Bug 511256

Summary:	Plasmashell crashes when KDE and i3 as WM
Product:	[Plasma] plasmashell	Reporter:	Andrew <constantsy>
Component:	"Manage Desktop and Panels" window	Assignee:	Plasma Bugs List <plasma-bugs-null>
Status:	RESOLVED INTENTIONAL
Severity:	crash	CC:	bjorn.bidar, sepiarovilhar, sitter
Priority:	NOR
Version First Reported In:	6.5.0
Target Milestone:	1.0
Platform:	Other
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Andrew 2025-10-28 09:19:00 UTC

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***

SUMMARY
After an upgrade from KDE 6.4.X to KDE 6.5.0 plasmashell crashed and no panels are available

STEPS TO REPRODUCE
1. Use i3 wm as a window manager
2.
3.

OBSERVED RESULT
plasma shell crashes and I cannot even collect bug report as reported also crashes. When I try to run plasmashell -v , I get this

plasmashell -v
qt.qpa.xcb: could not connect to display
qt.qpa.plugin: From 6.5.0, xcb-cursor0 or libxcb-cursor0 is needed to load the Qt xcb platform plugin.
qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found.
This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.

Available platform plugins are: offscreen, vnc, xcb, minimal, wayland-brcm, wayland-egl, wayland, minimalegl, linuxfb, eglfs, vkkhrdisplay.

[1] 7249 IOT instruction (core dumped) plasmashell -v

EXPECTED RESULT
All panels should be working and available

SOFTWARE/OS VERSIONS
Windows:
macOS:
(available in the Info Center app, or by running `kinfo` in a terminal window)
Linux/KDE Plasma: Arch/KDE+i3wm
KDE Plasma Version: 6.5.0
KDE Frameworks Version:
Qt Version: qmake --version; QMake version 3.1; Using Qt version 5.15.17 in /usr/lib

ADDITIONAL INFORMATION

Comment 1 Harald Sitter 2025-10-28 09:43:56 UTC

Your setup is unfortunately not supported. The error means that Qt failed to find the xserver though, so probably something is wrong with your environment.

Comment 2 Harald Sitter 2025-11-20 06:46:09 UTC

*** Bug 511428 has been marked as a duplicate of this bug. ***

Comment 3 Björn Bidar (Thaodan) 2025-11-20 21:17:46 UTC

(In reply to Harald Sitter from comment #1)
> Your setup is unfortunately not supported. The error means that Qt failed to
> find the xserver though, so probably something is wrong with your
> environment.

How is not supported? Plama has supported using a different WM for ages.
The two bugs are unrelated as the underlying cause for bug is a different one. 
Yes both happen to be when using i3 but the crash is different.