package samba4 4.0.0~alpha15~git20110124.dfsg1-2ubuntu1 failed to install/upgrade: ErrorMessage: subprocess installed post-installation script returned error exit status 1

[Andrew McGillis]

Binary package hint: samba4

Ran the upgrade to Ubuntu 11.04 and went to bed. Woke up and my netbook told me it failed to install Samba4. File downloading was unusually slow too. I don't know why.

ProblemType: Package
DistroRelease: Ubuntu 11.04
Package: samba4 4.0.0~alpha15~git20110124.dfsg1-2ubuntu1
ProcVersionSignature: Ubuntu 2.6.35-28.50-generic 2.6.35.11
Uname: Linux 2.6.35-28-generic i686
Architecture: i386
Date: Fri Apr 29 02:04:49 2011
ErrorMessage: ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationMedia: Ubuntu-Netbook-Remix 9.10 "Karmic Koala" - Release i386 (20091028.4)
SourcePackage: samba4
Title: package samba4 4.0.0~alpha15~git20110124.dfsg1-2ubuntu1 failed to install/upgrade: ErrorMessage: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: Upgraded to natty on 2011-04-29 (0 days ago)

[Andrew McGillis (thwapp)]

Additional info:

My netbook is an MSI Wind U100-257CA netbook. It's bone stock with 2 exceptions. I Upped it to 2GB of ram and updated the BIOS to allow a part-time 24% overclock to speed it up a bit. It's running a wired network connection on AC power while I did the 11.04 upgrade, and I did not have it overclocked either. I hope that all this info helps.

I am not all that knowledgable when it comes to problems that occasionally crop up in Linux. In fact, i's classify myself as a wet-behind-the-ears newbie in Linux. I know enough to be dangerous to my installation. After the 11.04 upgrade process failed, this is what I tried...

I rebooted my netbook and the desktop doesn't load up now. Used "CTRL+ALT+F1" to login on a console, ran "sudo bash", then ran "apt-get purge samba4" to completely remove the Samba4 package (thank you man pages!) which completed without issue. Then I rebooted. On reboot, the desktop didn't complete loading again. Switched to text console using "CTRL+ALT+F1" again to login, ran "sudo bash" again, then ran "apt-get clean" (if I understood the man page correctly, that should remove the download from my netbook and force a redownload of the package..) and then "ran apt-get install samba4" to try and manually re-install the package. It failed with the same error. *sigh*. I rebooted again to the desktop which again didn't load the UI, but after about 30 seconds, it popped up with a "Submit Bug" request. Not realizing it was the same error, I submitted it again. Sorry for my blunder!

Thanks for reading...

[Andrew McGillis (thwapp)]

Called a friend in for help. He noticed that the Samba4 package was reporting a file not found error which was caused by a faulty symbolic link created by the Samba4 package.

The link in question was:

/usr/lib/samba/ldb/modules/samba

which was linked to:

../../../samba/ldb

A workable fix was to manually link it to:

/usr/lib/samba/ldb

And now it works!