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I admit I knew this to be a long shot, but had to try it - I upgraded my 23.10 to 24.04.

After booting up, my network connectivity is gone and the Settings screen says:

NetworkManager not running

What I would usually do in this situation would be:

systemctl start NetworkManager

But it seems to be completely gone. If I try installing it (yes, I know, no internet), it says that actually network-manager depends on libnetplan1 (>= 0.106) which is not installable.

The packages.ubuntu.com also returns 0 results for libnetplan1 (there is libnetplan0 however): https://packages.ubuntu.com/search?keywords=libnetplan1&searchon=names&suite=all&section=all

Has anyone else had this issue? How would you proceed with triaging this?

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    This install was hit by that issue, as was another box here... alas development products are off-topic on this site regardless of being in alpha or beta; with Ubuntu noble still in alpha. This isn't a Ubuntu+1 or Ubuntu-Next support site.
    – guiverc
    Commented Mar 29 at 9:34
  • 1
    Ubuntu 24.04 (noble) doesn't yet exist; it's currently the development release Ubuntu noble and remains that until it reaches RC state which isn't expected until after 18 April 2024, and isn't on-topic here until release on 25 April 2024. discourse.ubuntu.com/t/noble-numbat-release-schedule/35649 Please refer askubuntu.com/help/on-topic. For support issues with Ubuntu noble you'll need to use a #ubuntu-next or #ubuntu+1 site (IRC, UF etc)
    – guiverc
    Commented Mar 29 at 9:34
  • A related issue is bugs.launchpad.net/ubuntu/+source/network-manager/+bug/2055012, the solution described there might work as well.
    – Zh.
    Commented Mar 29 at 17:05
  • Please note for future users... whilst this issue has already been resolved/fix (thus this specific issue won't reoccur), the actual problem end-users encountered depended on when they actually performed their upgrade.. thus fix actually differs too (as packages advanced from -proposed to main; some requiring deletion from main first.. what was available varied over mere minutes/hours)
    – guiverc
    Commented Mar 29 at 23:20

1 Answer 1

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Looks like something is going wrong on Ubuntu's side, see:
https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/2059651

As comment #5 on that bug ticket mentioned, you can workaround this temporarily by manually download and dpkg --force-all -i network-manager DEB package of previous version from mirror archives.
However, there will still be many packages missing and make the system unusable (even desktop environment being removed if running apt dist-upgrade after this issue occurs).

Since Noble is still under active development (not reaching beta yet), this issue might get fixed in the next few days.

Update: get the machine back online with the workaround and then apt update, --fix-broken install, install ubuntu-desktop then upgrade should fix this now.

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  • BIG BIG Thank you! Alongside old network-mananger, I downloaded libteamdctl and libndp from noble and installed them as you suggested. It started working immediately :) Commented Mar 29 at 10:41
  • I upgraded from 22.04 (via 23.10) to (the released) 24.04, which includes the migration to netplan. While a bunch of files were generated in /etc/netplan, NM/nmcli considered all my interfaces "unmanaged", and networking didn't work at all. Using ifconfig/dhclinent, I was able to set up a working connection, reinstall network-manager with apt, and now it appears to work. Thanks! Commented May 2 at 6:12

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