Public bug reported:
After update to 26.04 LTS (`do-release-update -d` from Ubuntu 25.10),
NetworkManager.service fails to start.
```
$ sudo systemctl status NetworkManager
○ NetworkManager.service - Network Manager
Loaded: loaded (/usr/lib/systemd/system/NetworkManager.service; enabled;
preset: enabled)
Active: inactive (dead)
Docs: man:NetworkManager(8)
Jan 20 15:23:59 jmcmullan-3660 systemd[1]: [🡕] NetworkManager.service: Found
ordering cycle: netplan-configure>
Jan 20 15:23:59 jmcmullan-3660 systemd[1]: [🡕] NetworkManager.service: Job
netplan-configure.service/start del>
Jan 20 15:23:59 jmcmullan-3660 systemd[1]: [🡕] NetworkManager.service: Found
ordering cycle: netplan-configure>
Jan 20 15:23:59 jmcmullan-3660 systemd[1]: [🡕] NetworkManager.service: Job
network-online.target/start deleted>
jmcmullan-3660 ~ $ sudo systemctl status NetworkManager | cat -
○ NetworkManager.service - Network Manager
Loaded: loaded (/usr/lib/systemd/system/NetworkManager.service; enabled;
preset: enabled)
Active: inactive (dead)
Docs: man:NetworkManager(8)
Jan 20 15:23:59 jmcmullan-3660 systemd[1]: NetworkManager.service: Found
ordering cycle: netplan-configure.service/start after
nss-user-lookup.target/start after winbind.service/start after
nmbd.service/start after network-online.target/start after
NetworkManager-wait-online.service/start after NetworkManager.service/start -
after netplan-configure.service
Jan 20 15:23:59 jmcmullan-3660 systemd[1]: NetworkManager.service: Job
netplan-configure.service/start deleted to break ordering cycle starting with
NetworkManager.service/start
Jan 20 15:23:59 jmcmullan-3660 systemd[1]: NetworkManager.service: Found
ordering cycle: netplan-configure.service/start after
nss-user-lookup.target/start after winbind.service/start after
nmbd.service/start after network-online.target/start after
NetworkManager-wait-online.service/start after NetworkManager.service/start -
after netplan-configure.service
Jan 20 15:23:59 jmcmullan-3660 systemd[1]: NetworkManager.service: Job
network-online.target/start deleted to break ordering cycle starting with
NetworkManager.service/start
```
Manually running NetworkManager (`sudo /usr/sbin/NetworkManager`) starts
the service, so this looks like a systemd config issue instead of a
NetworkManager service problem.
ProblemType: Bug
DistroRelease: Ubuntu 26.04
Package: network-manager 1.54.2-2ubuntu2
ProcVersionSignature: Ubuntu 6.18.0-8.8-generic 6.18.0
Uname: Linux 6.18.0-8-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.33.1-0ubuntu3
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Tue Jan 20 15:44:13 2026
InstallationDate: Installed on 2022-08-11 (1258 days ago)
InstallationMedia: Ubuntu 22.04.1 LTS "Jammy Jellyfish" - Release amd64
(20220809.1)
IpRoute:
default via 10.10.16.1 dev enp0s31f6 proto dhcp src 10.10.19.16 metric 100
10.0.3.0/24 dev lxcbr0 proto kernel scope link src 10.0.3.1 linkdown
10.10.16.0/20 dev enp0s31f6 proto kernel scope link src 10.10.19.16 metric 100
172.17.0.0/16 dev docker0 proto kernel scope link src 172.17.0.1 linkdown
192.168.122.0/24 dev virbr0 proto kernel scope link src 192.168.122.1 linkdown
ProcEnviron:
LANG=en_US.UTF-8
PATH=(custom, no user)
SHELL=/bin/bash
TERM=xterm-256color
XDG_RUNTIME_DIR=<set>
RfKill:
0: hci0: Bluetooth
Soft blocked: no
Hard blocked: no
SourcePackage: network-manager
UpgradeStatus: Upgraded to resolute on 2026-01-20 (0 days ago)
nmcli-nm:
RUNNING VERSION STATE STARTUP CONNECTIVITY NETWORKING WIFI-HW WIFI
WWAN-HW WWAN METERED
running 1.54.2 connected started full enabled missing
enabled missing enabled no (guessed)
** Affects: network-manager (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug resolute wayland-session
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https://bugs.launchpad.net/bugs/2138763
Title:
NetworkManager.service aborts with 'Found ordering cycle'
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