STEPS TO REPRODUCE 1. I updated my Gentoo Linux machines with KDE to latest stable versions of everything. OBSERVED RESULT Suddenly nm-applet stopped working and kded5 keeps crashing approx. once per second: Apr 30 21:38:18 b360 kded5[72702]: Installing the delayed initialization callback. Apr 30 21:38:18 b360 NetworkManager[2047]: <info> [1651347498.1476] agent-manager: agent[9abe7988027e87ba,:1.1684/org.kde.plasma.networkmanagement/1026]: agent registered Apr 30 21:38:18 b360 systemd-coredump[72705]: elfutils disabled, parsing ELF objects not supported Apr 30 21:38:18 b360 systemd-coredump[72705]: [🡕] Process 72675 (kded5) of user 1026 dumped core. Apr 30 21:38:18 b360 systemd[1]: systemd-coredump@1617-72703-0.service: Deactivated successfully. Apr 30 21:38:18 b360 kded5[72702]: kcm_touchpad: Using X11 backend Apr 30 21:38:18 b360 kded5[72702]: kf.config.core: Use of KConfigWatcher without DBus support. You will not receive updates Apr 30 21:38:19 b360 systemd[1]: Started Process Core Dump (PID 72728/UID 0). Apr 30 21:38:19 b360 systemd-coredump[72730]: Removed old coredump core.kded5.1026.d127f538c70549308c91f1781604c632.5497.1651342781000000.zst. EXPECTED RESULT No crashes after update to stable release. SOFTWARE/OS VERSIONS Linux: 5.15.32-gentoo-r1-x86_64 KDE Plasma Version: 5.24.4 KDE Frameworks Version: 5.92.0 Qt Version: 5.15.3 ADDITIONAL INFORMATION (gdb) bt #0 0x00007fe9d156a06c in () at /lib64/libc.so.6 #1 0x00007fe9d151e792 in raise () at /lib64/libc.so.6 #2 0x00007fe9d256985c in KCrash::defaultCrashHandler(int) () at /usr/lib64/libKF5Crash.so.5 #3 0x00007fe9d151e830 in <signal handler called> () at /lib64/libc.so.6 #4 KConfigBase::isGroupImmutable(QByteArray const&) const (this=0x0, aGroup=...) at /var/tmp/portage/kde-frameworks/kconfig-5.92.0/work/kconfig-5.92.0/src/core/kconfigbase.cpp:78 #5 0x00007fe9d1f175f8 in KConfigGroupPrivate::KConfigGroupPrivate(QExplicitlySharedDataPointer<KSharedConfig> const&, QByteArray const&) (name=..., owner=..., this=0x563740d6fe80) at /usr/include/qt5/QtCore/qshareddata.h:161 #6 KConfigGroup::KConfigGroup(QExplicitlySharedDataPointer<KSharedConfig> const&, QString const&) (this=this@entry=0x7ffefe2c2c30, master=..., _group=...) at /var/tmp/portage/kde-frameworks/kconfig-5.92.0/work/kconfig-5.92.0/src/core/kconfiggroup.cpp:491 #7 0x00007fe9c4012764 in LocationUpdater::resetLocator() (this=0x563740d58cf0) at /var/tmp/portage/kde-plasma/plasma-workspace-5.24.4/work/plasma-workspace-5.24.4/libcolorcorrect/kded/locationupdater.cpp:28 #8 0x00007fe9c4012ffa in KPluginFactory::createInstance<LocationUpdater, QObject>(QWidget*, QObject*, QList<QVariant> const&) (parentWidget=<optimized out>, parent=<optimized out>, args=...) at /usr/include/KF5/KCoreAddons/kpluginfactory.h:875 #9 0x00007fe9d1e99272 in KPluginFactory::create(char const*, QWidget*, QObject*, QList<QVariant> const&, QString const&) (this= 0x563740cc8150, iface=0x7fe9d2586360 "KDEDModule", parentWidget=0x0, parent=0x563740af2930, args=..., keyword=...) at /var/tmp/portage/kde-frameworks/kcoreaddons-5.92.0/work/kcoreaddons-5.92.0/src/lib/plugin/kpluginfactory.cpp:232 #10 0x000056374098a0c0 in () #11 0x000056374098d0b2 in () #12 0x000056374098d443 in () #13 0x000056374098712a in () #14 0x00007fe9d150a2fa in () at /lib64/libc.so.6 #15 0x00007fe9d150a3a8 in __libc_start_main () at /lib64/libc.so.6 #16 0x0000563740987541 in () I do not need NightColor. If I comment out the body of LocationUpdater::resetLocator(), kded5 no longer crashes and everything seems to work as expected.
The cause is similar to bug #423864 comment #4: m_configWatcher->config() for some reason returns nullptr.
*** Bug 453734 has been marked as a duplicate of this bug. ***
Please attach your ~/.config/kwinrc file, then we can check how the code behaves with your config file and see if the issue can be reproduced. On my system and kdesrc-build setups, it works as expected without crashing.
Not having the exact same problem as mentioned in this report since I don't have nm-applet installed but as I mentioned in bug report 453734 there seems to be an issue with location service. When I run command 'kded5 --replace' it gives: kf.coreaddons: "Could not load plugin from /usr/lib/qt/plugins/plasma/geolocationprovider/plasma-geolocation-gps.so: Cannot load library /usr/lib/qt/plugins/plasma/geolocationprovider/plasma-geolocation-gps.so: (libgps.so.29: cannot open shared object file: No such file or directory)" Hence night color location service does not work.
@raguse Do you experience any crash though?
(In reply to Alexander Lohnau from comment #5) > @raguse Do you experience any crash though? No, no crash at all at the frontend (plasmashell). I haven't check logs systematically but I get the repeated error with kded5 --replace or also kcmshell5 kcm_nightcolor. Like said, I don't have nm-applet installed.
(In reply to raguse from comment #6) > (In reply to Alexander Lohnau from comment #5) > > @raguse Do you experience any crash though? > > No, no crash at all at the frontend (plasmashell). I haven't check logs > systematically but I get the repeated error with kded5 --replace or also > kcmshell5 kcm_nightcolor. Like said, I don't have nm-applet installed. So I just compared to a virtual machine installation that runs the same OS like I have on my machine but with Plasma 5.24.2 and Frameworks 5.91 (Qt 5.15.2) and there I get the same error as just reported but definitely the location detection service with kcm_nightcolor works. With Plasma 5.24.5 and FW 5.93 now I have these errors in addition: file:///usr/lib/qt/qml/org/kde/kirigami.2/ApplicationItem.qml:151:9: QML Shortcut: Shortcut: Only binding to one of multiple key bindings associated with 13. Use 'sequences: [ <key> ]' to bind to all of them. file:///usr/lib/qt/qml/org/kde/kirigami.2/ApplicationItem.qml:147:9: QML Shortcut: Shortcut: Only binding to one of multiple key bindings associated with 14. Use 'sequences: [ <key> ]' to bind to all of them. So I don't know now where the error comes from now, Frameworks or NetworkManager.
I was observing the crashes (approx. one crash per second) on multiple machines after the update. It did not seem related to anything specific in ~/.config/kwinrc. On one of the machines the file has this content: [$Version] update_info=kwin.upd:enable-scale-effect-by-default [Compositing] Enabled=false OpenGLIsUnsafe=false [Desktops] Id_1=80512e95-79c0-44cc-9d1d-8d0c892714de Number=1 Rows=1 On another machine the file has this content: [$Version] update_info=kwin.upd:replace-scalein-with-scale,kwin.upd:port-minimizeanimation-effect-to-js,kwin.upd:port-scale-effect-to-js,kwin.upd:port-dimscreen-effect-to-js,kwin.upd:auto-bordersize,kwin.upd:animation-speed,kwin.upd:desktop-grid-click-behavior,kwin.upd:no-swap-encourage,kwin.upd:make-translucency-effect-disabled-by-default,kwin.upd:remove-flip-switch-effect,kwin.upd:remove-cover-switch-effect,kwin.upd:remove-cubeslide-effect,kwin.upd:remove-xrender-backend,kwin.upd:enable-scale-effect-by-default [Compositing] Enabled=false OpenGLIsUnsafe=true [Desktops] Id_1=2545027f-687a-4bc2-9d8c-ad4e20f1c3b8 Number=1 Rows=1 [org.kde.kdecoration2] BorderSize=Normal BorderSizeAuto=false ButtonsOnLeft=MS ButtonsOnRight=HIAX CloseOnDoubleClickOnMenu=false ShowToolTips=true library=org.kde.kwin.aurorae theme=kwin4_decoration_qml_plastik
Out of curiosity I just upgraded all NetworkManager packages within my mentioned virtual machine where night color location service is still working to the latest versions. That includes plasma-nm version 5.24-5-1, networkmanager-qt, NM version 1.36.4-1 amongst others. Night color location service detection still works with plasma 5.24.2 and FW 5.91. I think we can exclude NetworManager as the cause.
Another update: The issue reported by me in bug report 453734 seems to be solved with Frameworks 5.94 which I just applied on an VM Arch install which was released today to the repository. I do get location information again in kcm_nightlight. Hopefully it is the same on my main machine with Manjaro once I get the packages in the repo. That leaves the issue left from kded crash as originally reported here. Hopefully it's also fixed for the reporting person. The VM OS Info I used: Operating System: Arch Linux KDE Plasma Version: 5.24.5 KDE Frameworks Version: 5.94.0 Qt Version: 5.15.4 Kernel Version: 5.17.7-arch1-1 (64-bit) Graphics Platform: X11 Processors: 2 × Intel® Core™ i5-4210Y CPU @ 1.50GHz Memory: 3,8 GiB of RAM Graphics Processor: SVGA3D; build: RELEASE; LLVM;
> kf.coreaddons: "Could not load plugin from /usr/lib/qt/plugins/plasma/geolocationprovider/plasma-geolocation-gps.so: > Cannot load library /usr/lib/qt/plugins/plasma/geolocationprovider/plasma-geolocation-gps.so: > (libgps.so.29: cannot open shared object file: No such file or directory)" This is caused by a local installation issue: missing file, or non-recompiled library. Check your installation. Since you're on Gentoo, maybe just give everything a clean build to be safe.
(In reply to Nate Graham from comment #11) > > kf.coreaddons: "Could not load plugin from /usr/lib/qt/plugins/plasma/geolocationprovider/plasma-geolocation-gps.so: > > Cannot load library /usr/lib/qt/plugins/plasma/geolocationprovider/plasma-geolocation-gps.so: > > (libgps.so.29: cannot open shared object file: No such file or directory)" > This is caused by a local installation issue: missing file, or > non-recompiled library. Check your installation. Since you're on Gentoo, > maybe just give everything a clean build to be safe. @Nate I guess it's because my Notebook machine is not a GPS device. I interpret it like this. Anyway the location service in night color seems solved now with FW 5.94 upgrade. Many thanks!!
I do not think that the problem reported in comment #0 has been resolved. Bug #453734 has obviously not much in common with the SIGSEGV captured in comment #0. m_configWatcher->config() could hardly become nullptr due to missing plasma-geolocation-gps.so.
The problem reported in comment #0 was actually caused by bug #457285.