upower - a

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Device: /org/freedesktop/UPower/devices/DisplayDevice
  power supply:         no
  updated:              Son 03 Jul 2016 17:49:35 CEST (7279 seconds ago)
  has history:          no
  has statistics:       no
  unknown
    warning-level:       none
    icon-name:          ''

Daemon:
  daemon-version:  0.99.4
  on-battery:      no
  lid-is-closed:   no
  lid-is-present:  no
  critical-action: PowerOff