A program which works correctly on X is crippled on Wayland, one of the
panels is not opened. I was advised to use xcb, but it does not have any
effect.

More information at the thread:

https://forum.qt.io/topic/154144/debian-after-upgrading-the-system-the-program-became-unusable-how-to-approach-the-problem/13?_=1706499698799

BTW, when reporting this problem with Emacs debian-bug I got a strange
warning that libqt6gui6 is not installed although apt install reports
"libqt6gui6 is already the newest version (6.4.2+dfsg-10)." Quite
possible that my QT installation is somehow messed up (I use it only for
compiling two QT programs). qtchooser reports 7 versions: 4 5 default
qt4-x86_64-linux-gnu qt4 qt5-x86_64-linux-gnu qt5. QTCreator reports
5.15.8 twice: /usr/lib/qt5/bin/qmake and
/usr/lib/x86_64-linux-gnu/qt5/bin/qmake.

I will appreciate your help

JSB

On Mon, Jan 29 2024 at  5:28 +01, Janusz S. Bień wrote:

[...]

After upgrading yesterday to Debian 11.9, the situation changed
slightly. The left panel still doesn't open but now QT_DEBUG_PLUGINS=1
produced some output (earlier there was none) which I enclose.

Best regards

JSB