Hi,
I'd like to add another perspective from a Linux Mint 22.2 (Noble base)
user experiencing severe duplicate connection issues caused by the
NM↔Netplan interaction.
**The problem in practice:** Every NetworkManager connection (WiFi,
Ethernet, VPN) gets exported as a `90-NM-{uuid}.yaml` to
`/etc/netplan/`. On the next boot, netplan imports these back as
`netplan-NM-{uuid}.nmconnection` into `/run/NetworkManager/system-
connections/`. The result: connections multiply on every reboot. On my
system, 4 unique connections had turned into 46 entries — multiple
copies of every saved network.
Deleting the duplicates via `nmcli connection delete` doesn't help
because `netplan apply` (which runs on boot) recreates them from the
YAML files. Deleting the YAML files helps temporarily, but NM re-exports
them immediately when any connection changes.
**Why a runtime opt-out matters:**
1. **Derivative distributions** (Mint, Pop!_OS, elementary, Zorin) don't
benefit from the netplan unification goal — they use NM directly and netplan
only adds a duplication layer.
2. **VPN and virtual interface connections** are especially affected because NM
supports multiple profiles per interface while netplan merges them by interface
name (see LP #2089930).
3. The current workaround (`plugins=keyfile` in NM conf + removing 90-NM YAMLs)
works but is undocumented and fragile — a package update could re-enable the
netplan plugin.
4. A simple config option like `[netplan] enabled=false` in
`/etc/NetworkManager/conf.d/` would let derivatives and advanced users opt out
cleanly without recompilation.
The existing workarounds in this thread (symlinks, manual YAML edits,
migration scripts) all treat symptoms. A supported opt-out mechanism
would resolve the architectural mismatch for the significant number of
users running NM without needing netplan as an intermediary.
Thanks for considering this.
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https://bugs.launchpad.net/bugs/2041491
Title:
Provide an option to avoid the yaml NM backend
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