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[Launchpad Bug Tracker <2095535@xxxxxxxxxxxxxxxxxx>]

You have been subscribed to a public bug by Simon Quigley (tsimonq2):

[Impact]

Qt-based flavors of Ubuntu are unable to upgrade to Plucky from Oracular
or Noble due to the Plucky frontend being ported to PyQt6.

When the port was originally done, the change author actually did test
release upgrades, but failed to consider the fact that additional
dependencies may need to be added. Additionally, the change author
failed to commit a local change, resulting in failing upgrades to
Plucky.

The majority of the required changes will be in Plucky, which will need
review from the Ubuntu Release Team due to freezes. The other two
releases simply need PyQt6 runtime dependencies added.

[Test Case]

* From Kubuntu, attempt an upgrade via `sudo do-release-upgrade -d -m
desktop -f DistUpgradeViewKDE`

Expected: Upgrade interface works.

Actual: Upgrade fails, sometimes silently

* Testing the fix requires 'do-release-upgrade -d' from the terminal,
and saying "no" at the second y/N prompt. From there, navigate to
'/tmp/ubuntu-release-upgrade-{hash}' and add
https://git.launchpad.net/~ubuntu-qt-code/ubuntu-release-
upgrader/plain/DistUpgrade/DistUpgradeViewKDE.py?h=ubuntu/main to the
folder.

* Additionally, add the following dependencies:

 - pyqt6-dev-tools
 - python3-pyqt6
 - python3-pyqt6.qtquick

* Once that's done, from the `/tmp/ubuntu-release-upgrader-{hash}`
directory, run 'sudo -E ./plucky'. The upgrade should function at this
point.

[What could go wrong]

While this change was thoroughly tested prior to uploading to Plucky, it
is entirely possible that wider testing of the fixes will reveal further
room for improvement. This falls under the criteria of a bug fix to a
release still in development, and would also be acceptable to fix past
Final Freeze if another problem were to emerge.

When it comes to Oracular and Noble, adding runtime dependencies that
would already be generally common on a Qt-based flavor anyway (when
installing some extra packages) is *almost* a no-op. This being said, if
we were to change the binary package names for pyqt6 in a stable release
update, or if those packages become uninstallable or otherwise unusable,
this change would regress.

[Original Bug]

This is likely an issue RE: Qt5 vs Qt6. I have reason to believe the
code is still Qt5 but oracular and higher is Qt6, meaning the code needs
to be refactored.

Terminal output:

$ do-release-upgrade -d -m desktop -f DistUpgradeViewKDE

Checking for a new Ubuntu release
localuser:root being added to access control list
Checking for a new Ubuntu release
kde
error: XDG_RUNTIME_DIR is invalid or not set in the environment.
Failed to create wl_display (No such file or directory)
qt.qpa.plugin: Could not load the Qt platform plugin "wayland" in "" even though it was found.
QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-root'
/usr/lib/python3/dist-packages/DistUpgrade/DistUpgradeFetcherCore.py:237: Warning: W:Download is performed unsandboxed as root as file 'plucky.tar.gz.gpg' couldn't be accessed by user '_apt'. - pkgAcquire::Run (13: Permission denied)
  result = fetcher.run()
authenticate 'plucky.tar.gz' against 'plucky.tar.gz.gpg'
extracting 'plucky.tar.gz'
error: XDG_RUNTIME_DIR is invalid or not set in the environment.
Failed to create wl_display (No such file or directory)
qt.qpa.plugin: Could not load the Qt platform plugin "wayland" in "" even though it was found.
can't load DistUpgradeViewKDE (type object 'QTextOption' has no attribute 'NoWrap')
can't load DistUpgradeViewGtk3 (Namespace Vte not available)
can't load DistUpgradeViewKDE (type object 'QTextOption' has no attribute 'NoWrap')

Reading cache

Checking package manager
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
Hit http://security.ubuntu.com/ubuntu oracular-security InRelease
Hit http://us.archive.ubuntu.com/ubuntu oracular InRelease
Hit http://us.archive.ubuntu.com/ubuntu oracular-updates InRelease
Hit http://us.archive.ubuntu.com/ubuntu oracular-backports InRelease
Fetched 0 B in 0s (0 B/s)
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
Fetched 0 B in 0s (0 B/s)

Checking for installed snaps

Calculating snap size requirements

Updating repository information
Segmentation fault (core dumped)

ProblemType: Bug
DistroRelease: Ubuntu 24.10
Package: ubuntu-release-upgrader-core 1:24.10.13
ProcVersionSignature: Ubuntu 6.11.0-13.14-generic 6.11.0
Uname: Linux 6.11.0-13-generic x86_64
ApportVersion: 2.30.0-0ubuntu4
Architecture: amd64
CasperMD5CheckResult: pass
CrashDB: ubuntu
CurrentDesktop: KDE
Date: Wed Jan 22 11:15:22 2025
InstallationDate: Installed on 2024-04-11 (287 days ago)
InstallationMedia: Ubuntu-Studio 24.04 LTS "Noble Numbat" - Beta amd64 (20240410.2)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
Symptom: ubuntu-release-upgrader
UpgradeStatus: Upgraded to oracular on 2025-01-22 (0 days ago)
VarLogDistupgradeAptHistorylog:
 Start-Date: 2025-01-22  11:13:58
 Requested-By: erich (1000)
 End-Date: 2025-01-22  11:13:58
VarLogDistupgradeAptlog:
 Log time: 2025-01-22 11:13:55.234080
 Log time: 2025-01-22 11:13:57.748196
VarLogDistupgradeApttermlog:
 Log started: 2025-01-22  11:13:58
 Log ended: 2025-01-22  11:13:58
VarLogDistupgradeTermlog:

** Affects: ubuntu-release-upgrader (Ubuntu)
     Importance: Critical
     Assignee: Simon Quigley (tsimonq2)
         Status: In Progress

** Affects: ubuntu-release-upgrader (Ubuntu Noble)
     Importance: Critical
     Assignee: Simon Quigley (tsimonq2)
         Status: Triaged

** Affects: ubuntu-release-upgrader (Ubuntu Oracular)
     Importance: Critical
     Assignee: Simon Quigley (tsimonq2)
         Status: Triaged

** Affects: ubuntu-release-upgrader (Ubuntu Plucky)
     Importance: Critical
     Assignee: Simon Quigley (tsimonq2)
         Status: In Progress


** Tags: amd64 apport-bug dist-upgrade oracular wayland-session
-- 
ubuntu-release-upgrader Qt interface Qt6 incompatibility
https://bugs.launchpad.net/bugs/2095535
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