Ubuntu – Disable numlock warning on lock screen for notebook

Because probably you put on the Slow Keys option from System Settings → Universal Access → Typing. Turn it off:

I have also written an application indicator which, in my opinion, looks better.

indicator-keyboard-led

It shows the state of the locks using filled/unfilled circles.

Default appearance of the indicator with Num lock on and Caps and Scroll locks off.

Menu of the indicator, shown on click. The locks can be toggled by clicking the respective item in the menu.

Alternative (short) appearance of the indicator.

You can also change which locks are displayed and in what order.

Installation:

sudo add-apt-repository ppa:adrianiainlam/indicator-keyboard-led
sudo apt-get update
sudo apt-get install indicator-keyboard-led

After installation the postinst script will prompt you for preferences configuration. Visit the GitHub repo for full explanation on these settings.

Usage:

The indicator will be configured to autostart on log-in. To start using the indicator after installation, log-out and log-in again, or manually start the indicator (search for "indicator-keyboard-led" in the dash).

The indicator should be shown at the top right corner, with a filled circle representing a lock turned on and an unfilled circle representing a lock turned off.

Clicking on the indicator should result in a menu with the three locks. Clicking on the menu item would cause the corresponding lock to toggle.

_{Bug reports and feature requests welcome.}