package samba4 4.0.0~alpha17~git20110807.dfsg1-1ubuntu1 failed to install/upgrade: ErrorMessage: subprocess installed post-installation script returned error exit status 1

[eric downer]

after upgrading from Maverick to 11.04, error messages indicate samba failed to install. upgrade was completed with samba errors.
Have not yet attempted to reinstall samba from package manager.

ProblemType: Package
DistroRelease: Ubuntu 11.10
Package: samba4 4.0.0~alpha17~git20110807.dfsg1-1ubuntu1
ProcVersionSignature: Ubuntu 2.6.38-15.65-generic 2.6.38.8
Uname: Linux 2.6.38-15-generic i686
ApportVersion: 1.23-0ubuntu4
Architecture: i386
Date: Thu Aug 16 19:59:48 2012
ErrorMessage: ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationMedia: Ubuntu 10.04.1 LTS "Lucid Lynx" - Release i386 (20100816.1)
SourcePackage: samba4
Title: package samba4 4.0.0~alpha17~git20110807.dfsg1-1ubuntu1 failed to install/upgrade: ErrorMessage: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: Upgraded to oneiric on 2012-08-16 (0 days ago)

[Edward Donovan (edward.donovan)]

From the contents of VarLogDistupgradeTermlog.gz , you are hitting bug 728864, which has been fixed in more recent releases of Samba 4. Take a look there to learn more.

You could run a newer Ubuntu than 11.04, it looks 12.04 would do it. But if you need to run 11.04 for now, the workaround discussed in that report is to purge the samba4 package, then reinstall. I don't see any mention of loss of data, but if you have any samba configuration files that would be laborious to re-create, probably keep a copy just in case, before doing the:

  sudo apt-get purge samba4
  sudo apt-get install samba4

Hope this helps. Thanks.