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--- doc:appunti:linux:sa:remap_keyboard_keys [2021/12/07 11:22] – [ACPI and evemu] niccolo
+++ doc:appunti:linux:sa:remap_keyboard_keys [2021/12/07 11:50] (current) – [xmodmap] niccolo
@@ Line 17: / Line 17: @@
 </code>
-It is possibile to customize the ACPI events to reassign the brightness keys to plain function keys, but it is not the preferred way (see [[#acpi_and_evemu|ACPI and evemu]]), because it requires to run an additional sofware layer (the acpid daemon) and the execution of slow action scripts.
+It is possibile to customize the ACPI events to reassign the brightness keys to plain function keys, but it is not the preferred way (see [[#acpi_and_evemu|ACPI and evemu]]), because it requires to run an additional sofware layer (the acpid daemon) and the execution of slow action scripts. The simplest method is to **[[#customize_events_using_udev_and_hwdb|customize input events using udev and hwdb]]**.
 It seems that the LCD (DISPLAYTOGGLE) multimedia function is intercepted by the hardware and it is not handled as an input event nor as an ACPI event by the operating system.
@@ Line 181: / Line 181: @@
 ===== Configuration example for the Teclast F6 notebook =====
-The following is the file **/etc/udev/hwdb.d/90-custom-keyboard.hwdb** which I use on my Teclast F6 notebook:
+The following is the file **/etc/udev/hwdb.d/90-teclast-f6-keyboard.hwdb** which I use on my Teclast F6 notebook:
 <file>
-# /etc/udev/hwdb.d/90-custom-keyboard.hwdb
+# /etc/udev/hwdb.d/90-teclast-f6-keyboard.hwdb
 #
 # Keyboard remapping for the Teclast F6 notebook.
-# 2021-05-13 Niccolo Rigacci <niccolo@rigacci.org>
+# 2021-12-07 Niccolo Rigacci <niccolo@rigacci.org>
 #
 # The following udev hwdb configuration swaps the Fn behaviour
-# on keys F2, F3, F4, F8, F9, F10, F11 and F12.
+# on keys F2, F3, F4, F6, F7, F8, F9, F10, F11 and F12.
 # It also binds the Fn+ESC to Ctrl+LeftWinLogo+Esc, which can
 # be used as keyboard shortcut into XFCE or other desktop
 # environments to execute a script and toggle the touchpad.
 #
-# Function keys F1, F6 and F7 cannot be remapped using
+# Function key F1 cannot be remapped using udev Hardware
-# udev Hardware Database (as far as I know).
+# Database (as far as I know).
 #
-# To make this file effective execute:
+# To make this file effective execute (please check the
+# input number using lsinput):
 #   systemd-hwdb update
 #   udevadm trigger --verbose /dev/input/event0
+#   udevadm trigger --verbose /dev/input/event7
 #
-# To view current binding:
+# To view current bindings:
 #   udevadm info /dev/input/event0
 #
@@ Line 217: / Line 219: @@
 #   KEYBOARD_KEY_76 => code 85  KEY_ZENKAKUHANKAKU
 #
-# Function keys F1, F6 and F7 do not generate events
+# Fn+F6 and Fn+F7 produce keys 64 and 65 (0x40 and 0x41).
-# (verified with evtest and showkey), so they cannot
-# be remapped.
-#
-# The following EV_KEY do not work:
-#   KEY_DISPLAYTOGGLE
-#   KEY_BRIGHTNESSDOWN
-#   KEY_BRIGHTNESSUP
 #
+# Function keys F1 does not generate events (verified with
+# evtest and showkey), so it cannot be remapped.
+# Teclast AT Keyboard input device.
 evdev:atkbd:dmi:bvnTECLAST:bvr*:bd*:svnTECLAST:pnF6:pvr*
  KEYBOARD_KEY_a0=f2
@@ Line 238: / Line 237: @@
  KEYBOARD_KEY_3d=volumedown
  KEYBOARD_KEY_3e=volumeup
+ KEYBOARD_KEY_40=brightnessdown
+ KEYBOARD_KEY_41=brightnessup
  KEYBOARD_KEY_42=previoussong
  KEYBOARD_KEY_43=nextsong
@@ Line 244: / Line 245: @@
  KEYBOARD_KEY_58=sysrq
  KEYBOARD_KEY_76=esc
+# F6 and F7 are connected to input "Intel HID events", not keyboard.
+evdev:name:Intel HID events:dmi:bvnTECLAST:bvr*:bd*:svnTECLAST:pnF6:pvr*
+ KEYBOARD_KEY_14=f6
+ KEYBOARD_KEY_13=f7
 </file>
@@ Line 287: / Line 293: @@
 </code>
-These keysyms do not produce the expected action; i.e. they don't do anything, despite I associate them to a key and depite that ''evtest'' and ''xev''do report the expected action:
+These keysyms do not produce the expected action; i.e. they don't do anything, despite I associate them to a key and despite that ''evtest'' and ''xev''do report the expected action:
   * XF86TouchpadToggle, XF86TouchpadOn, XF86TouchpadOff
@@ Line 332: / Line 338: @@
 WARNING: The **sleep** command was determined empirically, may be it is required to let the default ACPI routine to complete.
-Once the acpid service is restarted, every time you press the **BrightnessDown** and **BrightnessUp** keys, you get the brightness adjusted and also the key **F6** or **F7** simulated events.
+Once the acpid service is restarted, every time you press the **BrightnessDown** and **BrightnessUp** keys, you get the key **F6** or **F7** simulated events **along with the default brightness adjust**.
 To disable (or remap) the default brightness control behaviour we need to customize the input subsystem, disabilng or remapping the **Intel HID events** device. In this case customizing ACPI becomes pointless: you can obtain all the required mapping using only udev and hwdb (see above), leaving ACPI alone.