** Description changed: Title: software-properties-qt crashes on launch with AttributeError: Qt.PartiallyChecked on Kubuntu 26.04 Description: Every time I launch software-properties-qt on Kubuntu 26.04, it immediately crashes. Steps to reproduce: 1. Open terminal 2. Run: software-properties-qt Expected result: The Software Sources window opens normally. Actual result: The application crashes immediately with: Traceback (most recent call last): File "/usr/bin/software-properties-qt", line 130, in <module> app = SoftwarePropertiesQt(datadir=data_dir, options=options, file=afile, attachWinID=attachWinID) File "/usr/lib/python3/dist-packages/softwareproperties/qt/SoftwarePropertiesQt.py", line 164, in __init__ self.show_distro() ~~~~~~~~~~~~~~~~^^ File "/usr/lib/python3/dist-packages/softwareproperties/qt/SoftwarePropertiesQt.py", line 376, in show_distro child.setCheckState(Qt.PartiallyChecked) ^^^^^^^^^^^^^^^^^^^ AttributeError: type object 'Qt' has no attribute 'PartiallyChecked' And trying to run it through pkexec reveals that the history repeats - itself again and again as it seems to be a time problem that keeps + itself again and again as it seems to be a chronic problem that keeps happening on most new releases. andygl@hp15s:~$ pkexec software-properties-qt - qt.qpa.xcb: could not connect to display + qt.qpa.xcb: could not connect to display qt.qpa.plugin: From 6.5.0, xcb-cursor0 or libxcb-cursor0 is needed to load the Qt xcb platform plugin. qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found. This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem. Available platform plugins are: eglfs, minimalegl, wayland-brcm, wayland-egl, wayland, vnc, minimal, linuxfb, vkkhrdisplay, xcb, offscreen. Aborted (core dumped) pkexec software-properties-qt - andygl@hp15s:~$ - - + andygl@hp15s:~$ System: * Kubuntu 26.04 * Happens every launch * Installed via normal system packages Additional information: Possibly related to a Qt/PyQt API change where Qt.PartiallyChecked may now live under Qt.CheckState.PartiallyChecked. Package: software-properties-qt 0.120 ApportVersion: 2.34.0-0ubuntu2 Arch: amd64 OS: Kubuntu 25.10 "Questing Quokka" - Release amd64 (20251007) Upgrade status: Upgraded to resolute on 2026-05-22 (3 days ago) Uname: Linux 7.0.0-15-generic x86_64
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2154196 Title: Software properties qt wont launch because of syntax errors in its code - Kubuntu 26.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/software-properties/+bug/2154196/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
