Update the PinePhone keyboard driver to support missing characters?

[SwordfishII]

The goal is to run LibreOffice in Posh on the PinePhone. It can be run by typing:

OOO_FORCE_DESKTOP=gnome-wayland libreoffice

into to terminal. The GUI cannot be started, the LibreOffice installation prevents the start.

I have the PinePhone keyboard connected to the PinePhone, which works also for the terminal. I tried to type:

OOO_FORCE_DESKTOP=gnome-wayland libreoffice

Unfortunately, I cannot print a «_» with the PinePhone keyboard. The characters are on the PinePhone keyboard, but neither control, Fn, Alt, AltG nor the special Pine key works to get the characters to be printed in the terminal.

How can I modify the PinePhone keyboard driver to support the missing characters?

Look at threads in your OS specific forum regarding the keyboard userland driver. Many have step by step instructions