Hola.
En mi caso he identificado que el error es de plasmashell.
Al iniciarlo con el panel predeterminado, tal como viene por defecto después de una instalación nueva y el posterior upd, me da estos errores:
[usuario@pc ~]$ plasmashell
kscreen: starting external backend launcher for ""
org.kde.plasma: unversioned plugin detected, may result in instability
org.kde.plasma: unversioned plugin detected, may result in instability
org.kde.plasma: unversioned plugin detected, may result in instability
org.kde.plasma: unversioned plugin detected, may result in instability
org.kde.plasma: unversioned plugin detected, may result in instability
org.kde.plasma: unversioned plugin detected, may result in instability
org.kde.plasma: unversioned plugin detected, may result in instability
Connecting to deprecated signal QDBusConnectionInterface::serviceOwnerChanged(QString,QString,QString)
file:///usr/lib/qt5/qml/org/kde/plasma/extras/ScrollArea.qml:48: Error: Cannot assign to non-existent property "interactive"
file:///usr/lib/qt5/qml/QtQuick/Controls/Button.qml:96: TypeError: Cannot read property of null
file:///usr/lib/qt5/qml/QtQuick/Controls/Button.qml:96: TypeError: Cannot read property of null
file:///usr/lib/qt5/qml/QtQuick/Controls/Button.qml:96: TypeError: Cannot read property of null
file:///usr/share/plasma/plasmoids/org.kde.plasma.taskmanager/contents/ui/ToolTipDelegate.qml:220: TypeError: Cannot read property '0' of undefined
file:///usr/share/plasma/plasmoids/org.kde.plasma.taskmanager/contents/ui/ToolTipDelegate.qml:209: TypeError: Cannot read property '0' of undefined
file:///usr/lib/qt5/qml/QtQuick/Controls/Button.qml:96: TypeError: Cannot read property of null
QObject::connect: invalid null parameter
file:///usr/share/plasma/plasmoids/org.kde.plasma.digitalclock/contents/ui/main.qml:51: TypeError: Cannot read property 'width' of null
file:///usr/share/plasma/plasmoids/org.kde.plasma.digitalclock/contents/ui/main.qml:52: TypeError: Cannot read property 'width' of null
file:///usr/share/plasma/plasmoids/org.kde.plasma.digitalclock/contents/ui/main.qml:53: TypeError: Cannot read property 'height' of null
file:///usr/share/plasma/plasmoids/org.kde.plasma.digitalclock/contents/ui/main.qml:54: TypeError: Cannot read property 'height' of null
file:///usr/share/plasma/plasmoids/org.kde.plasma.digitalclock/contents/ui/Tooltip.qml:43: TypeError: Cannot read property 'timeFormat' of null
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.
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.
Both point size and pixel size set. Using pixel size.
Both point size and pixel size set. Using pixel size.
file:///usr/share/plasma/plasmoids/org.kde.plasma.digitalclock/contents/ui/DigitalClock.qml:443:5: QML Text: Cannot anchor to a null item.
Both point size and pixel size set. Using pixel size.
Both point size and pixel size set. Using pixel size.
Known plasmoid ids: QHash(("org.kde.plasma.networkmanagement", 18)("org.kde.plasma.notifications", 11)("org.kde.plasma.battery", 15)("org.kde.plasma.volume", 14)("org.kde.plasma.bluetooth", 17)("org.kde.ktp-contactlist", 16)("org.kde.plasma.printmanager", 9)("org.kde.plasma.devicenotifier", 12)("org.kde.kdeconnect", 10)("org.kde.plasma.clipboard", 13))
org.kde.plasma: unversioned plugin detected, may result in instability
<Unknown File>: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
<Unknown File>: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
<Unknown File>: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
<Unknown File>: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
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
file:///usr/share/plasma/plasmoids/org.kde.plasma.systemtray/contents/ui/TaskDelegate.qml:156: TypeError: Cannot read property 'taskItem' of undefined
org.kde.plasma: unversioned plugin detected, may result in instability
<Unknown File>: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
<Unknown File>: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
<Unknown File>: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
<Unknown File>: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
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.
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.
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.
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.
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.
Both point size and pixel size set. Using pixel size.
file:///usr/share/plasma/plasmoids/org.kde.plasma.taskmanager/contents/ui/ToolTipDelegate.qml:220: TypeError: Cannot read property '0' of undefined
file:///usr/share/plasma/plasmoids/org.kde.plasma.taskmanager/contents/ui/ToolTipDelegate.qml:209: TypeError: Cannot read property '0' of undefined
file:///usr/share/plasma/plasmoids/org.kde.plasma.systemtray/contents/ui/TaskDelegate.qml:156: TypeError: Cannot read property 'taskItem' of undefined
<Unknown File>: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
<Unknown File>: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
<Unknown File>: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
<Unknown File>: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
Notifications service registered
XSync seems available and ready
XSync Inited
Supported, init completed
file:///usr/lib/qt5/qml/QtQuick/Controls/Button.qml:96: TypeError: Cannot read property of null
file:///usr/lib/qt5/qml/QtQuick/Controls/Button.qml:96: TypeError: Cannot read property of null
file:///usr/lib/qt5/qml/QtQuick/Controls/Button.qml:96: TypeError: Cannot read property of null
file:///usr/lib/qt5/qml/QtQuick/Controls/Button.qml:96: TypeError: Cannot read property of null
file:///usr/lib/qt5/qml/QtQuick/Controls/Button.qml:96: TypeError: Cannot read property of null
file:///usr/lib/qt5/qml/QtQuick/Controls/Button.qml:96: TypeError: Cannot read property of null
file:///usr/share/plasma/plasmoids/org.kde.plasma.systemtray/contents/ui/TaskDelegate.qml:156: TypeError: Cannot read property 'taskItem' of undefined
org.kde.plasma: unversioned plugin detected, may result in instability
<Unknown File>: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
<Unknown File>: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
<Unknown File>: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
<Unknown File>: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/plasma/plasmoids/org.kde.plasma.systemtray/contents/ui/TaskDelegate.qml:156: TypeError: Cannot read property 'taskItem' of undefined
org.kde.plasma: unversioned plugin detected, may result in instability
<Unknown File>: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
<Unknown File>: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
<Unknown File>: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
<Unknown File>: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
org.kde.plasma: unversioned plugin detected, may result in instability
file:///usr/share/plasma/plasmoids/org.kde.plasma.clipboard/contents/ui/clipboard.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/plasma/plasmoids/org.kde.plasma.clipboard/contents/ui/clipboard.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/plasma/plasmoids/org.kde.plasma.clipboard/contents/ui/clipboard.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/plasma/plasmoids/org.kde.plasma.clipboard/contents/ui/clipboard.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
<Unknown File>: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
<Unknown File>: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
<Unknown File>: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
<Unknown File>: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
org.kde.plasma.pulseaudio: Attempting connection to PulseAudio sound daemon
org.kde.plasma.pulseaudio: QHash((266, "Name")(269, "Ports")(268, "CardIndex")(270, "ActivePortIndex")(257, "Index")(259, "ObjectName")(258, "PulseObject")(261, "Properties")(260, "Index")(263, "Muted")(262, "Volume")(265, "VolumeWritable")(264, "HasVolume")(267, "Description"))
org.kde.plasma.pulseaudio: QHash((266, "Name")(269, "Ports")(268, "CardIndex")(270, "ActivePortIndex")(257, "Index")(259, "ObjectName")(258, "PulseObject")(261, "Properties")(260, "Index")(263, "Muted")(262, "Volume")(265, "VolumeWritable")(264, "HasVolume")(267, "Description"))
file:///usr/lib/qt5/qml/org/kde/plasma/extras/ScrollArea.qml:48: Error: Cannot assign to non-existent property "interactive"
libkcups: 0
libkcups: 0
ST : DBus service "org.kde.Solid.PowerManagement" appeared. Loading "org.kde.plasma.battery"
org.kde.plasma: unversioned plugin detected, may result in instability
file:///usr/share/plasma/plasmoids/org.kde.plasma.volume/contents/ui/main.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/plasma/plasmoids/org.kde.plasma.volume/contents/ui/main.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/plasma/plasmoids/org.kde.plasma.volume/contents/ui/main.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/plasma/plasmoids/org.kde.plasma.volume/contents/ui/main.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
<Unknown File>: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
<Unknown File>: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
<Unknown File>: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
<Unknown File>: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
Both point size and pixel size set. Using pixel size.
file:///usr/share/plasma/plasmoids/org.kde.plasma.battery/contents/ui/batterymonitor.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/plasma/plasmoids/org.kde.plasma.battery/contents/ui/batterymonitor.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/plasma/plasmoids/org.kde.plasma.battery/contents/ui/batterymonitor.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/plasma/plasmoids/org.kde.plasma.battery/contents/ui/batterymonitor.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
ST : DBus service "org.freedesktop.Telepathy.MissionControl5" appeared. Loading "org.kde.ktp-contactlist"
org.kde.plasma: unversioned plugin detected, may result in instability
<Unknown File>: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
<Unknown File>: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
<Unknown File>: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
<Unknown File>: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
Both point size and pixel size set. Using pixel size.
Both point size and pixel size set. Using pixel size.
file:///usr/share/plasma/plasmoids/org.kde.ktp-contactlist/contents/ui/main.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/plasma/plasmoids/org.kde.ktp-contactlist/contents/ui/main.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/plasma/plasmoids/org.kde.ktp-contactlist/contents/ui/main.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/plasma/plasmoids/org.kde.ktp-contactlist/contents/ui/main.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/plasma/plasmoids/org.kde.ktp-contactlist/contents/ui/main.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/plasma/plasmoids/org.kde.ktp-contactlist/contents/ui/main.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/plasma/plasmoids/org.kde.ktp-contactlist/contents/ui/main.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/plasma/plasmoids/org.kde.ktp-contactlist/contents/ui/main.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/plasma/plasmoids/org.kde.ktp-contactlist/contents/ui/main.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/plasma/plasmoids/org.kde.ktp-contactlist/contents/ui/main.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/plasma/plasmoids/org.kde.ktp-contactlist/contents/ui/main.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/plasma/plasmoids/org.kde.ktp-contactlist/contents/ui/main.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
ST : DBus service "org.bluez" appeared. Loading "org.kde.plasma.bluetooth"
org.kde.plasma: unversioned plugin detected, may result in instability
file:///usr/share/plasma/plasmoids/org.kde.ktp-contactlist/contents/ui/main.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/plasma/plasmoids/org.kde.ktp-contactlist/contents/ui/main.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/plasma/plasmoids/org.kde.ktp-contactlist/contents/ui/main.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/plasma/plasmoids/org.kde.ktp-contactlist/contents/ui/main.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/plasma/plasmoids/org.kde.ktp-contactlist/contents/ui/main.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/plasma/plasmoids/org.kde.ktp-contactlist/contents/ui/main.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/plasma/plasmoids/org.kde.ktp-contactlist/contents/ui/main.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/plasma/plasmoids/org.kde.ktp-contactlist/contents/ui/main.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/plasma/plasmoids/org.kde.ktp-contactlist/contents/ui/main.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/plasma/plasmoids/org.kde.ktp-contactlist/contents/ui/main.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/plasma/plasmoids/org.kde.ktp-contactlist/contents/ui/main.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/plasma/plasmoids/org.kde.ktp-contactlist/contents/ui/main.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
<Unknown File>: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
<Unknown File>: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
<Unknown File>: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
<Unknown File>: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/plasma/plasmoids/org.kde.plasma.systemtray/contents/ui/TaskDelegate.qml:156: TypeError: Cannot read property 'taskItem' of undefined
file:///usr/share/plasma/plasmoids/org.kde.plasma.bluetooth/contents/ui/BluetoothApplet.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/plasma/plasmoids/org.kde.plasma.bluetooth/contents/ui/BluetoothApplet.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/plasma/plasmoids/org.kde.plasma.bluetooth/contents/ui/BluetoothApplet.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/plasma/plasmoids/org.kde.plasma.bluetooth/contents/ui/BluetoothApplet.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
ST : DBus service "org.freedesktop.NetworkManager" appeared. Loading "org.kde.plasma.networkmanagement"
org.kde.plasma: unversioned plugin detected, may result in instability
file:///usr/share/plasma/plasmoids/org.kde.plasma.bluetooth/contents/ui/BluetoothApplet.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/plasma/plasmoids/org.kde.plasma.bluetooth/contents/ui/BluetoothApplet.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/plasma/plasmoids/org.kde.plasma.bluetooth/contents/ui/BluetoothApplet.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/plasma/plasmoids/org.kde.plasma.bluetooth/contents/ui/BluetoothApplet.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/plasma/plasmoids/org.kde.plasma.bluetooth/contents/ui/BluetoothApplet.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/plasma/plasmoids/org.kde.plasma.bluetooth/contents/ui/BluetoothApplet.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/plasma/plasmoids/org.kde.plasma.bluetooth/contents/ui/BluetoothApplet.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/plasma/plasmoids/org.kde.plasma.bluetooth/contents/ui/BluetoothApplet.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/plasma/plasmoids/org.kde.plasma.bluetooth/contents/ui/BluetoothApplet.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/plasma/plasmoids/org.kde.plasma.bluetooth/contents/ui/BluetoothApplet.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/plasma/plasmoids/org.kde.plasma.bluetooth/contents/ui/BluetoothApplet.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/plasma/plasmoids/org.kde.plasma.bluetooth/contents/ui/BluetoothApplet.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
<Unknown File>: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
<Unknown File>: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
<Unknown File>: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
<Unknown File>: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/plasma/plasmoids/org.kde.plasma.networkmanagement/contents/ui/main.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/plasma/plasmoids/org.kde.plasma.networkmanagement/contents/ui/main.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/plasma/plasmoids/org.kde.plasma.networkmanagement/contents/ui/main.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/plasma/plasmoids/org.kde.plasma.networkmanagement/contents/ui/main.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
Plasma Shell startup completed
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.
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.
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.
Both point size and pixel size set. Using pixel size.
org.kde.plasma.pulseaudio: state callback
networkmanager-qt: void NetworkManager::NetworkManagerPrivate::propertiesChanged(const QVariantMap&) Unhandled property "Devices"
file:///usr/share/plasma/plasmoids/org.kde.plasma.networkmanagement/contents/ui/main.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/plasma/plasmoids/org.kde.plasma.networkmanagement/contents/ui/main.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/plasma/plasmoids/org.kde.plasma.networkmanagement/contents/ui/main.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/plasma/plasmoids/org.kde.plasma.networkmanagement/contents/ui/main.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/plasma/plasmoids/org.kde.plasma.networkmanagement/contents/ui/main.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/plasma/plasmoids/org.kde.plasma.networkmanagement/contents/ui/main.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/plasma/plasmoids/org.kde.plasma.networkmanagement/contents/ui/main.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/plasma/plasmoids/org.kde.plasma.networkmanagement/contents/ui/main.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/plasma/plasmoids/org.kde.plasma.networkmanagement/contents/ui/main.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/plasma/plasmoids/org.kde.plasma.networkmanagement/contents/ui/main.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/plasma/plasmoids/org.kde.plasma.networkmanagement/contents/ui/main.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/plasma/plasmoids/org.kde.plasma.networkmanagement/contents/ui/main.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/plasma/plasmoids/org.kde.plasma.networkmanagement/contents/ui/main.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/plasma/plasmoids/org.kde.plasma.networkmanagement/contents/ui/main.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/plasma/plasmoids/org.kde.plasma.networkmanagement/contents/ui/main.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/plasma/plasmoids/org.kde.plasma.networkmanagement/contents/ui/main.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/plasma/plasmoids/org.kde.plasma.networkmanagement/contents/ui/main.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/plasma/plasmoids/org.kde.plasma.networkmanagement/contents/ui/main.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/plasma/plasmoids/org.kde.plasma.networkmanagement/contents/ui/main.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/plasma/plasmoids/org.kde.plasma.networkmanagement/contents/ui/main.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
ktp-common-internals: Current presence changed
ktp-common-internals: Current presence changed
file:///usr/share/plasma/plasmoids/org.kde.plasma.networkmanagement/contents/ui/main.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/plasma/plasmoids/org.kde.plasma.networkmanagement/contents/ui/main.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/plasma/plasmoids/org.kde.plasma.networkmanagement/contents/ui/main.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
file:///usr/share/plasma/plasmoids/org.kde.plasma.networkmanagement/contents/ui/main.qml: QML Plasmoid: Cannot anchor to an item that isn't a parent or sibling.
org.kde.plasma.pulseaudio: state callback
org.kde.plasma.pulseaudio: state callback
org.kde.plasma.pulseaudio: ready
He deducido que se debe al cambio en una anteriror actualización, pero no pude identificar cuál fue. Tenía Kaos 2016.01 funcionando muy bien, la actualicé y ocurrió el error. (soy usuario de KaOS desde hace mucho y no había enfrentado este inconveniente antes)
No pude corregirlo así que Instalé KaOS 2016.03 solo para observar el mismo comportamiento..... Esperé hasta la actualización del 19 de marzo de 2016, (en donde se actualizó entre otros plasma-desktop y plasma-workspace) pero el error persiste.
Lo que congela plasmashell, en mi caso, es cualquier plasmoid tal como el lanzador de aplicaciones, el reloj, la bandeja del sistema. Casi todo. Algo tan simple como ver las propiedades del escritorio para cambiar el fondo (wallpaper) hace que plasmashell se congele.
Aclaro que no se congela inmediatamente. Ocurre progresivamente all interactuar con los elementos (plasmoids) del escritorio,
Actualmente uso KaOS de dos maneras: matando plasmashell (killall plasmashell en krunner o en yakuake) y lanzando toda aplicación con krunner, o bien, iniciando plasmashell con un panel muy básico, donde solo tengo el plasmoid del gestor de tareas de solo iconos....... ;-)