Bug 515216

Summary:	Plasmashell freezes and must be killed if there are too many notifications on first log in
Product:	[Plasma] plasmashell	Reporter:	Christian (Fuchs) <kde>
Component:	Notifications	Assignee:	Plasma Bugs List <plasma-bugs-null>
Status:	REPORTED ---
Severity:	major	CC:	kde
Priority:	NOR
Version First Reported In:	6.5.5
Target Milestone:	1.0
Platform:	Other
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Christian (Fuchs) 2026-01-28 19:01:54 UTC

SUMMARY
Plasmashell completley freezes if I have many notifications (e.g. missed calendar events) and log in.
After killing plasmashell hard (SIGKILL on a terminal) and restarting it, the same amount of noitifcations is perfectly fine

STEPS TO REPRODUCE
1.  Configure something that will generate a lot of notifications on log in, e.g. add 20-30 missed calendar events
2. Log in and have plasmashell start up

OBSERVED RESULT
Plasma freezes after the second batch of notifications and must be killed

EXPECTED RESULT
Plasma can handle that

SOFTWARE/OS VERSIONS
Operating System: Fedora Linux 43
KDE Plasma Version: 6.5.5
KDE Frameworks Version: 6.22.0
Qt Version: 6.10.1
Kernel Version: 6.18.5-200.fc43.x86_64 (64-bit)
Graphics Platform: X11
Processors: 16 × AMD Ryzen 7 7700X 8-Core Processor
Memory: 32 GiB of RAM (30.4 GiB usable)
Graphics Processor: NVIDIA GeForce RTX 4080

ADDITIONAL INFORMATION
Reproducible for me all the time if I log in to my desktop after not having it used for a few days (and thus collecting lots of missed calendar event notifications)