package network-manager 1.42.4-1ubuntu4 failed to install/upgrade: installed network-manager package post-installation script subprocess returned error exit status 8

[Tony]

I am using netplan for my network config.

ProblemType: Package
DistroRelease: Ubuntu 23.10
Package: network-manager 1.42.4-1ubuntu4
ProcVersionSignature: Ubuntu 6.2.0-20.20-generic 6.2.6
Uname: Linux 6.2.0-20-generic x86_64
ApportVersion: 2.26.1-0ubuntu3
Architecture: amd64
CRDA: N/A
CasperMD5CheckResult: unknown
Date: Thu Jun 1 12:05:16 2023
ErrorMessage: installed network-manager package post-installation script subprocess returned error exit status 8
InstallationDate: Installed on 2020-04-25 (1131 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Beta amd64 (20200402)
IpRoute:
 default via 192.168.56.1 dev enp7s0 proto static
 192.168.56.0/30 dev enp7s0 proto kernel scope link src 192.168.56.2
IwConfig:
 lo no wireless extensions.

 enp7s0 no wireless extensions.
NetworkManager.state:
 [main]
 NetworkingEnabled=true
 WirelessEnabled=true
 WWANEnabled=true
Python3Details: /usr/bin/python3.11, Python 3.11.3, python3-minimal, 3.11.2-1
PythonDetails: N/A
RebootRequiredPkgs: Error: path contained symlinks.
RelatedPackageVersions:
 dpkg 1.21.22ubuntu1
 apt 2.7.0
RfKill:

SourcePackage: network-manager
Title: package network-manager 1.42.4-1ubuntu4 failed to install/upgrade: installed network-manager package post-installation script subprocess returned error exit status 8
UpgradeStatus: Upgraded to mantic on 2023-06-01 (0 days ago)
nmcli-con: Error: command ['nmcli', '-f', 'all', 'con'] failed with exit code 8: Error: NetworkManager is not running.
nmcli-dev: Error: command ['nmcli', '-f', 'all', 'dev'] failed with exit code 8: Error: NetworkManager is not running.
nmcli-nm: Error: command ['nmcli', '-f', 'all', 'gen'] failed with exit code 8: Error: NetworkManager is not running.

[Danilo Egea Gondolfo (danilogondolfo)]

Thanks for your bug report.

This problem seems to be caused by the netplan migration logic in the postinst script. I'm looking into it.

[Launchpad Janitor (janitor)]

This bug was fixed in the package network-manager - 1.42.4-1ubuntu5

---------------
network-manager (1.42.4-1ubuntu5) mantic; urgency=medium

  * d/network-manager.postinst: fix netplan migration logic.
    The "continue" is being executed in a subshell so it's not skipping the
    next commands. It will fail if Network Manager is not running. See LP: #2022023
  * d/network-manager.preinst: use /var/lib/NetworkManager for backups
    /root is not a system directory so we shouldn't use it. It might not
    even exist or the package manager might run in a sandbox and not have
    access to it. See LP: #2021937

 -- Danilo Egea Gondolfo <email address hidden> Thu, 01 Jun 2023 15:17:57 +0100