Ubuntu 22.04 and apt upgrade

Question

I run Ubuntu 22.04.1 and as I login as root there is a message saying

2 updates can be applied immediately.

When I look at upgadeables, I get:

apt list --upgradable
libnss-systemd/jammy-updates 249.11-0ubuntu3.6 amd64 [upgradable from: 249.11-0ubuntu3.4]
libpam-systemd/jammy-updates 249.11-0ubuntu3.6 amd64 [upgradable from: 249.11-0ubuntu3.4]
libsystemd0/jammy-updates 249.11-0ubuntu3.6 amd64 [upgradable from: 249.11-0ubuntu3.4]
libudev1/jammy-updates 249.11-0ubuntu3.6 amd64 [upgradable from: 249.11-0ubuntu3.4]
systemd-sysv/jammy-updates 249.11-0ubuntu3.6 amd64 [upgradable from: 249.11-0ubuntu3.4]
systemd/jammy-updates 249.11-0ubuntu3.6 amd64 [upgradable from: 249.11-0ubuntu3.4]
udev/jammy-updates 249.11-0ubuntu3.6 amd64 [upgradable from: 249.11-0ubuntu3.4]

But when I do apt upgrade nothing happens:

apt upgrade
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
Calculating upgrade... Done
The following packages have been kept back:
  libnss-systemd libpam-systemd libsystemd0 libudev1 systemd systemd-sysv udev
0 upgraded, 0 newly installed, 0 to remove and 7 not upgraded.

Why are these packages are kept back?

And how do I overcome this?

Does dist-upgrade work? You seem to do that regularly – kanehekili Sep 28 '22 at 05:44 — kanehekili, Sep 28 '22 at 05:44
Yet another issue with phased updates ... Also see here. – Artur Meinild Sep 28 '22 at 06:16 — Artur Meinild, Sep 28 '22 at 06:16
Oh, yes I understand these are Phased Updates! Thank you – Thomas Aichinger Sep 28 '22 at 06:17 — Thomas Aichinger, Sep 28 '22 at 06:17

score 4 · Answer 1 · answered Sep 28 '22 at 06:20

Phased Updates are a safety feature

Some users get the upgraded packages first, and have the ability to report broken package, instead of everybody getting a broken package at once and millions of users scratching their heads. It's there for your protection. Don't try to outsmart it.

Kept-back packages due to Phased Updates will automatically resolve themselves, download, and install over a week or so. Most users should DO NOTHING. It's not broken. Don't try to force upgrades. Just be patient and let the system work.

Diagnosis -- how to tell if Phased Updates is the culprit:

It's easy. Run apt-cache policy on one of your held back packages. Look for the 'phased' percentage. It's only present if the package is currently phasing.

Ubuntu 22.04 and apt upgrade

1 Answers1

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