Re: EHCI: port power regression when canceling suspend-to-disk

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On Mon, 1 Apr 2013, Matthijs Kooijman wrote:

> Hi Alan,
> 
> > So either something more complicated is happening, or I messed up my
> > bisection results. I'll retest the rev under suspicion and its parent
> > and get back to you.
> Seems you were right: The revision I bisected to was not the culprit.

I have a healthy distrust for bisection results.  More often than one 
would think, people end up at the wrong place.

> It seems that there is some other factor involved that I'm not aware of,
> since all of the revisions I re-tested that were previously good, now
> tested as bad (including the 3.3 version I originally used as the base
> for my bisecting).
> 
> In other words: bisecting seems useless, so I'll try to debug this
> as-is. Any suggestions on things to look at, perhaps?

What happens if you unplug all your USB devices from the docking
station, so that its hub gets runtime suspended?  Does it still
disconnect?

Alan Stern

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