Hi all,

I am facing an issue with multiple monitors due to kwin (or maybe plasmashell).

I would like to confirm if other users are facing the same issue, and if yes I would like to collect more information to properly file an issue on bugs.kde.org.

How to reproduce:
1) Set up a dual monitor scene.
2) Using kcm_kscreen, configure your screens with different resolutions. The idea is to have a height "gap" between them. For instance:



3) Open an application (any). Within screen 2, use the task manager bar to "click & hold & move" the application tab towards the gap area and release it there.

**4.1) All windows will be non-responsive (all mouse functionalities are over - although you can still use the application [.i.e write in the terminal] and select them using alt+tab).
**4.2) If you kill kwin and start it again, all windows will be visually broken (.i.e. title bar will disappear, close/minimize/maximize buttons will disappear, also the task manager bar will be vanished...) but you can click on them again.

5) To properly solve it, you need to either logout or reboot.

Note: Kwin & plasma do not output anything wrong when the windows became non-responsible. I recorded kwin's log after "kwin --replace":

Code: Select all

kf5.kcoreaddons.desktopparser: Could not locate service type file kservicetypes5/kwin-effect.desktop, tried ("/home/myuser/.local/share", "/usr/share/usr/share/xsessions/plasma", "/usr/local/share", "/usr/share", "/var/lib/snapd/desktop")
kf5.kcoreaddons.desktopparser: Could not locate service type file kservicetypes5/kwin-effect.desktop, tried ("/home/myuser/.local/share", "/usr/share/usr/share/xsessions/plasma", "/usr/local/share", "/usr/share", "/var/lib/snapd/desktop")
kf5.kcoreaddons.desktopparser: Could not locate service type file kservicetypes5/kwin-effect.desktop, tried ("/home/myuser/.local/share", "/usr/share/usr/share/xsessions/plasma", "/usr/local/share", "/usr/share", "/var/lib/snapd/desktop")
kf5.kcoreaddons.desktopparser: Could not locate service type file kservicetypes5/kwin-effect.desktop, tried ("/home/myuser/.local/share", "/usr/share/usr/share/xsessions/plasma", "/usr/local/share", "/usr/share", "/var/lib/snapd/desktop")
QXcbConnection: XCB error: 9 (BadDrawable), sequence: 2415, resource id: 0, major code: 14 (GetGeometry), minor code: 0
QXcbConnection: XCB error: 9 (BadDrawable), sequence: 2416, resource id: 0, major code: 14 (GetGeometry), minor code: 0
QXcbConnection: XCB error: 9 (BadDrawable), sequence: 2417, resource id: 0, major code: 14 (GetGeometry), minor code: 0
QXcbConnection: XCB error: 9 (BadDrawable), sequence: 2419, resource id: 0, major code: 14 (GetGeometry), minor code: 0
QXcbConnection: XCB error: 9 (BadDrawable), sequence: 2421, resource id: 0, major code: 14 (GetGeometry), minor code: 0
QXcbConnection: XCB error: 9 (BadDrawable), sequence: 2422, resource id: 0, major code: 14 (GetGeometry), minor code: 0
QXcbConnection: XCB error: 9 (BadDrawable), sequence: 2425, resource id: 0, major code: 14 (GetGeometry), minor code: 0
QXcbConnection: XCB error: 9 (BadDrawable), sequence: 2426, resource id: 0, major code: 14 (GetGeometry), minor code: 0
QXcbConnection: XCB error: 9 (BadDrawable), sequence: 2427, resource id: 0, major code: 14 (GetGeometry), minor code: 0
QXcbConnection: XCB error: 9 (BadDrawable), sequence: 2429, resource id: 0, major code: 14 (GetGeometry), minor code: 0
QXcbConnection: XCB error: 9 (BadDrawable), sequence: 2431, resource id: 0, major code: 14 (GetGeometry), minor code: 0
QXcbConnection: XCB error: 9 (BadDrawable), sequence: 2432, resource id: 0, major code: 14 (GetGeometry), minor code: 0
QXcbConnection: XCB error: 9 (BadDrawable), sequence: 2435, resource id: 0, major code: 14 (GetGeometry), minor code: 0
QXcbConnection: XCB error: 9 (BadDrawable), sequence: 2436, resource id: 0, major code: 14 (GetGeometry), minor code: 0
QXcbConnection: XCB error: 9 (BadDrawable), sequence: 2437, resource id: 0, major code: 14 (GetGeometry), minor code: 0
QXcbConnection: XCB error: 9 (BadDrawable), sequence: 2439, resource id: 0, major code: 14 (GetGeometry), minor code: 0
QXcbConnection: XCB error: 9 (BadDrawable), sequence: 2441, resource id: 0, major code: 14 (GetGeometry), minor code: 0
QXcbConnection: XCB error: 9 (BadDrawable), sequence: 2442, resource id: 0, major code: 14 (GetGeometry), minor code: 0
QXcbConnection: XCB error: 9 (BadDrawable), sequence: 2445, resource id: 0, major code: 14 (GetGeometry), minor code: 0
QXcbConnection: XCB error: 9 (BadDrawable), sequence: 2446, resource id: 0, major code: 14 (GetGeometry), minor code: 0
QXcbConnection: XCB error: 9 (BadDrawable), sequence: 2447, resource id: 0, major code: 14 (GetGeometry), minor code: 0
QXcbConnection: XCB error: 9 (BadDrawable), sequence: 2449, resource id: 0, major code: 14 (GetGeometry), minor code: 0
QXcbConnection: XCB error: 9 (BadDrawable), sequence: 2451, resource id: 0, major code: 14 (GetGeometry), minor code: 0
QXcbConnection: XCB error: 9 (BadDrawable), sequence: 2452, resource id: 0, major code: 14 (GetGeometry), minor code: 0
kf5.kcoreaddons.desktopparser: Could not locate service type file kservicetypes5/kwin-script.desktop, tried ("/home/myuser/.local/share", "/usr/share/usr/share/xsessions/plasma", "/usr/local/share", "/usr/share", "/var/lib/snapd/desktop")
kf5.kcoreaddons.desktopparser: Could not locate service type file kservicetypes5/kwin-script.desktop, tried ("/home/myuser/.local/share", "/usr/share/usr/share/xsessions/plasma", "/usr/local/share", "/usr/share", "/var/lib/snapd/desktop")
kf5.kcoreaddons.desktopparser: Could not locate service type file kservicetypes5/kwin-script.desktop, tried ("/home/myuser/.local/share", "/usr/share/usr/share/xsessions/plasma", "/usr/local/share", "/usr/share", "/var/lib/snapd/desktop")
kf5.kcoreaddons.desktopparser: Could not locate service type file kservicetypes5/kwin-script.desktop, tried ("/home/myuser/.local/share", "/usr/share/usr/share/xsessions/plasma", "/usr/local/share", "/usr/share", "/var/lib/snapd/desktop")                                                               
kf5.kcoreaddons.desktopparser: Could not locate service type file kservicetypes5/kwin-script.desktop, tried ("/home/myuser/.local/share", "/usr/share/usr/share/xsessions/plasma", "/usr/local/share", "/usr/share", "/var/lib/snapd/desktop")                                                               
file:///usr/share/plasma/look-and-feel/org.kde.breeze.desktop/contents/windowswitcher/WindowSwitcher.qml:44:19: QML ScrollView: Binding loop detected for property "height"
file:///usr/share/plasma/look-and-feel/org.kde.breeze.desktop/contents/windowswitcher/WindowSwitcher.qml:44:19: QML ScrollView: Binding loop detected for property "height"
^CCannot clear shadow from window without native surface!

I would love to check if someone else can confirm this bug. Also, I need to collect more useful logs to properly file it online.
[code]
Qt: 5.6.1
KDE Frameworks: 5.36.0
kf5-config: 1.0
plasmashell 5.8.7
[\code]

Hi all,

It seems this issue has been solved by disabling VirtualBox Drag'n'Drop option. For the last few days, my virtual machine is running without any crash.

I have been having the same problem for a number of weeks now as well. Very similar multi-head setup with 2560x1440 and 1920x1080. I don't have an issue with moving the windows, however I get a segmentation fault whenever I try to alt-tab with the same error message ie.
file:///usr/share/plasma/look-and-feel/org.kde.breeze.desktop/contents/windowswitcher/WindowSwitcher.qml:44:19: QML ScrollView: Binding loop detected for property "height" on a baremetal arch box so perhaps there is a bug somewhere