups found
  Nov 19 13:22:29 ubuntu ntpdate[4662]: adjust time server 91.189.94.4 offset -0.220470 sec
  Nov 19 13:22:32 ubuntu ntfsresize: ntfsresize v2012.1.15AR.5 (libntfs-3g)
  Nov 19 13:22:32 ubuntu ntfsresize: Device name        : /dev/sda3
  Nov 19 13:22:32 ubuntu ntfsresize: NTFS volume version: 3.1
  Nov 19 13:22:32 ubuntu ntfsresize: Cluster size       : 4096 bytes
  Nov 19 13:22:32 ubuntu ntfsresize: Current volume size: 149962973696 bytes (149963 MB)
  Nov 19 13:22:32 ubuntu ntfsresize: Current device size: 149962980352 bytes (149963 MB)
  Nov 19 13:22:32 ubuntu ntfsresize: Checking filesystem consistency ...
  Nov 19 13:22:32 ubuntu ntfsresize: Accounting clusters ...
  Nov 19 13:22:32 ubuntu ntfsresize: Space in use       : 88054 MB (58.7%)
  Nov 19 13:22:32 ubuntu ntfsresize: Collecting resizing constraints ...
  Nov 19 13:22:32 ubuntu ntfsresize: You might resize at 88053858304 bytes or 88054 MB (freeing 61909 MB).
  Nov 19 13:22:32 ubuntu ntfsresize: Please make a test run using both the -n and -s options before real resizing!
  Nov 19 13:22:33 ubuntu ubiquity: umount: /tmp/tmp.83KkHQhjEN: not mounted
  Nov 19 13:22:33 ubuntu ubiquity: umount: /tmp/tmp.vF1xKWu5Pp: not mounted

  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

  ProblemType: Bug
  DistroRelease: Ubuntu 13.04
  Package: ubiquity 2.13.3 [modified: lib/partman/automatically_partition/question]
  ProcVersionSignature: Ubuntu 3.7.0-2.8-generic 3.7.0-rc5
  Uname: Linux 3.7.0-2-generic i686
  ApportVersion: 2.6.2-0ubuntu3
  Architecture: i386
  CasperVersion: 1.329
  Date: Mon Nov 19 13:27:12 2012
  InstallCmdLine: file=/cdrom/preseed/ubuntu.seed boot=casper initrd=/casper/initrd.lz quiet splash -- maybe-ubiquity
  LiveMediaBuild: Ubuntu 13.04 "Raring Ringtail" - Alpha i386 (20121119)
  MarkForUpload: True
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   LANG=en_US.UTF-8
  SourcePackage: ubiquity
  UpgradeStatus: No upgrade log present (probably fresh install)

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