Man page 1 : xkbvleds

xkbvleds - XKB extension user utility

xkbvleds [-indpy <name>] [-watch <leds>] [[-+]automatic] [[-+]explicit] [[-+]name] [[-+]real] [[-+]virtual] [-intersection] [-union]

This program is used to display the state of LEDs on an XKB keyboard. It reports the changes in the fundamental components of the XKB state which includes the effective compatibility state. The default set of LEDs is -union +name +automatic +real.

-indpy <name>

        Mask of LEDs to watch

-watch <leds>

        turn on synchronization

\[-+]automatic

        (Don't) watch automatic LEDs

\[-+]explicit

        (Don't) watch explicit LEDs

\[-+]name

        (Don't) watch named LEDs

\[-+]real

        (Don't) watch real LEDs

\[-+]virtual

        (Don't) watch virtual LEDs

-intersection

        Watch only LEDs in all desired sets

-union

        Watch LEDs in any desired sets