https://bugs.kde.org/show_bug.cgi?id=521056
Bug ID: 521056
Summary: python3-pyqt6 stuck at 6.10.0 while Neon ships
Qt6/PySide6 6.11.1 - PyQt6.QtMultimedia fails
(undefined symbol)
Classification: KDE Neon
Product: neon
Version First unspecified
Reported In:
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: Packages User Edition
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected]
Target Milestone: ---
Created attachment 192878
--> https://bugs.kde.org/attachment.cgi?id=192878&action=edit
apt policy + repro on Neon User Edition
DESCRIPTION
On KDE Neon User Edition, Qt6 and PySide6 are at 6.11.1 but python3-pyqt6 is
frozen at 6.10.0 (a Neon build, +build3 — not the Ubuntu package, just not
bumped to 6.11.x). PyQt6 therefore lags one minor version behind the shipped
Qt, so importing PyQt6.QtMultimedia fails with an undefined symbol. The PySide6
equivalent works, because it is kept aligned with Qt.
STEPS TO REPRODUCE
1. On a stock KDE Neon User Edition: python3 -c "from PyQt6 import
QtMultimedia"
2. Compare: python3 -c "from PySide6 import QtMultimedia; print('ok')"
3. Check versions: apt policy python3-pyqt6 python3-pyside6.qtmultimedia
qt6-multimedia
OBSERVED RESULT
PyQt6.QtMultimedia fails to import:
ImportError: /usr/lib/python3/dist-packages/PyQt6/QtMultimedia.abi3.so:
undefined symbol: _Zls6QDebugN17QVideoFrameFormat11PixelFormatE, version Qt_6
(the symbol demangles to: operator<<(QDebug, QVideoFrameFormat::PixelFormat) —
present in libQt6Multimedia.so.6.11.1, but PyQt6 6.10.0 was built against the
6.10 ABI.)
PySide6.QtMultimedia imports fine ("ok").
Installed versions:
qt6-multimedia 6.11.1-0zneon+24.04+noble+release+build55
python3-pyside6.qtmultimedia 6.11.1-0zneon+24.04+noble+release+build87
python3-pyqt6 6.10.0-1+24.04+noble+release+build3
`apt full-upgrade` does not help (no 6.11.x build of python3-pyqt6 in
archive.neon.kde.org/user).
EXPECTED RESULT
PyQt6.QtMultimedia imports without error (as PySide6.QtMultimedia does), i.e.
python3-pyqt6 is built at 6.11.x to match the shipped Qt 6.11.1.
SOFTWARE/OS VERSIONS
Operating System: KDE neon User Edition
KDE Plasma Version: 6.6.5
KDE Frameworks Version: 6.26.0
Qt Version: 6.11.1
Kernel: 6.17.0-35-generic (64-bit)
ADDITIONAL INFORMATION
Any PyQt6 application that uses QtMultimedia is broken on Neon, while the
PySide6 equivalents work. Example: Dictée
(https://github.com/rcspam/dictee/issues/13) had to disable its in-app audio
(player + microphone level meter) on Neon as a workaround.
Request: build python3-pyqt6 6.11.x against Neon's Qt 6.11.1 (as is already
done for PySide6), so PyQt6 stays version-aligned with the shipped Qt — or
document the gap.
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