This error occurs when using any version of vncviewer on any platform and connecting to Debian 10 Buster.
The operating system is: Linux Debian 4.19.0-8-amd64 #1 SMP Debian 4.19.98-1 (2020-01-26) a86_64 GNU/Linux
The X11 Server is: xfce4
The contents of xprop -root are in the attached xprop-root_contents file.
The contents of xdpyinfo are in the attached xdpyinfo_contents file
The issue is that key mappings will only work from the command line of a terminal when vncviewer is attached to the host tightvnc server. However, if a recent version of qemu-system-x86_64 is started using UEFI, no keystrokes are passed on to the UEFI Shell or any menu choice. The guest just ignores any and all keyboard input.
I hope you can fix this issue as it limits the ability to use QEMU from the vncviewer. Thos problem does not happen when running qemu from the host terminal window.
Thank you,
Oliver Bailey
xprop-root_contents