Bug 489313

Summary:	With CatWalk widget on panel, phanging position of the Desktop Panel in Edit Mode freezes Edit Mode, needs to kill plasmashell process
Product:	[Plasma] plasmashell	Reporter:	paninomaninodesu
Component:	Edit Mode	Assignee:	Plasma Bugs List <plasma-bugs-null>
Status:	RESOLVED DOWNSTREAM
Severity:	major	CC:	lg096066587039, nate, postix
Priority:	NOR
Version First Reported In:	6.1.1
Target Milestone:	1.0
Platform:	Neon
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:
Attachments:	attachment-3370006-0.html Flamegraph, when CatWalk runs wild

Description paninomaninodesu 2024-06-27 14:33:13 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
***

SUMMARY
It's not possible to change the position of the desktop panel

STEPS TO REPRODUCE
1. Right Click on Panel and Show Panel Configurations
2. Try to change Panel Position
3. 

OBSERVED RESULT
Panel goes to the position you selects, but the while rearranging the items attached to it Edit Mode freezes

EXPECTED RESULT
Panel changes position and all items are rearranged without failing

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: Neon User
(available in About System)
KDE Plasma Version: 6.1.1
KDE Frameworks Version: 6.3
Qt Version: 6.7.0

ADDITIONAL INFORMATION
Happened while I was writing this thread on Discuss KDE: https://discuss.kde.org/t/some-ui-elements-on-the-desktop-are-too-big-in-low-resolution-screen-1366x768/17856

Normally I use  the panel on the left. To better illustrate the exemple there I changed the position to the bottom to take a screenshot, when I tried to change the position again to the left it happened. Now I'm stuck with the panel on the bottom.

Restarted the system and tried on both X11 and Wayland.

Comment 1 Nate Graham 2024-06-27 19:48:44 UTC

If you change the panel's alignment to something other than centered, does the issue go away? If so, this should have been fixed by Bug 488174.

Comment 2 paninomaninodesu 2024-06-28 17:24:08 UTC

Created attachment 171137 [details]
attachment-3370006-0.html

Tried changing all parameters and move the panel to all positions to see
what would happen. No combination worked.
But then I tried a few more things, tried removing widgets from the panel
one by one. When I removed Catwalk it worked, so that was the problem?

For me it's "fixed", the but seems to be on Catwalk.

Em qui., 27 de jun. de 2024 às 17:28, Nate Graham <bugzilla_noreply@kde.org>
escreveu:

> https://bugs.kde.org/show_bug.cgi?id=489313
>
> Nate Graham <nate@kde.org> changed:
>
>            What    |Removed                     |Added
>
> ----------------------------------------------------------------------------
>              Status|REPORTED                    |NEEDSINFO
>          Resolution|---                         |WAITINGFORINFO
>                  CC|                            |nate@kde.org
>
> --- Comment #1 from Nate Graham <nate@kde.org> ---
> If you change the panel's alignment to something other than centered, does
> the
> issue go away? If so, this should have been fixed by Bug 488174.
>
> --
> You are receiving this mail because:
> You reported the bug.

Comment 3 Nate Graham 2024-06-28 18:01:19 UTC

Yep, that's it. See my comment on https://store.kde.org/p/2137844. :(

I rewrote the widget to fix this and passed it on to the author, but it looks like it hasn't been updated with those changes yet.

Comment 4 Nate Graham 2024-10-10 20:32:45 UTC

*** Bug 494258 has been marked as a duplicate of this bug. ***

Comment 5 postix 2025-08-01 10:54:30 UTC

Created attachment 183703 [details]
Flamegraph, when CatWalk runs wild

I've been running an older version of CatWalk, namely 2.1 and ran into this as well on Plasma 6.4.3

Nate, do you think this is a purely downstream issue or not rather an upstream Qt issue, which should be reported and fixed? Something seems to trigger an endless loop. Please the attached flamegraph.

Secondly, if those applets ran in a different thread, wouldn't it help to keep the main plasmashell unblocked in such cases and be considered for a future architecture?

Comment 6 Nate Graham 2025-08-07 15:47:56 UTC

It's purely a CatWalk issue.

While it would be nice if 3rd-party widgets couldn't blow up Plasmashell, that would require major re-architecting. There are  thoughts about sandboxing widgets and running them in separate processes, but they haven't been fleshed out into concrete plans yet.