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--- doc:appunti:linux:sa:touchpad_disable [2021/05/12 10:17] – niccolo
+++ doc:appunti:linux:sa:touchpad_disable [2021/05/13 09:42] (current) – [Mapping Fn+ESC on the Teclast F6] niccolo
@@ Line 42: / Line 42: @@
 Replace the **zero** with **1** to re-enable it.
+===== Mapping Fn+ESC on the Teclast F6 =====
+The ESC key on the **Teclast F6 notebook** has the blue label indicating that the shortcut **Fn+ESC** should trigger the **touchpad toggle** function, but it does not work in GNU/Linux.
+Using the **evtest** tool we can see that the Fn+ESC keys produces three events, i.e. it is the same as pressing three keys together:
+<code>
+Event: time 1620808296.082667, -------------- SYN_REPORT ------------
+Event: time 1620808298.469045, type 4 (EV_MSC), code 4 (MSC_SCAN), value 1d
+Event: time 1620808298.469045, type 1 (EV_KEY), code 29 (KEY_LEFTCTRL), value 1
+Event: time 1620808298.469045, -------------- SYN_REPORT ------------
+Event: time 1620808298.471997, type 4 (EV_MSC), code 4 (MSC_SCAN), value db
+Event: time 1620808298.471997, type 1 (EV_KEY), code 125 (KEY_LEFTMETA), value 1
+Event: time 1620808298.471997, -------------- SYN_REPORT ------------
+Event: time 1620808298.473572, type 4 (EV_MSC), code 4 (MSC_SCAN), value 76
+Event: time 1620808298.473572, type 1 (EV_KEY), code 85 (KEY_ZENKAKUHANKAKU), value 1
+</code>
+The keys are **Left Control**, **Left Meta** (also known as //Left Windows Logo// key) and the key used to toggle from Zenkaku (full-width) to Hankaku (half-width) Japanese character spacing :-O
+Using **udev** I remapped the ''ZENKAKUHANKAKU'' key to the more useable **ESC** (see this page about **[[remap_keyboard_keys#customize_events_using_udev|customize udev events]]**):
+<file>
+evdev:atkbd:dmi:*
+ KEYBOARD_KEY_76=esc
+</file>
+If you are interested, I have a more complete configuration file which I use also to swap the **Fn key** behaviour on function keys (I want them to work as first option, instead of multimedia buttons). See this page about **[[remap_keyboard_keys#configuration_example_for_the_teclast_f6_notebook|rempapping keyboard keys]]**.
+Finally, using the XFCE **Settings** => **Keyboard**, I associated the **Ctrl+Super+Escape** keyboard shortcut (where //Super// means //Left Windows Logo//) to the following shell script **/usr/local/bin/touchpad-toggle**:
+<code bash>
+#!/bin/sh
+STATE="$(xinput --list-props 11 | egrep '^\s+Device Enabled' | rev | awk '{print $1}')"
+set_on() {
+    xinput set-prop 11 154 1
+    echo "Touchpad enabled"
+}
+set_off() {
+    xinput set-prop 11 154 0
+    echo "Touchpad disabled (pass \"1\" as first option to re-enable it)"
+}
+case "$1" in
+    on|yes|1)
+        set_on
+        ;;
+    off|no|0)
+        set_off
+        ;;
+    *)
+        if [ "$STATE" -eq "1" ]; then
+            set_off
+        else
+            set_on
+        fi
+        ;;
+esac
+</code>
+**NOTICE**: I usually use the **Left Windows Logo** key as the **compose key**, to type international characters. Unfortunately the compose key cannot be used into an XFCE keyboard shortcut, so I changed my compose key to the **Menu key** (the one at the right of the space).
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