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evtest

Display information from input device drivers. More information: https://manned.org/evtest.

List all detected input devices:

sudo evtest

Display events from a specific input device:

sudo evtest /dev/input/event{{number}}

Grab the device exclusively, preventing other clients from receiving events:

sudo evtest --grab /dev/input/event{{number}}

Query the state of a specific key or button on an input device:

sudo evtest --query /dev/input/event{{number}} {{event_type}} {{event_code}}