Comment 0 for bug 1326707

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@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)