On Fri, 25 Oct 2013, Dave Jones wrote:

> Xhci got a lot noisier since I recently updated my phone to the newer version 
> of iOS.
> Possibly it's related to the new feature where it pops up a dialog on the 
> phone
> asking if I trust the machine I've plugged into?
> 
> This is from an 3.12-rc6 kernel:
> 
> xhci_hcd 0000:00:14.0: Port Status Change Event for port 2
> xhci_hcd 0000:00:14.0: resume root hub
> xhci_hcd 0000:00:14.0: handle_port_status: starting port polling.
> usb usb3: usb wakeup-resume
> usb usb3: usb auto-resume
> hub 3-0:1.0: hub_resume
> xhci_hcd 0000:00:14.0: get port status, actual port 0 status  = 0x2a0
> xhci_hcd 0000:00:14.0: Get port status returned 0x100
> xhci_hcd 0000:00:14.0: get port status, actual port 1 status  = 0x20ae1
> xhci_hcd 0000:00:14.0: Get port status returned 0x10301
...

All, or almost all, of these are merely debug-level messages.

Besides, how does this differ from what you get when you plug in a 
phone running the older iOS?

Alan Stern

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