Bug 466567

Summary:	Kded crash at startup in KDecoration2::Decoration::setSettings()
Product:	[Plasma] kwin	Reporter:	NicolasB <nicolas.baillard>
Component:	decorations	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED FIXED
Severity:	crash	CC:	kde, markus.laker, nate
Priority:	NOR
Version:	5.27.1
Target Milestone:	---
Platform:	Fedora RPMs
OS:	Linux
Latest Commit:		Version Fixed In:
Sentry Crash Report:

Description NicolasB 2023-02-27 23:09:04 UTC

SUMMARY
kded5 crash with a segmentation fault just after login. As a result the desktop is mostly unusable.
The crash handler is unable to report the issue arguing that "kded5 does not provide a bug reporting address". But after some digging I got this backtrace : https://retrace.fedoraproject.org/faf/reports/625180/


STEPS TO REPRODUCE
1. Login into the session

OBSERVED RESULT
The Crash handler reports that kded5 closed unexpectedly.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Fedora Linux 36 (KDE Plasma) x86_64
KDE Plasma Version: Plasma 5.27.1
KDE Frameworks Version: 5.103.0
Qt Version: 5.15.7

ADDITIONAL INFORMATION
Problem happens on both X11 and Wayland.

Comment 1 Nate Graham 2023-02-28 21:55:10 UTC

Relevant part:

KDecoration2::Decoration::setSettings(QSharedPointer<KDecoration2::DecorationSettings> const&) 
ConfigValueProvider::windowDecorationsButtonsImages() const
GtkConfig::setWindowDecorationsAppearance() const 
GtkConfig::applyAllSettings() const 
GtkConfig::GtkConfig(QObject*, QList<QVariant> const&) 

Issue appears to be in kde-gtk-config or kdecoration Starting in kdecoration since that's what provided the kded module.

Comment 2 Markus Laker 2023-03-08 22:44:48 UTC

I suffered from the same bug.  In addition, systemsettings crashed (and still does crash) when I went into the Window Decorations module.

After several retries, I managed to change the window decorations from Plastik to Translucent; then I logged out and logged back in again.  This has stopped kded5 from crashing.

In systemsettings, you may be able to change window decorations without going into the Window Decorations module: go into "Appearance — Global Theme", click on a theme, and then click "Choose what to apply...".

Comment 3 NicolasB 2023-04-12 18:02:09 UTC

Problem no longer occurs with recent updates. Maybe it was fixed upstream.