"Positioning" does not work under pure Wayland

[mkurz]

After making things work on Linux aarch64 (#168) I can not run PDF-Over correctly in a KDE Wayland session.

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When forcing Xwayland it works:

GDK_BACKEND=x11 java -cp './pdf-over-build/lib/*' at.asit.pdfover.gui.Main "$@"

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However trying pure Wayland mode does not work:

GDK_BACKEND=wayland java -cp './pdf-over-build/lib/*' at.asit.pdfover.gui.Main "$@"

I did read your comment so it seems you are aware of that and set GDK_BACKEND to force Xwayland for now:

PDF-Over/pdf-over-gui/src/main/resources/scripts/pdf-over_linux.sh

Line 3 in 0bc72fb

GDK_BACKEND=x11,wayland exec $BASEDIR/jre/bin/java -cp "$BASEDIR/lib/*" at.asit.pdfover.gui.Main "$@"

But I would be interested

• did you find out already what the exact problem is? Is it in your code? Or is it that a third party dependency you are using that takes care of that preview and positioning is broken?

Also, can we keep this issue open just to keep track of Wayland support?

Thanks!

[mkurz]

Also, since Gnome already dropped the X11 backend, and KDE will do so as well in 2027 I hope this gets fixed. I know for many years we can still just force Xwayland, however even GTK will drop the x11 backend with gtk5, so the GDK_BACKEND=x11 workaround will stop working someday (still many years away however).