Analysis here appears related: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=768620
Seems the interactions here are quite complex To reproduce the problem, you can do on xenial: (install old version) # apt install avahi-daemon=0.6.32~rc+dfsg-1ubuntu2 avahi-dnsconfd=0.6.32~rc+dfsg-1ubuntu2 avahi-utils=0.6.32~rc+dfsg-1ubuntu2 (in a second terminal, leaves this running) while true; do avahi-browse -a; done (back in the first terminal) apt upgrade # will upgrade from the xenial version 1ubuntu2 to xenial-updates version 1ubuntu2.1 Looks like the --restart-after-upgrade change may be what we need except I can't see where that's actually used in the current Ubuntu or Debian package. Seems this shipped patch may have "fixed" the issue instead. This patch is in bionic, but not in xenial where are are seeing this issue reported. lathiat@optane:~/src/debian/avahi-0.7$ cat debian/patches/no-systemd-also.patch Description: Don't use 'Also=' in dnsconfd systemd unit 'Also=avahi-daemon.socket' means that 'systemctl disable avahi-dnsconfd' will also disable avahi-daemon.socket, which is definitely not what we want, and it also causes debhelper to throw an error. Just drop this entry from the configuration. Author: Steve Langasek <steve.langa...@ubuntu.com> Last-Modified: 2018-01-02 20:30:00 -0800 Bug-Debian: https://bugs.debian.org/878911 Index: avahi-0.7-3ubuntu1/avahi-dnsconfd/avahi-dnsconfd.service.in =================================================================== --- avahi-0.7-3ubuntu1.orig/avahi-dnsconfd/avahi-dnsconfd.service.in +++ avahi-0.7-3ubuntu1/avahi-dnsconfd/avahi-dnsconfd.service.in @@ -26,4 +26,3 @@ [Install] WantedBy=multi-user.target -Also=avahi-daemon.socket ** Bug watch added: Debian Bug tracker #768620 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=768620 ** Bug watch added: Debian Bug tracker #878911 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=878911 -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to avahi in Ubuntu. https://bugs.launchpad.net/bugs/1760128 Title: package avahi-dnsconfd 0.6.32~rc+dfsg-1ubuntu2 failed to install/upgrade: subprocess new pre-removal script returned error exit status 1 Status in avahi package in Ubuntu: Triaged Bug description: Ubuntu Update 30.03.18 ProblemType: Package DistroRelease: Ubuntu 16.04 Package: avahi-dnsconfd 0.6.32~rc+dfsg-1ubuntu2 ProcVersionSignature: Ubuntu 4.4.0-116.140-generic 4.4.98 Uname: Linux 4.4.0-116-generic x86_64 NonfreeKernelModules: nvidia_uvm nvidia ApportVersion: 2.20.1-0ubuntu2.15 Architecture: amd64 Date: Fri Mar 30 16:32:50 2018 ErrorMessage: subprocess new pre-removal script returned error exit status 1 InstallationDate: Installed on 2016-01-31 (788 days ago) InstallationMedia: Ubuntu-MATE 16.04 LTS "Xenial Xerus" - Alpha amd64 (20160131) RelatedPackageVersions: dpkg 1.18.4ubuntu1.4 apt 1.2.26 SourcePackage: avahi Title: package avahi-dnsconfd 0.6.32~rc+dfsg-1ubuntu2 failed to install/upgrade: subprocess new pre-removal script returned error exit status 1 UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/avahi/+bug/1760128/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
