To disable the numeric keypad in Gnome, you can use the Mouse & Touchpad settings.
To access the Mouse & Touchpad settings, follow these steps:
Open the Settings application. You can do this by clicking on the Settings icon in the top bar, or by pressing the Super key (also known as the Windows key) and typing Settings.
In the Settings application, click on the Devices category and then click on the Mouse & Touchpad tab.
In the Mouse & Touchpad settings, scroll down to the Mouse Keys section.
In the Mouse Keys section, turn off the toggle switch for the Turn on Mouse Keys option.
This will disable the numeric keypad in Gnome.
Alternatively, you can use the dconf-editor utility to disable the numeric keypad in Gnome. To disable the numeric keypad using dconf-editor, follow these steps:
dconf-editor package using the apt command:$ sudo apt install dconf-editor
Run the dconf-editor command.
In the dconf-editor window, navigate to the org > gnome > desktop > peripherals > mouse > enable-mousekeys setting.
Uncheck the enable-mousekeys setting to disable the numeric keypad in Gnome.
Note that you may need to log out and log back in for the changes to take effect.
You can also use the gsettings command to disable the numeric keypad in Gnome. To disable the numeric keypad using gsettings, use the following command:
$ gsettings set org.gnome.desktop.