maintainer-feedback requested: [Bug 295653] x11/plasma6-plasma-workspace: can't start Wayland session after Qt libraries update to version 6.11.1

Bugzilla Automation <[email protected]> has asked freebsd-kde (group)
<[email protected]> for maintainer-feedback:
Bug 295653: x11/plasma6-plasma-workspace: can't start Wayland session after Qt
libraries update to version 6.11.1
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=295653



--- Description ---
Overview:
x11/plasma6-plasma-workspace can't start a Wayland session after the last Qt
libraries update (6.11.1) neither from sddm nor from console.

Steps to Reproduce:
Just try to login into a Plasma Wayland session with sddm or from tty.

Actual Results:
Trying to login from sddm results in a black screen with a cursor in the upper
left angle of the screen, just to return to the sddm greeter after a few
seconds.

Expected Results:
The Wayland session should start.

Additional Information:
- Both the original reporter on the FreeBSD forums (elgrande) and me have an
Intel GPU, but we don't know if the problem is related to this or not.

- The attempt to login to a Wayland session generates the following entry in
dmesg.today (repeated various times):

dmesg.today:pid 82939 (kwin_wayland), jid 0, uid 1001: exited on signal 11 (no
core dump - denied by kern.coredump).

- Trying to launch the Wayland session from tty with
    $ /usr/local/bin/ck-launch-session
/usr/local/lib/libexec/plasma-dbus-run-session-if-needed
/usr/local/bin/startplasma-wayland
gives the output in the file attached (too long to post directly).

That said, the X11 session still works, but programs like systemmonitor,
systemsettings and windows for configuring Plasma widgets are themed
incorrectly; this happens with my FreeBSD VM that uses the scfb driver (hence
the doubt that the bug is strictly related to Intel GPUs). 

For the relative discussion on the FreeBSD forums and screenshots please refer
to posts from
https://forums.freebsd.org/threads/trying-to-run-kde-6-plasma-with-wayland.9395
1/post-761317
forward.

Thank you in advance.