@elextr See João Alves: I think gtk <-> wayland interactions need some more care.
@Matthew Brush Command line `XMODIFIERS="@im=none" geany` produces `Gdk-Message: ... : Window ... is a temporary window without parent, application will not be able to position it on screen.` dead keys still lost.
@João Alves Command line `GDK_BACKEND=x11 geany` runs geany fine (no dead key lost).
Thanks so much: I love Geany for so long...