Bug 509756

Summary:	Panel freezes after a couple of seconds after 14/09/2025 update
Product:	[KDE Neon] neon	Reporter:	MathieuM <mathieu>
Component:	Packages User Edition	Assignee:	Neon Bugs <neon-bugs>
Status:	REPORTED ---
Severity:	normal	CC:	carlosd.kde, jr, nate, neon-bugs, niccolo.venerandi
Priority:	NOR
Version First Reported In:	unspecified
Target Milestone:	---
Platform:	Neon
OS:	Linux
Latest Commit:		Version Fixed In:
Sentry Crash Report:
Attachments:	List of updates journalctl -b -r from panel crash

Description MathieuM 2025-09-21 16:34:45 UTC

SUMMARY
After installing an update coming back from holidays on 14/09/2025, the panel (and it seems Alt+F2 too) freezes after a couple of seconds of use. I can open my browser and apps, but when trying to hover, it shows the thumbnail preview, and stays there. I can't from that point on interact with the panel at all.
The system remains active, as I can use my web browser and terminal

STEPS TO REPRODUCE
1. Open a couple of programs
2. Hover them in panel to have the thumbnail preview
3. 

OBSERVED RESULT
Panel fully freezes

EXPECTED RESULT
Panel should keep responding

SOFTWARE/OS VERSIONS
Linux Kernel : 6.14.0-29-generic
KDE Plasma Version: 6.4.5
KDE Frameworks Version: 6.18.0
Qt Version: 6.9.2

Comment 1 Nate Graham 2025-09-23 17:14:44 UTC

Sorry this is happening. Can you reproduce the issue in a new clean user account on the same machine?

Comment 2 MathieuM 2025-09-24 09:55:04 UTC

Created attachment 185207 [details]
List of updates

Comment 3 MathieuM 2025-09-24 09:57:20 UTC

Hi, yes. I've created a new user with adduser and could reproduce the bug after installing all updates from the updates tab in discover.

I've attached the list of updates.

Worth noting perhaps that I have a popup when I open the updates tab that reads:
"E: The repository 'https://ppa.launchpadcontent.net/jfi/ppa/ubuntu noble Release' does not have a Release file.
W: Updating from such a repository can't be done securely, and is therefore disabled by default.
W: See apt-secure(8) manpage for repository creation and user configuration details."

Also, here's a pastebin with details of what "system upgrade" contains https://pastebin.com/JvFASYfy

Comment 4 MathieuM 2025-09-24 12:31:16 UTC

Also, I did try to install only the system upgrades, but got the same issue

Comment 5 Nate Graham 2025-09-24 18:15:56 UTC

Thanks. As this could be a packaging or local configuration issue, I'm moving the bug report to Neon for further triage.

Comment 6 Carlos De Maine 2025-09-28 02:36:48 UTC

sounds like a plasma-shell issue .  could you look in the journal and report back anything odd .  journalctl -b -r will give the latest entries in the journal in reverse oder

Comment 7 MathieuM 2025-09-30 14:27:49 UTC

Created attachment 185398 [details]
journalctl -b -r from panel crash

Comment 8 MathieuM 2025-09-30 14:29:18 UTC

(In reply to Carlos De Maine from comment #6)
> sounds like a plasma-shell issue .  could you look in the journal and report
> back anything odd .  journalctl -b -r will give the latest entries in the
> journal in reverse oder

Hi, after further investigation it looks like it only happens if I have tooltips (aka preview of windows in the panel) enabled.
No problem when disabled, but 100% when enabled.

I've attached the output of journalctl -b -r in the attachments above. I'm not great at knowing what's odd, but I do see a lot of 
> plasmashell[2307]: kpipewire_logging: PipeWire remote error:  -2