My XKB config

My keyboard layout is basically Colemak with Mod-DHk, keeping most of the local Finnish symbols from the fi keymap in place.

I've moved many AltGr bindings to a more comfortable location, and added an "extend" layer (inspired by DreymaR's Big Bag of Keyboard Tricks), which is activated by pressing Caps Lock, left Alt, or both, and has e.g. arrows, Backspace, Delete and many Emacs specific keys. Caps Lock (locked) and Super (latched) have been moved to better locations as well.

This is the base layout. By pressing AltGr, you get the symbols in the lower right.

┌─────┐
│Caps │
│ Lock│
└─────┘
┌─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┲━━━━━━━━━┓
│ ~   │ !   │ "   │ #   │ $   │ %   │ &   │ /   │ (   │ )   │ =   │ ?   │ Å   ┃         ┃
│ `   │ 1   │ 2 @ │ 3 £ │ 4 € │ 5   | 6   │ 7   │ 8   │ 9   │ 0   │ + \ │ å   ┃    ⌫    ┃
┢━━━━━┷━┱───┴─┬───┴─┬───┴─┬───┴─┬───┴─┬───┴─┬───┴─┬───┴─┬───┴─┬───┴─┬───┴─┬───┺━┳━━━━━━━┫
┃       ┃ Q   │ W   │ F   │ P   │ B   │ J   │ L   │ U   │ Y   │ Ö   │     │ ^   ┃       ┃
┃ Tab   ┃ q < │ w > │ f = │ p   │ b   │ j   │ l   │ u [ │ y ] │ ö   │ Esc │ ^   ┃ Enter ┃
┣━━━━━━━┻┱────┴┬────┴┬────┴┬────┴┬────┴┬────┴┬────┴┬────┴┬────┴┬────┴┬────┴┬────┺┓      ┃
┃        ┃ A   │ R   │ S   │ T   │ G   │ K   │ N   │ E   │ I   │ O   │ Ä   │ *   ┃      ┃
┃ Ctrl   ┃ a _ │ r - │ s / │ t ? │ g   │ k   │ n { │ e ( │ i ) │ o } │ ä   │ '   ┃      ┃
┣━━━━━━┳━┹───┬─┴───┬─┴───┬─┴───┬─┴───┬─┴───┬─┴───┬─┴───┬─┴───┬─┴───┬─┴───┲━┷━━━━━┻━━━━━━┫
┃      ┃ Z   │ X   │ C   │ D   │ V   │     | M   │ H   │ ;   │ :   │ _   ┃              ┃
┃Shift ┃ z | │ x   │ c : │ d ; │ v   │Super│ m   │ h   │ ,   │ .   │ -   ┃     Shift    ┃
┣━━━━━━┻┳━━━━┷━━┳━━┷━━━━┱┴─────┴─────┴─────┴─────┴─────┴────┲┷━━━━━┷┳━━━━┻━━┳━━━━━━━┳━━━┛
┃       ┃       ┃       ┃                                   ┃       ┃       ┃       ┃
┃ Ctrl  ┃ Alt   ┃  Alt  ┃                Space              ┃ AltGr ┃       ┃ Ctrl  ┃
┗━━━━━━━┻━━━━━━━┻━━━━━━━┹───────────────────────────────────┺━━━━━━━┻━━━━━━━┻━━━━━━━┛

Caps Lock acts mostly as Control, except for the following keys which have a different meaning when Caps Lock is pressed. You can still press left Control to get their original control key:

┌─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┲━━━━━━━━━┓
│     │     │     │     │     │     │     │     │     │     │     │     │     ┃         ┃
│     │     │     │     │     │     │     │     │     │     │     │     │     ┃    ⌫    ┃
┢━━━━━┷━┱───┴─┬───┴─┬───┴─┬───┴─┬───┴─┬───┴─┬───┴─┬───┴─┬───┴─┬───┴─┬───┴─┬───┺━┳━━━━━━━┫
┃       ┃     │     │     │     │     │     │     │     │     │     │     │     ┃       ┃
┃ Tab   ┃     │     │     │     │     │     │  ⌫  │  ↑  │  ⌦  │     │ Esc │     ┃ Enter ┃
┣━━━━━━━┻┱────┴┬────┴┬────┴┬────┴┬────┴┬────┴┬────┴┬────┴┬────┴┬────┴┬────┴┬────┺┓      ┃
┃Pressed!┃     │     │     │     │     │     │     │     │     │     │     │     ┃      ┃
┃ Ctrl!  ┃     │     │     │     │     │ C-x │  ←  │  ↓  │  →  │     │     │     ┃      ┃
┣━━━━━━┳━┹───┬─┴───┬─┴───┬─┴───┬─┴───┬─┴───┬─┴───┬─┴───┬─┴───┬─┴───┬─┴───┲━┷━━━━━┻━━━━━━┫
┃      ┃     │     │     │     │     │     │Shift│     │     │     │     ┃              ┃
┃Shift ┃     │     │     │     │     │Super│ Ins │     │     │     │     ┃     Shift    ┃
┣━━━━━━┻┳━━━━┷━━┳━━┷━━━━┱┴─────┴─────┴─────┴─────┴─────┴────┲┷━━━━━┷┳━━━━┻━━┳━━━━━━━┳━━━┛
┃       ┃       ┃       ┃                                   ┃       ┃       ┃       ┃
┃ Ctrl  ┃ Alt   ┃  Alt  ┃                Space              ┃ AltGr ┃       ┃ Ctrl  ┃
┗━━━━━━━┻━━━━━━━┻━━━━━━━┹───────────────────────────────────┺━━━━━━━┻━━━━━━━┻━━━━━━━┛

Left Alt acts mostly as Alt (Meta1), except for the following keys. The left Win key acts as an unmodified Alt (Meta1).

┌─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┲━━━━━━━━━┓
│     │     │     │     │     │     │     │     │     │     │     │     │     ┃         ┃
│     │     │     │     │     │     │     │     │     │     │     │     │     ┃    ⌫    ┃
┢━━━━━┷━┱───┴─┬───┴─┬───┴─┬───┴─┬───┴─┬───┴─┬───┴─┬───┴─┬───┴─┬───┴─┬───┴─┬───┺━┳━━━━━━━┫
┃       ┃     │     │     │     │     │     │     │     │     │     │     │     ┃       ┃
┃ Tab   ┃     │     │     │     │     │     │ C-⌫ │     │ C-⌦ │     │ Esc │     ┃ Enter ┃
┣━━━━━━━┻┱────┴┬────┴┬────┴┬────┴┬────┴┬────┴┬────┴┬────┴┬────┴┬────┴┬────┴┬────┺┓      ┃
┃        ┃     │     │     │     │     │     │     │     │     │     │     │     ┃      ┃
┃ Ctrl   ┃     │     │     │     │     │     │ C-← │     │ C-→ │     │     │     ┃      ┃
┣━━━━━━┳━┹───┬─┴───┬─┴───┬─┴───┬─┴───┬─┴───┬─┴───┬─┴───┬─┴───┬─┴───┬─┴───┲━┷━━━━━┻━━━━━━┫
┃      ┃     │     │     │     │     │     │     │     │     │     │     ┃              ┃
┃Shift ┃     │     │     │     │     │Super│ M-y │     │     │     │     ┃     Shift    ┃
┣━━━━━━┻┳━━━━┷━━┳━━┷━━━━┱┴─────┴─────┴─────┴─────┴─────┴────┲┷━━━━━┷┳━━━━┻━━┳━━━━━━━┳━━━┛
┃       ┃       ┃Pressed┃                                   ┃       ┃       ┃       ┃
┃ Ctrl  ┃ Alt   ┃  Alt! ┃                Space              ┃ AltGr ┃       ┃ Ctrl  ┃
┗━━━━━━━┻━━━━━━━┻━━━━━━━┹───────────────────────────────────┺━━━━━━━┻━━━━━━━┻━━━━━━━┛

When both Caps Lock and Left Alt are pressed:

┌─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┬─────┲━━━━━━━━━┓
│     │     │     │     │     │     │     │     │     │     │     │     │     ┃         ┃
│     │     │     │     │     │     │     │     │     │     │     │     │     ┃    ⌫    ┃
┢━━━━━┷━┱───┴─┬───┴─┬───┴─┬───┴─┬───┴─┬───┴─┬───┴─┬───┴─┬───┴─┬───┴─┬───┴─┬───┺━┳━━━━━━━┫
┃       ┃     │     │     │     │     │     │     │     │     │     │     │     ┃       ┃
┃ Tab   ┃     │     │     │     │     │     │     │ PgUp│ C-k │     │ Esc │     ┃ Enter ┃
┣━━━━━━━┻┱────┴┬────┴┬────┴┬────┴┬────┴┬────┴┬────┴┬────┴┬────┴┬────┴┬────┴┬────┺┓      ┃
┃Pressed ┃     │     │     │     │     │     │     │     │     │     │     │     ┃      ┃
┃ Ctrl!  ┃     │     │     │     │     │     │ Home│ PgDn│ End │     │     │     ┃      ┃
┣━━━━━━┳━┹───┬─┴───┬─┴───┬─┴───┬─┴───┬─┴───┬─┴───┬─┴───┬─┴───┬─┴───┬─┴───┲━┷━━━━━┻━━━━━━┫
┃      ┃     │     │     │     │     │     │     │     │     │     │     ┃              ┃
┃Shift ┃     │     │     │     │     │Super│     │     │     │     │     ┃     Shift    ┃
┣━━━━━━┻┳━━━━┷━━┳━━┷━━━━┱┴─────┴─────┴─────┴─────┴─────┴────┲┷━━━━━┷┳━━━━┻━━┳━━━━━━━┳━━━┛
┃       ┃       ┃Pressed┃                                   ┃       ┃       ┃       ┃
┃ Ctrl  ┃ Meta  ┃  Alt! ┃                Space              ┃ AltGr ┃ Super ┃ Ctrl  ┃
┗━━━━━━━┻━━━━━━━┻━━━━━━━┹───────────────────────────────────┺━━━━━━━┻━━━━━━━┻━━━━━━━┛

Usage

Copy the file akheron to /usr/share/X11/xkb/symbols.

Activate the layout: setxkbmap -rules evdev -model pc105 -layout akheron -variant '' -option ''

To make the changes persistent, add the following to /etc/X11/xorg.conf, or /etc/X11/xorg.conf.d/00-keyboard.conf

Section "InputClass"
    Identifier "akheron"
    MatchIsKeyboard "on"
    Option  "XkbRules"         "evdev"
    Option  "XkbModel"         "pc105"
    Option  "XkbLayout"        "akheron"
    Option  "XkbVariant"       ""
    Option  "XkbOptions"       ""
EndSection

Known issues

For some reason, key repeat stops working if the keymap is made persistent as described above. It can be fixed by running the following shell script after X has started, e.g. in ~/.xinitrc:

for keycode in $(seq 8 255); do
    xset r $keycode
done