Comment # 2 on bug 1184866 from 
"killall plasmashell" and "kstart5 plasmashell" got me the desktop back.

I attach the output in case there's something interesting there. I see a few
messages that definitely look like they shouldn't be there, though I doubt they
are related to the issue.


 kstart5 plasmashell
Omitting both --window and --windowclass arguments is not recommended
teo@lenovoteo:~> kf.plasma.quick: Applet preload policy set to 1
trying to show an empty dialog
file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/views/Desktop.qml:146:19:
QML Loader: Binding loop detected for property "height"
file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/views/Desktop.qml:146:19:
QML Loader: Binding loop detected for property "height"
qt.svg: <input>:406:376: Could not add child element to parent element because
the types are incorrect.
qt.svg: <input>:407:130: Could not add child element to parent element because
the types are incorrect.
qt.svg: <input>:408:130: Could not add child element to parent element because
the types are incorrect.
qt.svg: <input>:408:393: Could not add child element to parent element because
the types are incorrect.
qt.svg: <input>:409:130: Could not add child element to parent element because
the types are incorrect.
qt.svg: <input>:410:129: Could not add child element to parent element because
the types are incorrect.
qt.svg: <input>:411:129: Could not add child element to parent element because
the types are incorrect.
qt.svg: <input>:412:129: Could not add child element to parent element because
the types are incorrect.
qt.svg: <input>:413:129: Could not add child element to parent element because
the types are incorrect.
qt.svg: <input>:413:379: Could not add child element to parent element because
the types are incorrect.
qt.svg: <input>:413:631: Could not add child element to parent element because
the types are incorrect.
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.
file:///usr/share/plasma/plasmoids/org.kde.plasma.digitalclock/contents/ui/DigitalClock.qml:534:9:
QML Label: Binding loop detected for property "height"
file:///usr/share/plasma/plasmoids/org.kde.plasma.digitalclock/contents/ui/DigitalClock.qml:493:13:
QML Label: Binding loop detected for property "height"
trying to show an empty dialog
file:///usr/share/plasma/plasmoids/org.kde.panel/contents/ui/main.qml:30:1: QML
DropArea (parent or ancestor of QQuickLayoutAttached): Binding loop detected
for property "minimumWidth"
file:///usr/share/plasma/plasmoids/org.kde.plasma.digitalclock/contents/ui/DigitalClock.qml:493:13:
QML Label: Binding loop detected for property "height"
file:///usr/share/plasma/plasmoids/org.kde.plasma.digitalclock/contents/ui/DigitalClock.qml:534:9:
QML Label: Binding loop detected for property "height"
file:///usr/share/plasma/plasmoids/org.kde.plasma.digitalclock/contents/ui/DigitalClock.qml:554:5:
QML Label: Binding loop detected for property "height"
trying to show an empty dialog
plasma-pk-updates: Is net online: false
plasma-pk-updates: Is net mobile: false
plasma-pk-updates: Is net online: false
plasma-pk-updates: Is on battery: true
libkcups: CUPS-Get-Printers last error: 0 successful-ok
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
Cyclic dependency detected between
"file:///usr/share/plasma/plasmoids/org.kde.plasma.notifications/contents/ui/global/Globals.qml"
and
"file:///usr/share/plasma/plasmoids/org.kde.plasma.notifications/contents/ui/NotificationHeader.qml"
libkcups: 3 "canon"
libkcups: 0
libkcups: 0
plasma-pk-updates: Is net mobile: false
plasma-pk-updates: Is net online: true
plasma-pk-updates: Is net online: true
plasma-pk-updates: Daemon changed
trying to show an empty dialog
file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/views/Desktop.qml:146:19:
QML Loader: Binding loop detected for property "height"
file:///usr/share/plasma/shells/org.kde.plasma.desktop/contents/views/Desktop.qml:146:19:
QML Loader: Binding loop detected for property "height"
plasma-pk-updates: Is net mobile: false
plasma-pk-updates: Is net online: true
plasma-pk-updates: Is net online: true
plasma-pk-updates: Daemon changed
plasma-pk-updates: acPlugged initial state true
plasma-pk-updates: Is on battery: false
teo@lenovoteo:~> trying to show an empty dialog
file:///usr/share/plasma/plasmoids/org.kde.plasma.kickoff/contents/ui/LeaveButtons.qml:69:5:
QML ToolButton: Binding loop detected for property "display"
plasma-pk-updates: Is net online: true
plasma-pk-updates: Is net online: true
plasma-pk-updates: Is net online: true
plasma-pk-updates: Is net online: true
file:///usr/share/plasma/plasmoids/org.kde.plasma.pkupdates/contents/ui/Full.qml:223:13:
QML CheckBox: Detected anchors on an item that is managed by a layout. This is
undefined behavior; use Layout.alignment instead.
file:///usr/share/plasma/plasmoids/org.kde.plasma.pkupdates/contents/ui/Full.qml:233:13:
QML Label: Detected anchors on an item that is managed by a layout. This is
undefined behavior; use Layout.alignment instead.
file:///usr/share/plasma/plasmoids/org.kde.plasma.pkupdates/contents/ui/Full.qml:244:13:
QML MouseArea: Detected anchors on an item that is managed by a layout. This is
undefined behavior; use Layout.alignment instead.
file:///usr/share/plasma/plasmoids/org.kde.plasma.pkupdates/contents/ui/Full.qml:264:9:
QML Button: Detected anchors on an item that is managed by a layout. This is
undefined behavior; use Layout.alignment instead.
file:///usr/share/plasma/plasmoids/org.kde.plasma.pkupdates/contents/ui/Full.qml:278:9:
QML Button: Detected anchors on an item that is managed by a layout. This is
undefined behavior; use Layout.alignment instead.
file:///usr/share/plasma/plasmoids/org.kde.plasma.pkupdates/contents/ui/Full.qml:292:9:
QML BusyIndicator: Detected anchors on an item that is managed by a layout.
This is undefined behavior; use Layout.alignment instead.
qml: Populating model
file:///usr/share/plasma/plasmoids/org.kde.plasma.pkupdates/contents/ui/Full.qml:264:9:
QML Button: Detected anchors on an item that is managed by a layout. This is
undefined behavior; use Layout.alignment instead.
file:///usr/share/plasma/plasmoids/org.kde.plasma.pkupdates/contents/ui/Full.qml:278:9:
QML Button: Detected anchors on an item that is managed by a layout. This is
undefined behavior; use Layout.alignment instead.
file:///usr/share/plasma/plasmoids/org.kde.plasma.pkupdates/contents/ui/Full.qml:292:9:
QML BusyIndicator: Detected anchors on an item that is managed by a layout.
This is undefined behavior; use Layout.alignment instead.
trying to show an empty dialog

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