Bug 508368

Summary:	Some applications in favorites does not launch after long sessions
Product:	[Plasma] plasmashell	Reporter:	roguegreat
Component:	Application Launcher (Kickoff) widget	Assignee:	Plasma Bugs List <plasma-bugs-null>
Status:	RESOLVED DOWNSTREAM
Severity:	normal	CC:	mikel5764, nate, noahadvs
Priority:	NOR
Version First Reported In:	6.4.4
Target Milestone:	1.0
Platform:	NixOS
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description roguegreat 2025-08-17 06:20:03 UTC

SUMMARY
Cannot figure out what causes it and journal logs does not give any information. Problem has been happening for a several months and possibly longer than that. Restarting plasmashell fixes the problem for a while.

STEPS TO REPRODUCE
1. Have plasma run for a while (do tasks, lock screen, sleep, etc.)
2. Click on an application to launch it from the favorites menu
3. Application does not launch
4. Restart plasmashell
5. Application launches from favorites

OBSERVED RESULT
Application does not launch from favorites

EXPECTED RESULT
Application does launch from favorites

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
(available in the Info Center app, or by running `kinfo` in a terminal window)
Linux/KDE Plasma: NixOS 25.11
KDE Plasma Version: 6.4.4
KDE Frameworks Version: 6.17.0
Qt Version: 6.9.1

ADDITIONAL INFORMATION
There was an additional bug encountered with tooltips being offset by a lot when hovering over an app in favorites. Minor issue in comparison.

Comment 1 Nate Graham 2025-08-18 20:47:47 UTC

Does the app launch if you use its command-line binary in a terminal window? e.g `Kate` for the Kate app and `plasma-discover` for Discover.

Does the issue ever happen in a new clean user account on the same computer?

Comment 2 roguegreat 2025-08-20 15:59:55 UTC

It's only an issue with launching from favorites and it doesn't seem to affect every app in there. I can always launch from the command line or from application categories/search.

Have to check if this affects new user accounts.

Comment 3 roguegreat 2025-08-30 00:05:38 UTC

I think I figured out what's causing it and it's probably NixOS related. This seems to happen sometimes during a `nixos-rebuild switch` happens (equivalent to a system update).

Comment 4 Nate Graham 2025-09-01 21:49:38 UTC

Let us know what you find there!