Configuring Ubuntu 22.04.2 LTS (Jammy) I noticed the old way of setting the layout with xkbcomp (check the amalbuquerque/dotfiles/lxlayout.sh) doesn't work with GNOME on Wayland.

To get the custom layout in place we should:

• Use the GNOME settings to select the "English (intl., with AltGr dead keys)" as the only keyboard layout

• Use the create_xkb_customization.sh script to create the ~/.config/xkb folder structure and symlink the symbols/xkb-customization-for-accents

• Log off and login again to ensure the GNOME settings "see" the customization

• Use the GNOME settings to select the "custom" layout

  • You need to pick "Other" and inside it, select "A user-defined custom layout" (check the pictures below)

  

• Select the custom layout

  

Example of customizing the "tilde" key (TLDE):

    key <TLDE> { [    dead_grave, dead_tilde,      grave,       asciitilde       ] };

• Check the file /usr/share/X11/xkb/keycodes/evdev for the values on the left between <...>
• Check the file /usr/include/X11/keysymdef.h for the values on the right-side (e.g. dead_grave)

To install and use the keymap every time, clone this repo and then run the load_xkb_keymap_on_xinitrc.sh script.

It will add a line to the ~/.xinitrc file that will load the current keymap with xkbcomp.

• xcape wasn't working that well (while writing fast, space would activate the Fn-layer instead of just sending Space);
• Tried a spacefn.cpp program from Pro XKB, a fellow Geekhack user sent me after reading his inputs about the topic, and it worked flawlessly! It needed a layout with Level 5, therefore I exported the German Neo layout (https://neo-layout.org/index_en.html) that had the needed Level 5 and started plugging my own layout on top of it (ANSI-US with some tweaks for having common portuguese accents+characters and also my long-wished-for SpaceFn).
• To compile spacefn.cpp, use the Dockerfile to run a container with the needed dependencies and follow the comments on the source file.
• Then to use it:
  1. Apply the neo_lx layout (adjust the paths): xkbcomp -I$HOME/projs/personal/xkb_spike ~/projs/personal/xkb_spike/neo_map :0
  2. Run the spacefn after mapping space to the unused keycode: xmodmap -e "keycode 202 = space" -e "keycode 65 =" ; ~/projs/personal/spacefn_xkb/spacefn &

my.xkb is the full "dumped" xkb configuration with:

• xkbcomp :0 my.xkb (:0 is the X $DISPLAY)

To apply it (after changing it):

• xkbcomp my.xkb :0

This is ugly since we have the whole dump of the configuration. Read here (https://a3nm.net/blog/xkbcomp.html) that we can just have the changes we made to a specific and existing layout.

First created the my_map with:

• setxkbmap -layout us -variant altgr-intl -model pc104 -option caps:ctrl_modifier -print > my_map

Then created the symbols folder and the accents config file (it can have any name) and added my changes to it (to have immediate backtick, tilde and circumflex on AltGr+T|G|B, respectively).

Finally, added the +accents(accents) to the xkb_symbols entry on the my_map file.

To apply it use:

• xkbcomp -I$HOME/xkb_spike ~/xkb_spike/my_map :0 (:0 is the X $DISPLAY)

To reset the keyboard layout:

• setxkbmap -layout us -variant altgr-intl -model pc104 -option caps:ctrl_modifier

• From where I took the approach of only customizing a subset of stuff: https://a3nm.net/blog/xkbcomp.html
• Unix Stackexchange question about how to assign a new shift level to Fn1-12, placed me in the right HYPER direction: https://unix.stackexchange.com/questions/155797/xkb-assign-a-new-shift-level-to-function-keys
• Cool Medium article: https://medium.com/@damko/a-simple-humble-but-comprehensive-guide-to-xkb-for-linux-6f1ad5e13450
• How to create a custom selectable layout blog post: http://rlog.rgtti.com/2014/05/01/how-to-modify-a-keyboard-layout-in-linux/
• An article that goes to great detail to explain how xkb works: https://www.charvolant.org/doug/xkb/html/node5.html
• Arch linux comprehensive documentation on xkb: https://wiki.archlinux.org/index.php/X_KeyBoard_extension

Running xcape with the following allows me to use Space as Hyper (if the Space physical key is sending the Hyper):

• xcape -f -t 140 -e 'Hyper_R=space;Shift_L=Escape;Shift_R=Delete'
• After trial and error, 140 feels like the appropriate timeout

1. Apparently, some of the SpaceFN mappings don't work inside Alacritty :(
   • arrows, home, end don't work
   • backspace, delete work
2. XF86Audio* keycodes are sent but don't do a thing