SUMMARY *** On plasma v6 RC2 GTK-themed windows such as thunderbird have a shadow with the default breeze theme. This shadow area is mostly transparent, but quite large. If you try to right click the desktop behind the shadow the mouse click does not register with the desktop and the desktop context menu does not appear. *** STEPS TO REPRODUCE 1. Open thunderbird in windowed mode 2. Notice shadow around the window 3. try to right click outside the thunderbird window, but in the area of the shadow OBSERVED RESULT desktop context menu does not open EXPECTED RESULT desktop context menu should open SOFTWARE/OS VERSIONS Windows: macOS: Linux/KDE Plasma: 5.93 (available in About System) KDE Plasma Version: 5.93 KDE Frameworks Version: Qt Version: ADDITIONAL INFORMATION
Is thunderbird running in xwayland? A quick test is to run xprop and hover over thunderbird. If it goes into a + cursor, it's xwayland
I've done the xprop test and it shows a crosshair cursor, so it's running in xwayland.
Thank you! The issue has been resolved. I've followed tutorial https://gnulinux.ch/mozilla-firefox-im-wayland-modus-nutzen to force thunderbird to use native wayland implementation with this command: sudo echo "MOZ_ENABLE_WAYLAND=1" >> /etc/environment The logout and log in to plasma wayland again, and now the shadow area is right-clickable and shows desktop content menu. From my side the issue is resolved, if you want to keep this as xwayland issue then you can reopen it.
We have the same problem exhibiting with xwaylandvideobridge kwin thinks xwayland should get the mouse, x doesn't have a window there that wants input. We can keep this resolved, I'm sure we have a billion bug reports on that, but it's interesting to know it affects other things