Hello,
Yesterday, I updated my system and, maybe nothing to do, but on my home hard drive, I had no more space available. So I free disk space and rebooted.After restarted, plasmashell has crashed. I See black screen, but mouse, other programs, multiple desktops, dolphin, etc--all worked fine. Just no menu bar, no desktop wallpaper. Rebooted, logged in, saw the wallpaper, then it crashed again.
I am unable to start plasmashell
(Note that a new session with new user works perfectly)
Here is the output :

Code: Select all

plasmashell: aucun processus trouvé
buildksycoca5: aucun processus trouvé
kstart(1904) main: Omitting both --window and --windowclass arguments is not recommended
[fred@archlinux-fred ~]$ kf5.karchive: bzDecompress returned -5
org.kde.plasmaquick: Applet preload policy set to 1
Warning: all files used by qml by the plasmoid should be in ui/. The file in the path "file:///usr/share/plasma/plasmoids/org.kde.desktopcontainment/contents/code/LayoutManager.js" was expected at QUrl("file:///usr/share/plasma/plasmoids/org.kde.desktopcontainment/contents/ui/LayoutManager.js")
Warning: all files used by qml by the plasmoid should be in ui/. The file in the path "file:///usr/share/plasma/plasmoids/org.kde.desktopcontainment/contents/code/FolderTools.js" was expected at QUrl("file:///usr/share/plasma/plasmoids/org.kde.desktopcontainment/contents/ui/FolderTools.js")
kf5.kpackage: No metadata file in the package, expected it at: "/home/fred/.local/share/wallpapers/"
kf5.kpackage: No metadata file in the package, expected it at: "/home/fred/.local/share/wallpapers/"
kf5.kpackage: No metadata file in the package, expected it at: "/home/fred/.local/share/wallpapers/"
trying to show an empty dialog
Empty filename passed to function
Empty filename passed to function
trying to show an empty dialog
file:///usr/share/plasma/plasmoids/org.kde.desktopcontainment/contents/ui/FolderItemDelegate.qml:294:17: QML Text: Binding loop detected for property "width"
KActivities: Database connection:  "kactivities_db_resources_140024908683264_readonly"
    query_only:          QVariant(qlonglong, 1)
    journal_mode:        QVariant(QString, "wal")
    wal_autocheckpoint:  QVariant(qlonglong, 100)
    synchronous:         QVariant(qlonglong, 0)
Entry is not valid "kontact.desktop" 0x55e3e5cb8940
Entry is not valid "ktp-contactlist.desktop" 0x55e3e5cb8940
Entry is not valid "org.kde.discover" 0x55e3e5d14130
Entry is not valid "kontact.desktop" 0x55e3e5d1c3c0
Entry is not valid "ktp-contactlist.desktop" 0x55e3e5d1c3c0
Entry is not valid "org.kde.discover" 0x55e3e5d14130
Closing SQL connection:  "kactivities_db_resources_140024908683264_readonly"
KActivities: Database connection:  "kactivities_db_resources_140024908683264_readonly"
    query_only:          QVariant(qlonglong, 1)
    journal_mode:        QVariant(QString, "wal")
    wal_autocheckpoint:  QVariant(qlonglong, 100)
    synchronous:         QVariant(qlonglong, 0)
Nothing to load - the client id is empty
Nothing to load - the client id is empty
Trying to use rootObject before initialization is completed, whilst using setInitializationDelayed. Forcing completion
Trying to use rootObject before initialization is completed, whilst using setInitializationDelayed. Forcing completion
Both point size and pixel size set. Using pixel size.
Both point size and pixel size set. Using pixel size.
Both point size and pixel size set. Using pixel size.
trying to show an empty dialog
Trying to use rootObject before initialization is completed, whilst using setInitializationDelayed. Forcing completion
Connecting to deprecated signal QDBusConnectionInterface::serviceOwnerChanged(QString,QString,QString)
Warning: all files used by qml by the plasmoid should be in ui/. The file in the path "file:///usr/share/plasma/plasmoids/org.kde.panel/contents/code/LayoutManager.js" was expected at QUrl("file:///usr/share/plasma/plasmoids/org.kde.panel/contents/ui/LayoutManager.js")
trying to show an empty dialog
trying to show an empty dialog
trying to show an empty dialog
trying to show an empty dialog
qml: NAMES ONLY false
qml: AUR SUPORTfalse
clicked

org.kde.archupdate: check updates started

org.kde.archUpdate: Your system is up to date, checkupdates returned nothing
org.kde.archUpdate: Your system is up to date, checkupdates and checkupdates-aur returned nothing
qml: NAMES ONLY false
qml: AUR SUPORTfalse
clicked

org.kde.archupdate: check updates started

org.kde.archUpdate: Your system is up to date, checkupdates returned nothing
org.kde.archUpdate: Your system is up to date, checkupdates and checkupdates-aur returned nothing
libkcups: Create-Printer-Subscriptions last error: 0 successful-ok
libkcups: Get-Jobs last error: 0 successful-ok
libkcups: Get-Jobs last error: 0 successful-ok
Warning: all files used by qml by the plasmoid should be in ui/. The file in the path "file:///usr/share/plasma/plasmoids/org.kde.plasma.notifications/contents/code/uiproperties.js" was expected at QUrl("file:///usr/share/plasma/plasmoids/org.kde.plasma.notifications/contents/ui/uiproperties.js")
Plasma Shell startup completed
org.kde.plasmaquick: New Applet  "Menu des applications" with a weight of 100
org.kde.plasmaquick: New Applet  "Lanceur d'application" with a weight of 100
org.kde.plasmaquick: New Applet  "Sélecteur de couleurs" with a weight of 38
org.kde.plasmaquick: New Applet  "Horloge numérique" with a weight of 100
org.kde.plasmaquick: New Applet  "Décompte" with a weight of 18
libkcups: 0
libkcups: 0
networkmanager-qt: void NetworkManager::NetworkManagerPrivate::propertiesChanged(const QVariantMap&) Unhandled property "AllDevices"
networkmanager-qt: void NetworkManager::NetworkManagerPrivate::propertiesChanged(const QVariantMap&) Unhandled property "Capabilities"
networkmanager-qt: void NetworkManager::NetworkManagerPrivate::propertiesChanged(const QVariantMap&) Unhandled property "ConnectivityCheckAvailable"
networkmanager-qt: void NetworkManager::NetworkManagerPrivate::propertiesChanged(const QVariantMap&) Unhandled property "ConnectivityCheckEnabled"
networkmanager-qt: void NetworkManager::NetworkManagerPrivate::propertiesChanged(const QVariantMap&) Unhandled property "Devices"
networkmanager-qt: void NetworkManager::NetworkManagerPrivate::propertiesChanged(const QVariantMap&) Unhandled property "GlobalDnsConfiguration"
networkmanager-qt: virtual void NetworkManager::ActiveConnectionPrivate::propertyChanged(const QString&, const QVariant&) Unhandled property "StateFlags"
networkmanager-qt: virtual void NetworkManager::DevicePrivate::propertyChanged(const QString&, const QVariant&) Unhandled property "LldpNeighbors"
networkmanager-qt: virtual void NetworkManager::DevicePrivate::propertyChanged(const QString&, const QVariant&) Unhandled property "Real"
networkmanager-qt: virtual void NetworkManager::DevicePrivate::propertyChanged(const QString&, const QVariant&) Unhandled property "LldpNeighbors"
networkmanager-qt: virtual void NetworkManager::DevicePrivate::propertyChanged(const QString&, const QVariant&) Unhandled property "Real"
networkmanager-qt: virtual void NetworkManager::DevicePrivate::propertyChanged(const QString&, const QVariant&) Unhandled property "LldpNeighbors"
networkmanager-qt: virtual void NetworkManager::DevicePrivate::propertyChanged(const QString&, const QVariant&) Unhandled property "Real"
networkmanager-qt: virtual void NetworkManager::DevicePrivate::propertyChanged(const QString&, const QVariant&) Unhandled property "LldpNeighbors"
networkmanager-qt: virtual void NetworkManager::DevicePrivate::propertyChanged(const QString&, const QVariant&) Unhandled property "Real"
trying to show an empty dialog
org.kde.plasmaquick: New Applet  "Arch Updater" with a weight of 68
org.kde.plasmaquick: New Applet  "Imprimantes" with a weight of 38
org.kde.plasmaquick: New Applet  "KDE Connect" with a weight of 33
org.kde.plasmaquick: New Applet  "Notification de nouveau périphérique" with a weight of 100
org.kde.plasmaquick: New Applet  "Notifications" with a weight of 100
org.kde.plasmaquick: New Applet  "Presse-papiers" with a weight of 100
org.kde.plasmaquick: New Applet  "Réseaux" with a weight of 100
org.kde.plasmaquick: Delayed preload of  "Menu des applications" after 0 seconds
trying to show an empty dialog


BT

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#0  0x00007fff3cc7b082 in  ()
#1  0x00007ffff4c2eb9e in QV4::ExecutionContext::simpleCall(QV4::Scope&, QV4::CallData*, QV4::Function*) () at /usr/lib/libQt5Qml.so.5
#2  0x00007ffff4d7fa7a in QQmlJavaScriptExpression::evaluate(QV4::CallData*, bool*, QV4::Scope&) () at /usr/lib/libQt5Qml.so.5
#3  0x00007ffff4d8a4f7 in  () at /usr/lib/libQt5Qml.so.5
#4  0x00007ffff4d86fb3 in QQmlBinding::update(QFlags<QQmlPropertyData::WriteFlag>) () at /usr/lib/libQt5Qml.so.5
#5  0x00007ffff4d9407c in QQmlObjectCreator::finalize(QQmlInstantiationInterrupt&) () at /usr/lib/libQt5Qml.so.5
#6  0x00007ffff4d0e283 in  () at /usr/lib/libQt5Qml.so.5
#7  0x00007ffff4d0e86c in QQmlEnginePrivate::incubate(QQmlIncubator&, QQmlContextData*) () at /usr/lib/libQt5Qml.so.5
#8  0x00007ffff4d0b722 in QQmlComponent::create(QQmlIncubator&, QQmlContext*, QQmlContext*) () at /usr/lib/libQt5Qml.so.5
#9  0x00007ffff5ea1912 in KDeclarative::QmlObject::createObjectFromComponent(QQmlComponent*, QQmlContext*, QHash<QString, QVariant> const&) () at /usr/lib/libKF5Declarative.so.5
#10 0x00007ffff798fcaf in  () at /usr/lib/libKF5PlasmaQuick.so.5
#11 0x00007ffff798febc in  () at /usr/lib/libKF5PlasmaQuick.so.5
#12 0x00007ffff7990696 in  () at /usr/lib/libKF5PlasmaQuick.so.5
#13 0x00007ffff1df25a4 in  () at /usr/lib/libQt5Core.so.5
#14 0x00007ffff1de600b in QObject::event(QEvent*) () at /usr/lib/libQt5Core.so.5
#15 0x00007ffff2dbcfec in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#16 0x00007ffff2dc49c6 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#17 0x00007ffff1db4ce0 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#18 0x00007ffff1e10678 in QTimerInfoList::activateTimers() () at /usr/lib/libQt5Core.so.5
#19 0x00007ffff1e10e72 in  () at /usr/lib/libQt5Core.so.5
#20 0x00007fffebd13368 in g_main_context_dispatch () at /usr/lib/libglib-2.0.so.0
#21 0x00007fffebd135b1 in  () at /usr/lib/libglib-2.0.so.0
#22 0x00007fffebd1363e in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#23 0x00007ffff1e11231 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#24 0x00007fffe3fa2482 in  () at /usr/lib/libQt5XcbQpa.so.5
#25 0x00007ffff1db331b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#26 0x00007ffff1dbc718 in QCoreApplication::exec() () at /usr/lib/libQt5Core.so.5
#27 0x000055555556f85a in  ()
#28 0x00007ffff13f606b in __libc_start_main () at /usr/lib/libc.so.6
#29 0x000055555556fc1a in _start ()


sometime I get :

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#0  0x00007fff3c0f4d8d in  ()
#1  0x0000555559398520 in  ()
#2  0x00007fffd2d88010 in  ()
#3  0x00007fffd2d88320 in  ()
#4  0x00007ffff59fba06 in QQuickAnchors::setFill(QQuickItem*) () at /usr/lib/libQt5Quick.so.5
#5  0x0000000000000000 in  ()


Any help really appreciated

I thought it was a widget problem but I finally solved the problem by cleaning the cache :

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$ rm ~/.config/Trolltech.conf
$ kbuildsycoca5 --noincremental
$ kbuildsycoca4 --noincremental
$ rm -rf ~/.cache/*


As a reminder : KDE ArchWiki