Here are my rough comments from Matrix yesterday to explain why I'm
updating the bug statuses as such:
The key here is, check out all those warnings about missing XDG
environment variables. I can't speak to how GTK does this, but at least
with Qt, to get proper theming and display manager interactions, you
need to pass through environment variables as dictated by the session.
It's outside the scope of this specific bug, but the dance depends on
the flavor. Plasma-based flavors involve a combination of Wayland and
KWin, Lubuntu uses a combination of Xorg and Openbox, but both use SDDM,
and then both have their own individual setup scripts. Anyway, I can at
least get it to start the process with a few GUI windows.
[30 minutes later]
Essentially, here's what I think is happening, and is probably a good
working assumption for the time being... It's an inheritance issue. If
you remove the line explicitly setting the parent, but replace it with a
line just showing it, works just fine. See line 571 of
DistUpgradeViewKDE.py
I then ran into this at the very end:
$ sudo -E ./plucky --frontend DistUpgradeViewKDE
exitMainLoopMidFlight
Upgrading: libc6-dev:amd64 < 2.40-1ubuntu3.1 | 2.41-6ubuntu1 @ii umH Ib >
due to libc6-dev:amd64 Depends on libc6:amd64 < 2.40-1ubuntu3.1 ->
2.41-6ubuntu1 @ii umU Ib > (= 2.40-1ubuntu3.1)
Upgrading: libc-dev-bin:amd64 < 2.40-1ubuntu3.1 | 2.41-6ubuntu1 @ii umH Ib >
due to libc-dev-bin:amd64 Depends on libc6:amd64 < 2.40-1ubuntu3.1 ->
2.41-6ubuntu1 @ii umU Ib > (< 2.41)
Upgrading: libc-bin:amd64 < 2.40-1ubuntu3.1 | 2.41-6ubuntu1 @ii umH Ib > due
to libc-bin:amd64 Depends on libc6:amd64 < 2.40-1ubuntu3.1 -> 2.41-6ubuntu1 @ii
umU Ib > (< 2.41)
MarkInstall libc6:amd64 < 2.40-1ubuntu3.1 -> 2.41-6ubuntu1 @ii umU Ib > FU=1
Upgrading locales:amd64 < 2.40-1ubuntu3.1 | 2.41-6ubuntu1 @ii umH > due to
libc6:amd64
Upgrading libc6-dev:amd64 < 2.40-1ubuntu3.1 | 2.41-6ubuntu1 @ii umH Ib > due
to libc6:amd64
Upgrading libc-dev-bin:amd64 < 2.40-1ubuntu3.1 | 2.41-6ubuntu1 @ii umH Ib >
due to libc6:amd64
Upgrading libc-bin:amd64 < 2.40-1ubuntu3.1 | 2.41-6ubuntu1 @ii umH Ib > due
to libc6:amd64
2025-04-02T01:25:17-05:00 INFO Waiting for automatic snapd restart...
2025-04-02T01:25:18-05:00 INFO Waiting for automatic snapd restart...
2025-04-02T01:25:19-05:00 INFO Waiting for automatic snapd restart...
gtk-common-themes 0.1-81-g442e511 from Canonical✓ refreshed
snapd 2.67.1 from Canonical✓ refreshed
core22 20250210 from Canonical✓ refreshed
firefox 137.0-2 from Mozilla✓ refreshed
firmware-updater 0+git.22198be from Canonical✓ refreshed
gnome-42-2204 0+git.38ea591 from Canonical✓ refreshed
Traceback (most recent call last):
File "/tmp/ubuntu-release-upgrader-sk_u_va9/./plucky", line 8, in <module>
sys.exit(main())
^^^^^^
File "/tmp/ubuntu-release-upgrader-sk_u_va9/DistUpgrade/DistUpgradeMain.py",
line 235, in main
if app.run():
^^^^^^^^^
File
"/tmp/ubuntu-release-upgrader-sk_u_va9/DistUpgrade/DistUpgradeController.py",
line 1962, in run
return self.fullUpgrade()
^^^^^^^^^^^^^^^^^^
File
"/tmp/ubuntu-release-upgrader-sk_u_va9/DistUpgrade/DistUpgradeController.py",
line 1955, in fullUpgrade
elif self._view.confirmRestart():
^^^^^^^^^^^^^^^^^^^^^^^^^^^
File
"/tmp/ubuntu-release-upgrader-sk_u_va9/DistUpgrade/DistUpgradeViewKDE.py", line
869, in confirmRestart
messageBox = QMessageBox(QMessageBox.question, _("Restart required"),
_("<b><big>Restart the system to complete the upgrade</big></b>"),
QMessageBox.StandardButton.NoButton, self.window_main)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
TypeError: arguments did not match any overloaded call:
QMessageBox(parent: Optional[QWidget] = None): argument 1 has unexpected type
'builtin_function_or_method'
QMessageBox(icon: QMessageBox.Icon, title: Optional[str], text:
Optional[str], buttons: QMessageBox.StandardButton = QMessageBox.NoButton,
parent: Optional[QWidget] = None, flags: Qt.WindowType =
Qt.Dialog|Qt.MSWindowsFixedSizeDialogHint): argument 1 has unexpected type
'builtin_function_or_method'
Error in sys.excepthook:
Traceback (most recent call last):
File
"/tmp/ubuntu-release-upgrader-sk_u_va9/DistUpgrade/DistUpgradeViewKDE.py", line
662, in _handleException
apport_crash(exctype, excvalue, exctb)
File
"/tmp/ubuntu-release-upgrader-sk_u_va9/DistUpgrade/DistUpgradeApport.py", line
55, in apport_crash
apport_excepthook('/usr/bin/do-release-upgrade', type, value, tb)
File "/usr/lib/python3/dist-packages/apport_python_hook.py", line 109, in
apport_excepthook
if exc_obj.errno is not None:
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3/dist-packages/apport/report.py", line 785, in
add_proc_info
raise ValueError(f"{self['ExecutablePath']} does not exist")
ValueError: /usr/bin/python3.12 (deleted) does not exist
Original exception was:
Traceback (most recent call last):
File "/tmp/ubuntu-release-upgrader-sk_u_va9/./plucky", line 8, in <module>
sys.exit(main())
^^^^^^
File "/tmp/ubuntu-release-upgrader-sk_u_va9/DistUpgrade/DistUpgradeMain.py",
line 235, in main
if app.run():
^^^^^^^^^
File
"/tmp/ubuntu-release-upgrader-sk_u_va9/DistUpgrade/DistUpgradeController.py",
line 1962, in run
return self.fullUpgrade()
^^^^^^^^^^^^^^^^^^
File
"/tmp/ubuntu-release-upgrader-sk_u_va9/DistUpgrade/DistUpgradeController.py",
line 1955, in fullUpgrade
elif self._view.confirmRestart():
^^^^^^^^^^^^^^^^^^^^^^^^^^^
File
"/tmp/ubuntu-release-upgrader-sk_u_va9/DistUpgrade/DistUpgradeViewKDE.py", line
869, in confirmRestart
messageBox = QMessageBox(QMessageBox.question, _("Restart required"),
_("<b><big>Restart the system to complete the upgrade</big></b>"),
QMessageBox.StandardButton.NoButton, self.window_main)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
TypeError: arguments did not match any overloaded call:
QMessageBox(parent: Optional[QWidget] = None): argument 1 has unexpected type
'builtin_function_or_method'
QMessageBox(icon: QMessageBox.Icon, title: Optional[str], text:
Optional[str], buttons: QMessageBox.StandardButton = QMessageBox.NoButton,
parent: Optional[QWidget] = None, flags: Qt.WindowType =
Qt.Dialog|Qt.MSWindowsFixedSizeDialogHint): argument 1 has unexpected type
'builtin_function_or_method'
** No longer affects: update-manager-core (Ubuntu)
** No longer affects: update-manager-core (Ubuntu Noble)
** No longer affects: update-manager-core (Ubuntu Oracular)
** No longer affects: update-manager-core (Ubuntu Plucky)
** Changed in: ubuntu-release-upgrader (Ubuntu Noble)
Status: Incomplete => Triaged
** Changed in: ubuntu-release-upgrader (Ubuntu Oracular)
Status: Incomplete => Triaged
** Changed in: ubuntu-release-upgrader (Ubuntu Plucky)
Status: Fix Released => Confirmed
** Changed in: ubuntu-release-upgrader (Ubuntu Plucky)
Status: Confirmed => In Progress
** Changed in: ubuntu-release-upgrader (Ubuntu Noble)
Importance: Undecided => Critical
** Changed in: ubuntu-release-upgrader (Ubuntu Plucky)
Assignee: (unassigned) => Simon Quigley (tsimonq2)
** Changed in: ubuntu-release-upgrader (Ubuntu Noble)
Assignee: (unassigned) => Simon Quigley (tsimonq2)
** Changed in: ubuntu-release-upgrader (Ubuntu Oracular)
Assignee: (unassigned) => Simon Quigley (tsimonq2)
** Changed in: ubuntu-release-upgrader (Ubuntu Oracular)
Importance: Undecided => Critical
** Changed in: ubuntu-release-upgrader (Ubuntu Plucky)
Importance: Undecided => Critical
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https://bugs.launchpad.net/bugs/2095535
Title:
ubuntu-release-upgrader Qt interface Qt6 incompatibility
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