Jtdcftul

Here is a little switch button to enable and disable a specific keyboard.
First, you have to find your keyboard id with xinput or xinput-list.

Bash script to enable/disable keyboard

#!/bin/bash

Icon="/PATH/TO/ICON_ON"

Icoff="/PATH_TO_ICON_OFF"

fconfig=".keyboard" 

id=12



if [ ! -f $fconfig ];

    then

        echo "Creating config file"

        echo "enabled" > $fconfig

        var="enabled"

    else

        read -r var< $fconfig

        echo "keyboard is : $var"

fi



if [ $var = "disabled" ];

    then

        notify-send -i $Icon "Enabling keyboard..."  "ON - Keyboard connected !";

        echo "enable keyboard..."

        xinput enable $id

        echo "enabled" > $fconfig

    elif [ $var = "enabled" ]; then

        notify-send -i $Icoff "Disabling Keyboard"  "OFF - Keyboard disconnected";

        echo "disable keyboard"

        xinput disable $id

        echo 'disabled' > $fconfig

fi

Configuration

• 
  Icon as the path of icon to display when enabling (for instance, /home/user/path/icon.png)


• 
  Icoff as the path of the icon to display when disabling



• I used the following icons :
  




• id as the keyboard id (found it with xinput)



• 
  fconfig path to config file. Change if you want to create configuration file in another directory

Don't try to run the script if you can't run it again without the use of your keyboard (unless you got another keyboard of course). Create the following launcher (in home/user/.local/share/applications) and add it to unity :

Desktop entry (Unity launcher)

[Desktop Entry]

Version=1.0

Type=Application

Name=Clavier ON-OFF

Icon=PATH/TO/YOUR/ICON

Exec=bash NAME_OF_YOUR_SCRIPT.sh

Path=PATH/TO/YOUR/SCRIPT

NoDisplay=false

Categories=Utility;

StartupNotify=false

Terminal=false

RESULT :

Launcher:

Notifications:

I thought of 2 ways you can do this:

1. By setting up a wrong model for your laptop keyboard in xorg.conf ?




2. By installing Lock-keyboard-for-Baby

`Lock-keyboard-for-Baby or lk4b in short, is a small program which locks your keyboard but leaves your mouse free. I wrote it because my niece likes to bash away at my keyboard whenever she sees me sit down at it. Keys typed on a keyboard can have disastrous consequences and I didn't want to lock my screen all the time with a screensaver.

When started, lock-keyboard-for-baby opens a small window which grabs the keyboard and echos keys which are typed. By default, it tells you what to type to quit ("Quit Now").

Unlike a screensaver, your screen is not blocked and the mouse still partially works, so you can still see what is on your screen - keep watching tv / video and/or read a document using the mouse to scroll.`

Requirements:

· GTK >= 2.x
· perl GTK2 bindings (perl-gtk2 or gtk2-perl depending on your system)

One sure way to disable it is to unplug the signal cable. You need to pop up the keyboard for that. For information on how to do that, check out the Maintenance and Service Guide for the HP Pavilion dv9000 and dv9200 Notebook PC .

Now there is a way to disable the keyboard using xinput. T do that, just press Ctrl+Alt+T on your keyboard to open Terminal. When it opens, run the commands below.

To list the devices your X

xinput --list

To disable the keyboard:

xinput set-int-prop 2 "Device Enabled" 8 0

To enable the keyboard again:

xinput set-int-prop 2 "Device Enabled" 8 1

If you get a error about permissions, use the commands above with sudo.

For Disabling Laptop's internal keyboard permanently On Ubuntu, Need pass this i8042.nokbd Kernel parameters for not to check/create keyboard port

i8042.nokbd [HW] Don't check/create keyboard port

Open terminal and run the following command

$sudo gedit /etc/default/grub

Try to find the following line

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"

Add parameter i8042.nokbd, the above line should be looks like this

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash i8042.nokbd"

Update grub as following command

$sudo update-grub     

Then reboot your laptop computer.

Device id's received from xinput list as suggested in accepted answer are sometimes somehow changed on reboot (at least on my PC) which resulted in disabling wrong device.

That's why I've ended using device name instead of id, e.g.:

xinput disable "AT Translated Set 2 keyboard"

For example to temporarly disable de keyboard for clean up:

$ xinput float id#;sleep t;xinput reattach id# master#

t -time to sleep in seconds

id# and master# as mentioned above (top of all),for example on my notebook:

$ xinput float 11;sleep 5 ;xinput reattach 11 3

I just added this because I like to clean the keyboard all the time. I have to reboot, so I discover this!

Try running xmodmap -e 'keycode 24=' to disable just the Q key. If that works, you could add it it to your ~/.bashrc or global /etc/bash.bashrc file. I got this idea from here, which shows all the key-mappings.

For what it's worth, based on previous answers and my own playing around, I created the following script, which I call toggle_keyboard.sh and place in my ~/bin path. I have a keyboard shortcut that runs it set to CtrlWinK.

Some problems with the previous answers and benefit of my script:

• Relying on an id number with xinput fails when you reboot and the id number is changed. This happened to me when running xinput float 13. I ended up disabling the wrong hardware.


• Relying on a file to hold the enabled/disabled state will fail if you reboot as well. The file will tell you the keyboard is disabled (if you disabled it with the script), but after a reboot it will be enabled again. My solution gets the enabled/disabled information from a parsed xinput command.


• My script will work with any xinput device that shows up when you type xinput list --name-only. Just get the name and edit the top four variables. I use it for my laptop keyboard, webcam, touchscreen monitor and a few other things I use only once in a while.

#!/bin/bash

# Toggle the laptop keyboard either on or off and notify the user about it



# Device name can be found by typing this command: xinput list --name-only

DEVICE_NAME="AT Translated Set 2 keyboard"

# The display name of the device in the notify-send popup

DEVICE_DISPLAY_NAME="Laptop Keyboard"



# Set these to the icons you want to use.

# If they are not found, the notification will still work.

ICON_ENABLE="$HOME/.icons/keyboard.png"

ICON_DISABLE="$HOME/.icons/keyboard_disabled.png"



function xinput_set_prop() {

        xinput set-prop "$DEVICE_NAME" "Device Enabled" $1

}



function notify_change() {

        if [ -f "$1" ]; then

                notify-send --urgency=low --icon="$1" "$2"

        else

                notify-send --urgency=low "$2"

        fi

}



# Returns 1 if device is enabled, 0 if disabled

is_enabled=$(xinput list-props "$DEVICE_NAME" | grep "Device Enabled" | awk '{ print $4 }' | sed 's/[^0-9]*//g')



if [ $is_enabled -eq 1 ]; then

        # device is enabled, so disable it

        xinput_set_prop 0

        notify_change "$ICON_DISABLE" "$DEVICE_DISPLAY_NAME Disabled"

else

        # device is disabled, so enable it

        xinput_set_prop 1

        notify_change "$ICON_ENABLE" "$DEVICE_DISPLAY_NAME Enabled"

fi

xinput float "AT Translated Set 2 keyboard"

After spending hours over years with different methods with different distros and releases. The above terminal command is what I rely on after problems..... I use this now with neon plasma and was using it a month ago in straight ubuntu 18.04.
(needs applying after restart - can be placed in startup)

I had a problem with a stuck key, there is a command somewhere that you can put into terminal and it will automatically disable it every time on startup, I am no programmer and I can't remember i (I just copy and paste into terminal, I have no clue how you guys know this stuff, or how you all can come up with different versions lol), had it on mint 17, but I also know there is one you can even put in so it disables it even before you login, although I never did that as it is more involved

But what I have done, is go into settings, keyboard ( on mint 18 xfce you click back where the start menu used to be and go to system then keyboard) and you can disable repeat keys, it's just a box you uncheck you'll see it, you'll still have to use your usb keyboard as if you use the other it will retype the offending letter every other key, but it does the job perfectly

By the way thank you all for helping me with computers over the years whoever you guys are, you rock, had win 8 and my computer like ev eryone elses who had a notebook touchscreen just couldn't handle it, and through your discussions on here I have kept going, you are heroes :)