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On my command line only Ubuntu machine, the login prompt occasionally shows a warning:

Ubuntu 12.04 LTS myserver tty1

myserver login: [833747.589882] ipheth: ipheth_rcvbulk_callback: urb status: -71

Nothing is obviously wrong with the system, and I can enter my username and password without issue.

What does this message mean and should I be worried about it?

Edit: I've found plugging in and then removing my iPhone from the computer causes this message. I'm still looking for what it means.

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