package samba4 4.0.0~alpha18.dfsg1-4ubuntu2 failed to install/upgrade: ErrorMessage: subprocess installed post-installation script returned error exit status 126

[Matt Legrand]

>>Problem: While installing (from aptitude?) new Ubuntu 12.04 I got a message about samba4 not installing.

>>Details:
I installed it manually and reproduced the problem. Here's the output from the manual installation:
matt_user@matt-laptop:~$ sudo apt-get install samba4
[sudo] password for matt_user:
Reading package lists... Done
Building dependency tree
Reading state information... Done
samba4 is already the newest version.
The following packages were automatically installed and are no longer required:
  libboost-system1.40-dev libswscale0 libwildmidi0 kdelibs4c2a
  libboost-test1.40.0 libboost-regex1.40.0 librpmbuild0 libavutil49
  libqt4-assistant libboost-wave1.40.0 libxine1-x kpackagekit
  libkadm5clnt-mit7 libsoundtouch1c2 librsvg2-2.18-cil
  libboost-program-options1.40.0 libkleo4 libftgl2 libxine1-misc-plugins
  kdelibs-data libgdata1.4-cil libregexp-java kdelibs5 libxcb-xv0
  libboost-thread1.40-dev libboost-iostreams1.40-dev librpmio0 librpm0
  libpostproc51 libaccess-bridge-java-jni liblualib50 podsleuth
  gnome-do-docklets libboost-thread1.40.0 libaccess-bridge-java
  openoffice.org-l10n-common libexiv2-6 libboost-serialization1.40.0
  libboost-date-time1.40.0 libavformat52 libboo2.0.9-cil kdesudo libalut0
  libx264-85 install-package libpolkit-qt-1-0 libkpgp4
  libboost-filesystem1.40-dev libqt4-webkit libboost-program-options1.40-dev
  libboost-signals1.40.0 libavahi-qt3-1 libboost-graph1.40.0
  libboost-math1.40.0 libboost-iostreams1.40.0 libboost-regex1.40-dev
  libboost-math1.40-dev liblzo2-2 python2.6-dev libboost1.40-dev gdebi-kde
  libboost-serialization1.40-dev libboost-graph1.40-dev kdepimlibs5
  libkadm5srv-mit7 libmysqlclient16 libboost-date-time1.40-dev libattica0
  libavcodec52 libboost-wave1.40-dev openoffice.org-l10n-en-gb
  libboost-signals1.40-dev update-manager-kde libmodplug0c2
  libboost-filesystem1.40.0 packagekit-backend-apt global libkdb5-4
  libcommons-lang-java python-foolscap liblua50 virtuoso-nepomuk
  libboost-test1.40-dev libboost-system1.40.0 libmpcdec3 libboost-python1.40.0
  libiptcdata0 libwebkit1.1-cil libxine1-console libavdevice52 libxine1
Use 'apt-get autoremove' to remove them.
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
1 not fully installed or removed.
After this operation, 0 B of additional disk space will be used.
Do you want to continue [Y/n]? y
Setting up samba4 (4.0.0~alpha18.dfsg1-4ubuntu2) ...
Unknown parameter encountered: "max log size"
Ignoring unknown parameter "max log size"
Unknown parameter encountered: "syslog"
Ignoring unknown parameter "syslog"
Unknown parameter encountered: "unix password sync"
Ignoring unknown parameter "unix password sync"
Unknown parameter encountered: "passwd program"
Ignoring unknown parameter "passwd program"
Unknown parameter encountered: "pam password change"
Ignoring unknown parameter "pam password change"
Unknown parameter encountered: "map to guest"
Ignoring unknown parameter "map to guest"
Unknown parameter encountered: "usershare allow guests"
Ignoring unknown parameter "usershare allow guests"
Unknown parameter encountered: "guest ok"
Ignoring unknown parameter "guest ok"
Unknown parameter encountered: "guest ok"
Ignoring unknown parameter "guest ok"
Unknown parameter encountered: "max log size"
Ignoring unknown parameter "max log size"
Unknown parameter encountered: "syslog"
Ignoring unknown parameter "syslog"
Unknown parameter encountered: "unix password sync"
Ignoring unknown parameter "unix password sync"
Unknown parameter encountered: "passwd program"
Ignoring unknown parameter "passwd program"
Unknown parameter encountered: "pam password change"
Ignoring unknown parameter "pam password change"
Unknown parameter encountered: "map to guest"
Ignoring unknown parameter "map to guest"
Unknown parameter encountered: "usershare allow guests"
Ignoring unknown parameter "usershare allow guests"
Unknown parameter encountered: "guest ok"
Ignoring unknown parameter "guest ok"
Unknown parameter encountered: "guest ok"
Ignoring unknown parameter "guest ok"
/var/lib/dpkg/info/samba4.postinst: 14: /var/lib/dpkg/info/samba4.postinst: /usr/share/samba/setoption.pl: Permission denied
dpkg: error processing samba4 (--configure):
 subprocess installed post-installation script returned error exit status 126
No apport report written because MaxReports is reached already
                                                              Errors were encountered while processing:
 samba4
E: Sub-process /usr/bin/dpkg returned an error code (1)

>>Version info:
matt_user@matt-laptop:~$ lsb_release -rd
Description: Ubuntu 12.04.1 LTS
Release: 12.04

samba4:
  Installed: 4.0.0~alpha18.dfsg1-4ubuntu2
  Candidate: 4.0.0~alpha18.dfsg1-4ubuntu2
  Version table:
 *** 4.0.0~alpha18.dfsg1-4ubuntu2 0
        500 http://us.archive.ubuntu.com/ubuntu/ precise/universe i386 Packages
        100 /var/lib/dpkg/status

ProblemType: Package
DistroRelease: Ubuntu 12.04
Package: samba4 4.0.0~alpha18.dfsg1-4ubuntu2
ProcVersionSignature: Ubuntu 3.2.0-29.46-generic 3.2.24
Uname: Linux 3.2.0-29-generic i686
ApportVersion: 2.0.1-0ubuntu12
Architecture: i386
Date: Sun Aug 26 07:55:09 2012
ErrorMessage: ErrorMessage: subprocess installed post-installation script returned error exit status 126
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100429)
SourcePackage: samba4
Title: package samba4 4.0.0~alpha18.dfsg1-4ubuntu2 failed to install/upgrade: ErrorMessage: subprocess installed post-installation script returned error exit status 126
UpgradeStatus: Upgraded to precise on 2012-08-26 (0 days ago)