Bug 510317

Summary: Plasmashell repeatedly crashes under Wayland when using Chromium (Flatpak) with media playback (Nobara/Fedora, Plasma 6, Qt6)
Product: [Plasma] plasmashell Reporter: sunface <community.shell>
Component: generic-crashAssignee: Plasma Bugs List <plasma-bugs-null>
Status: RESOLVED WORKSFORME    
Severity: crash CC: kdedev
Priority: NOR    
Version First Reported In: 6.4.4   
Target Milestone: 1.0   
Platform: Other   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description sunface 2025-10-06 19:38:23 UTC 
If you're not sure this is actually a bug, instead post about it at https://discuss.kde.org

If you're reporting a crash, attach a backtrace with debug symbols; see https://community.kde.org/Guidelines_and_HOWTOs/Debugging/How_to_create_useful_crash_reports

Please remove this comment after reading and before submitting - thanks!

SUMMARY
Plasmashell repeatedly crashes under Wayland when playing media in Chromium (Flatpak) on Nobara Linux (Fedora-based, Plasma 6, Qt6). After several crashes, plasmashell fails to restart.

STEPS TO REPRODUCE

- Start KDE Plasma 6 session with Wayland on Nobara Linux (Fedora-based).
- Launch Chromium (Flatpak, latest version).
- Play a YouTube video or other media content.

OBSERVED RESULT
Plasmashell crashes and restarts several times, then fails to start.
Relevant log entries:

Logs:
"plasmashell[3821]: segfault at 10 ip 00007f137f4a0382 sp 00007ffc4bd5ec00 error 4 in libQt6QuickTemplates2.so.6.9.2systemd-coredump[6538]: Process 3821 (plasmashell) of user 1000 terminated abnormally with signal 11/SEGV, processing...systemd[3489]: plasma-plasmashell.service: Main process exited, code=dumped, status=11/SEGVsystemd[3489]: plasma-plasmashell.service: Failed with result 'core-dump'.qrc:/qt/qml/plasma/applet/org/kde/plasma/mediacontroller/main.qml:70:28: QML CompactRepresentation (parent or ancestor of Image): Cannot open: file:///tmp/.org.chromium.Chromium.TdtQ9naudit[7097]: ANOM_ABEND auid=1000 uid=1000 gid=1000 ses=4 subj=flatpak pid=7097 comm="chrome" exe="/app/chromium/chrome" sig=11 res=1audit[7181]: ANOM_ABEND auid=1000 uid=1000 gid=1000 ses=4 subj=flatpak pid=7181 comm="chrome" exe="/app/chromium/chrome" sig=11 res=1audit[7195]: ANOM_ABEND auid=1000 uid=1000 gid=1000 ses=4 subj=flatpak pid=7195 comm="chrome" exe="/app/chromium/chrome" sig=11 res=1"

EXPECTED RESULT
Plasmashell remains stable and does not crash when playing media in Chromium (Flatpak) under Wayland.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Nobara Linux (Fedora-based)
KDE Plasma Version: 6.4.4
KDE Frameworks Version: 6.17.0
Qt Version: 6.9.2
Chromium: Flatpak (latest from Flathub)
Wayland session

ADDITIONAL INFORMATION

- The issue does not occur under X11.
- Disabling hardware acceleration in Chromium reduces crash frequency but does not fully resolve the issue.
- All packages and Flatpak runtimes are up to date.
Comment 1 Antonio Rojas 2025-10-06 19:41:18 UTC 
*** Bug 510318 has been marked as a duplicate of this bug. ***
Comment 2 TraceyC 2025-10-06 20:55:28 UTC 
As the message at the top of the summary says, if something crashed, we need a backtrace of it so we can figure out what's going on. Can you please attach a backtrace of the crash using the coredumpctl command-line program, as detailed in https://community.kde.org/Guidelines_and_HOWTOs/Debugging/How_to_create_useful_crash_reports#Retrieving_a_backtrace_using_coredumpctl ?

Thanks.
Comment 3 Bug Janitor Service 2025-10-21 03:47:26 UTC 
🐛🧹 ⚠️ This bug has been in NEEDSINFO status with no change for at least 15 days. Please provide the requested information, then set the bug status to REPORTED. If there is no change for at least 30 days, it will be automatically closed as RESOLVED WORKSFORME.

For more information about our bug triaging procedures, please read https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging.

Thank you for helping us make KDE software even better for everyone!
Comment 4 Bug Janitor Service 2025-11-05 03:48:02 UTC 
🐛🧹 This bug has been in NEEDSINFO status with no change for at least 30 days. Closing as RESOLVED WORKSFORME.