[Bug 1326707] [NEW] Ubiquity does't start, hangs in "/usr/lib/ubiquity/bin/ubiquity", line 426, in acquire_lock, test_debconf.stdout.readline()

[Jean-Baptiste Lallement]

Public bug reported:

All flavors and archs of Utopic Desktop.
Last known good image is 20140522.

ubiquity-dm and ubiquity do not start.
Ubiquity started from the command line hangs forever, interrupting with CTRL-C shows that it's waiting on:

-----
ubuntu at ubuntu:~$ ubiquity -d
^CTraceback (most recent call last):
  File "/usr/lib/ubiquity/bin/ubiquity", line 636, in <module>
    main(oem_config)
  File "/usr/lib/ubiquity/bin/ubiquity", line 546, in main
    acquire_lock()
  File "/usr/lib/ubiquity/bin/ubiquity", line 426, in acquire_lock
    test_debconf.stdout.readline()
KeyboardInterrupt
umount: /var/lib/polkit-1/localauthority/90-mandatory.d: not mounted
----

The following command works fine from the command line
echo "VERSION 2.0"|sudo debconf-communitate -fnoninteractive ubiquity

ProblemType: Bug
DistroRelease: Ubuntu 14.10
Package: ubiquity 2.18.8
ProcVersionSignature: Ubuntu 3.15.0-5.10-generic 3.15.0-rc8
Uname: Linux 3.15.0-5-generic x86_64
ApportVersion: 2.14.3-0ubuntu1
Architecture: amd64
CasperVersion: 1.340
CurrentDesktop: Unity
Date: Thu Jun  5 08:54:35 2014
InstallCmdLine: file=/cdrom/preseed/ubuntu.seed boot=casper initrd=/casper/initrd.lz quiet splash --
LiveMediaBuild: Ubuntu 14.10 "Utopic Unicorn" - Alpha amd64 (20140604)
ProcEnviron:
 SHELL=/bin/bash
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 XDG_RUNTIME_DIR=<set>
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: ubiquity (Ubuntu)
     Importance: Critical
     Assignee: Ubuntu Installer Team (ubuntu-installer)
         Status: Confirmed


** Tags: amd64 apport-bug ubuntu utopic

** Changed in: ubiquity (Ubuntu)
   Importance: Undecided => Critical

** Changed in: ubiquity (Ubuntu)
     Assignee: (unassigned) => Ubuntu Installer Team (ubuntu-installer)

-- 
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https://bugs.launchpad.net/bugs/1326707

Title:
  Ubiquity does't start, hangs in "/usr/lib/ubiquity/bin/ubiquity", line
  426, in acquire_lock, test_debconf.stdout.readline()

Status in “ubiquity” package in Ubuntu:
  Confirmed

Bug description:
  All flavors and archs of Utopic Desktop.
  Last known good image is 20140522.

  ubiquity-dm and ubiquity do not start.
  Ubiquity started from the command line hangs forever, interrupting with CTRL-C shows that it's waiting on:

  -----
  ubuntu at ubuntu:~$ ubiquity -d
  ^CTraceback (most recent call last):
    File "/usr/lib/ubiquity/bin/ubiquity", line 636, in <module>
      main(oem_config)
    File "/usr/lib/ubiquity/bin/ubiquity", line 546, in main
      acquire_lock()
    File "/usr/lib/ubiquity/bin/ubiquity", line 426, in acquire_lock
      test_debconf.stdout.readline()
  KeyboardInterrupt
  umount: /var/lib/polkit-1/localauthority/90-mandatory.d: not mounted
  ----

  The following command works fine from the command line
  echo "VERSION 2.0"|sudo debconf-communitate -fnoninteractive ubiquity

  ProblemType: Bug
  DistroRelease: Ubuntu 14.10
  Package: ubiquity 2.18.8
  ProcVersionSignature: Ubuntu 3.15.0-5.10-generic 3.15.0-rc8
  Uname: Linux 3.15.0-5-generic x86_64
  ApportVersion: 2.14.3-0ubuntu1
  Architecture: amd64
  CasperVersion: 1.340
  CurrentDesktop: Unity
  Date: Thu Jun  5 08:54:35 2014
  InstallCmdLine: file=/cdrom/preseed/ubuntu.seed boot=casper initrd=/casper/initrd.lz quiet splash --
  LiveMediaBuild: Ubuntu 14.10 "Utopic Unicorn" - Alpha amd64 (20140604)
  ProcEnviron:
   SHELL=/bin/bash
   TERM=xterm
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   XDG_RUNTIME_DIR=<set>
  SourcePackage: ubiquity
  UpgradeStatus: No upgrade log present (probably fresh install)

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