E: /var/cache/apt/archives/havp_0.86-1ubuntu0.1_i386.deb: le sous-processus nouveau script pre-removal a retourné une erreur de sortie d'état 1

What may I do to correct this problem?

Quick translation (not literal, though):

Trying to replace havp 0.86-1build1 (using .../havp_0.86-1ubuntu0.1_i386.deb)
Unmounting /var/spool/havp ...umount: /var/spool/havp: device busy
umount: /var/spool/havp: device busy
invoke-rc.d: initscript havp, action "stop" failed.
dpkg : avertissement - old pre-removal script retourned exit status 1

This problem can be solved by introducing a lazy umount in two maintainer scripts. Please see attached debdiff. I need a SRU exception before upload.

This is a bug, why was it converted to a question?

ubuntu2 should be for Jaunty and uploaded first. Then ubuntu1.1 for the
SRU.

I was in doubt but now, I'm convince that I'm lost... I've tried some of these solutions (those I can!) but there is no change. I don't understand them all! Please be explicit in your answers by writting the commands clearly. It's very useful for me. Thanks to all for your contributions and your good will

Hamado1,

Your circumstances are special, because you have already installed the package, and the postrm and init scripts will keep failing and prevent you from un-installing the package (and possibly upgrading).

You need to edit these two scripts in your file system:

/etc/init.d/havp
/var/lib/dpkg/info/havp.postrm

In both files, find the lines that contain "umount", and change that to "umount -l" -- or if that doesn't work either, simply remove or comment-out those lines.

This bug was fixed in the package havp - 0.89-1ubuntu2

---------------
havp (0.89-1ubuntu2) jaunty; urgency=low

  * Under certain circumstances, the init script and/or postrm script
    will fail to umount loop-back devices (LP: #296499). This
    issue has been addressed by performing a lazy umount in these
    two scripts.

 -- Morten Kjeldgaard <email address hidden> Thu, 13 Nov 2008 00:10:22 +0100

Accepted into intrepid-proposed, please test and give feedback here. Please see https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you in advance!

 --- 0.89-1ubuntu1 (intrepid): the issue is still present
 --- 0.89-1ubuntu1.1 (intrepid-proposed): contains the patch, lasy mount fixes this issue.

s/lasy/lazy

This bug was fixed in the package havp - 0.89-1ubuntu1.1

---------------
havp (0.89-1ubuntu1.1) intrepid-proposed; urgency=low

  * Under certain circumstances, the init script and/or postrm script
    will fail to umount loop-back devices (LP: #296499). This
    issue has been addressed by performing a lazy umount in these
    two scripts.

 -- Morten Kjeldgaard <email address hidden> Thu, 13 Nov 2008 00:10:22 +0100