Hi,

NetworkManager provides a service named NetworkManager-dispatcher
[1], which executes scripts in
/{etc,usr/lib}/NetworkManager/dispatcher.d upon (network) state
changes.

This is in spirit similar to ifupdown's /etc/network/if-*.d/ scripts.

Previously, NetworkManager tried to call those ifupdown hook scripts
via NetworkManager-dispatcher by faking an ifupdown environment.

This caused a variety of problems though. While the concepts are
similar, the actual implementations differ significantly, e.g. when
certain events are triggered. So the mapping was never really correct
and complete. Also, some ifupdown hook scripts are meant to extend
the functionality of ifupdown. The bridge-utils and wpasupplicant
package are examples here, that provide hook scripts that should not
be run under NetworkManager, as it has builtin implementations for
this kind of functionality.

As a result, NetworkManager in trixie will remove support for running
ifupdown hook scripts.

Your package wide-dhcpv6-client installs one or more ifupdown hook
scripts.

Please evaluate, whether your package would benefit from shipping a
native hook script for NetworkManager. If not, please just close this
bug report with a corresponding comment.

Such package provided hook scripts should be placed in
/usr/lib/NetworkManager/dispatcher.d/. If your hook script needs
additional configuration, please place this configuration in /etc and
source that in your hooks script. It is discouraged to place package
provided hook scripts directly in /etc/NetworkManager/dispatcher.d/.
This directory is meant for local modifications.

You can read more about the NetworkManager-dispatcher interface at
[1].

If you have further questions, you can contact me directly or
preferably the pkg-utopia mailing list at
<pkg-utopia-maintainers@lists.alioth.debian.org>.

Kind regards,

Michael

[1]
https://manpages.debian.org/bookworm/network-manager/NetworkManager-d
ispatcher.8.en.html [2]

We believe that the bug you reported is fixed in the latest version of
wide-dhcpv6, which is due to be installed in the Debian FTP archive.

A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to 1054059@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Boyuan Yang <byang@debian.org> (supplier of updated wide-dhcpv6 package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@ftp-master.debian.org)
Format: 1.8
Date: Sun, 01 Nov 2026 13:24:38 -0500
Source: wide-dhcpv6
Architecture: source
Version: 20080615-25
Distribution: unstable
Urgency: medium
Maintainer: Debian QA Group <packages@qa.debian.org>
Changed-By: Boyuan Yang <byang@debian.org>
Closes: 1039419 1054059 1077616 1143898
Changes:
 wide-dhcpv6 (20080615-25) unstable; urgency=medium
 .
   * QA upload.
   * Set Maintainer to Debian QA Group following orphaning (#1152080).
   * Add native systemd units and helpers based on Simon Poirier's Ubuntu
     packaging (LP: #2153936). Retain SysV init support and the installer udeb.
     Fix the executable-condition directive and shell expansion in the
     empty-interface conditions. Run the client and relay in the foreground
     under systemd (Closes: #1039419, #1143898, #1077616).
   * Add a native NetworkManager dispatcher hook (Closes: #1054059).
   * debian/control: Bump debhelper compat to v13.
   * debian/copyright: Credit the new packaging contributions and replace
     the obsolete FSF address with a common-license reference.
   * Drop obsolete lsb-base dependencies: init-functions is now provided
     by the Essential sysvinit-utils package.
   * debian/watch: Use format 4 and HTTPS.
   * Remove the mismatched blanket patch-forwarding Lintian override.
   * debian/control: Update Standards-Version to 4.7.4, drop Priority and
     correct delegation spelling in package descriptions.
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