missing dependency on python3-dbus

Bug #1965568 reported by Zhang Youfu
28
This bug affects 4 people
Affects Status Importance Assigned to Milestone
ubuntu-release-upgrader (Ubuntu)
Fix Released
High
Nick Rosbrook
Jammy
Fix Released
High
Unassigned
Kinetic
Fix Released
High
Nick Rosbrook

Bug Description

[Impact]

If a user does not have the python3-dbus package installed, the upgrade will fail trying to `import dbus`.

[Test Plan]

* On an Impish host, remove python3-dbus. Note that python3-distupgrade is NOT listed in the warning from dpkg.

  $ sudo dpkg -r --force-depends python3-dbus

* Attempt an upgrade, and observe the "ModuleNotFoundError: No module named 'dbus'" exception.

  $ do-release-upgrade

[Where problems could occur]

The patch moves the `import dbus` statement to later in the code, so if another part of that source file needed the dbus module, exceptions would occur.

[Original Description]

When I try to execute `do-release-upgrade -d` on a 20.04 system, the following fatal error occured.

Traceback (most recent call last):

File "/tmp/ubuntu-release-upgrader-yqb1e837/jammy", line 8, in
<module>
sys.exit(main())

File
"/tmp/ubuntu-release-upgrader-yqb1e837/DistUpgrade/DistUpgradeMain.py",
line 222, in main
from .DistUpgradeController import DistUpgradeController

File
"/tmp/ubuntu-release-upgrader-yqb1e837/DistUpgrade/DistUpgradeController.py",
line 25, in <module>
import dbus

ModuleNotFoundError: No module named 'dbus'

Related branches

tags: added: focal packaging
Revision history for this message
Launchpad Janitor (janitor) wrote :

Status changed to 'Confirmed' because the bug affects multiple users.

Changed in ubuntu-release-upgrader (Ubuntu):
status: New → Confirmed
Revision history for this message
Mike (web-g) wrote :

I had this problem on a WSL 2 instance of 20.04 when attempting to upgrade to 22.04.

I cured the problem by doing the following:

apt reinstall python3-dbus

tags: added: rls-ff-incoming
Steve Langasek (vorlon)
Changed in ubuntu-release-upgrader (Ubuntu):
importance: Undecided → High
Steve Langasek (vorlon)
Changed in ubuntu-release-upgrader (Ubuntu):
assignee: nobody → Nick Rosbrook (enr0n)
Changed in ubuntu-release-upgrader (Ubuntu Kinetic):
status: Confirmed → Triaged
Changed in ubuntu-release-upgrader (Ubuntu Jammy):
status: New → Triaged
importance: Undecided → High
tags: added: fr-2342
Lukas Märdian (slyon)
tags: removed: rls-ff-incoming
Nick Rosbrook (enr0n)
description: updated
Revision history for this message
Launchpad Janitor (janitor) wrote :

This bug was fixed in the package ubuntu-release-upgrader - 1:22.10.2

---------------
ubuntu-release-upgrader (1:22.10.2) kinetic; urgency=medium

  * DistUpgrade: Gracefully handle missing dbus module (LP: #1965568).
  * Run pre-build.sh: updating mirrors, demotions, and translations.

 -- Nick Rosbrook <email address hidden> Mon, 09 May 2022 12:16:49 -0400

Changed in ubuntu-release-upgrader (Ubuntu Kinetic):
status: Triaged → Fix Released
Revision history for this message
Łukasz Zemczak (sil2100) wrote : Please test proposed package

Hello Zhang, or anyone else affected,

Accepted ubuntu-release-upgrader into jammy-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/ubuntu-release-upgrader/1:22.04.11 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, what testing has been performed on the package and change the tag from verification-needed-jammy to verification-done-jammy. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed-jammy. In either case, without details of your testing we will not be able to proceed.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance for helping!

N.B. The updated package will be released to -updates after the bug(s) fixed by this package have been verified and the package has been in -proposed for a minimum of 7 days.

Changed in ubuntu-release-upgrader (Ubuntu Jammy):
status: Triaged → Fix Committed
tags: added: verification-needed verification-needed-jammy
Revision history for this message
Nick Rosbrook (enr0n) wrote :

I have tested upgrade from Impish to Jammy using version 1:22.04.11 using the test plan above (and appending --proposed to do-release-upgrade), and I have verified this issue is fixed.

tags: added: verification-done-jammy
removed: verification-needed-jammy
Revision history for this message
Launchpad Janitor (janitor) wrote :

This bug was fixed in the package ubuntu-release-upgrader - 1:22.04.11

---------------
ubuntu-release-upgrader (1:22.04.11) jammy; urgency=medium

  [ William 'jawn-smith' Wilson ]
  * DistUpgrade/DistUpgradeQuirks.py: Remove section of netplan
    config that is installed by default on Raspberry Pi and
    causes netplan failures after upgrade to jammy (LP: #1970761)

  [ Nick Rosbrook ]
  * DistUpgrade: Gracefully handle missing dbus module (LP: #1965568).
  * DistUpgrade: Do not show lock screen error if XDG_SESSION_TYPE is
    tty (LP: #1973785).
  * DistUpgrade: Add deb2snap entry for snapd-desktop-integration (LP: #1975747).
  * Run pre-build.sh: updating mirrors, demotions, and translations.

 -- Nick Rosbrook <email address hidden> Thu, 26 May 2022 10:49:26 -0400

Changed in ubuntu-release-upgrader (Ubuntu Jammy):
status: Fix Committed → Fix Released
Revision history for this message
Brian Murray (brian-murray) wrote : Update Released

The verification of the Stable Release Update for ubuntu-release-upgrader has completed successfully and the package is now being released to -updates. Subsequently, the Ubuntu Stable Release Updates Team is being unsubscribed and will not receive messages about this bug report. In the event that you encounter a regression using the package from -updates please report a new bug using ubuntu-bug and tag the bug report regression-update so we can easily find any regressions.

To post a comment you must log in.
This report contains Public information  
Everyone can see this information.

Duplicates of this bug

Other bug subscribers

Remote bug watches

Bug watches keep track of this bug in other bug trackers.