What is the meaning of "UPower-Linux-WARNING **: unhandled action 'bind'" messages?

Solution Verified - Updated -

Issue

  • After attaching usb device, system reported below messages:
"upowerd: (upowerd:9467): UPower-Linux-WARNING **: unhandled action 'bind' on /sys/devices/pci0000:00/0000:00:18.0/usb2/2-4/3-6:9.0"
  • While detaching usb device, system reported below messages:
"upowerd: (upowerd:9467): UPower-Linux-WARNING **: unhandled action 'unbind' on /sys/devices/pci0000:00/0000:00:18.0/usb2/2-4/3-6:9.0"
  • What does these messages indicate?

Environment

Red Hat Enterprise Linux 7

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