Comment 4 for bug 783706

Excerpts from Ron's message of Tue May 17 00:18:20 UTC 2011:
> Did as suggested with the following result:
>
>
> The following packages will be upgraded:
> postfix
> 1 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
> 29 not fully installed or removed.
> Need to get 0 B/1,165 kB of archives.
> After this operation, 0 B of additional disk space will be used.
> Do you want to continue [Y/n]? Y
> debconf: DbDriver "config": /var/cache/debconf/config.dat is locked by
> another process: Resource temporarily unavailable
> (Reading database ... 181555 files and directories currently installed.)
> Preparing to replace postfix 2.8.2-1ubuntu1 (using
> .../postfix_2.8.2-1ubuntu2.1_i386.deb) ...
> debconf: DbDriver "config": /var/cache/debconf/config.dat is locked by
> another process: Resource temporarily unavailable
> dpkg: error processing
> /var/cache/apt/archives/postfix_2.8.2-1ubuntu2.1_i386.deb (--unpack):
> subprocess new pre-installation script returned error exit status 1
> Errors were encountered while processing:
> /var/cache/apt/archives/postfix_2.8.2-1ubuntu2.1_i386.deb
> E: Sub-process /usr/bin/dpkg returned an error code (1)
>
>
> Can't seem to get past this error. It's been a couple of weeks.. Almost
> makes one think of what MS windows 7 is like. ( almost but never)

Ron, I understand the frustration. Its entirely possible there is
another process holding this file open that shouldn't be, which would
be a bug. Can you open a Terminal and add the output of this command to
the bug report:

sudo fuser -vu /var/cache/debconf/config.dat

It should show the process which has config.dat locked. If you determine
that its ok to kill that process, you can run:

sudo kill #####

Where ##### is the process ID shown in the output of fuser.