evtest

LibreELEC:~ # evtest
No device specified, trying to scan all of /dev/input/event*
Available devices:
/dev/input/event0:      aml_keypad
/dev/input/event1:      gpio_keypad
/dev/input/event2:      cec_input
/dev/input/event3:      2.4G 2.4G Wireless Device
/dev/input/event4:      2.4G 2.4G Wireless Device
/dev/input/event5:      2.4G 2.4G Wireless Device
Select the device event number [0-5]: 2
Input driver version is 1.0.1
Input device ID: bus 0x10 vendor 0x1b8e product 0xcec version 0x1
Input device name: "cec_input"
Supported events:
  Event type 0 (EV_SYN)
  Event type 1 (EV_KEY)
    Event code 2 (KEY_1)
    Event code 3 (KEY_2)
    Event code 4 (KEY_3)
    Event code 5 (KEY_4)
    Event code 6 (KEY_5)
    Event code 7 (KEY_6)
    Event code 8 (KEY_7)
    Event code 9 (KEY_8)
    Event code 10 (KEY_9)
    Event code 11 (KEY_0)
    Event code 28 (KEY_ENTER)
    Event code 52 (KEY_DOT)
    Event code 103 (KEY_UP)
    Event code 105 (KEY_LEFT)
    Event code 106 (KEY_RIGHT)
    Event code 108 (KEY_DOWN)
    Event code 113 (KEY_MUTE)
    Event code 114 (KEY_VOLUMEDOWN)
    Event code 115 (KEY_VOLUMEUP)
    Event code 116 (KEY_POWER)
    Event code 128 (KEY_STOP)
    Event code 139 (KEY_MENU)
    Event code 158 (KEY_BACK)
    Event code 161 (KEY_EJECTCD)
    Event code 163 (KEY_NEXTSONG)
    Event code 164 (KEY_PLAYPAUSE)
    Event code 165 (KEY_PREVIOUSSONG)
    Event code 166 (KEY_STOPCD)
    Event code 167 (KEY_RECORD)
    Event code 168 (KEY_REWIND)
    Event code 172 (KEY_HOMEPAGE)
    Event code 174 (KEY_EXIT)
    Event code 200 (KEY_PLAYCD)
    Event code 201 (KEY_PAUSECD)
    Event code 208 (KEY_FASTFORWARD)
    Event code 226 (KEY_MEDIA)
    Event code 256 (BTN_0)
    Event code 362 (KEY_PROGRAM)
    Event code 363 (KEY_CHANNEL)
    Event code 366 (KEY_PVR)
    Event code 386 (KEY_TUNER)
    Event code 398 (KEY_RED)
    Event code 399 (KEY_GREEN)
    Event code 400 (KEY_YELLOW)
    Event code 401 (KEY_BLUE)
    Event code 402 (KEY_CHANNELUP)
    Event code 403 (KEY_CHANNELDOWN)
    Event code 765 (?)
Properties:
Testing ... (interrupt to exit)
***********************************************
  This device is grabbed by another process.
  No events are available to evtest while the
  other grab is active.
  In most cases, this is caused by an X driver,
  try VT-switching and re-run evtest again.
  Run the following command to see processes with
  an open fd on this device
 "fuser -v /dev/input/event2"
***********************************************