Re: 3.2.12: eSATA device plugin results in reset of EXTERNAL USB2.0 hub-connected devices?

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Alan Stern wrote:
> On Sat, 14 Apr 2012, Martin Mokrejs wrote:
> 
>> Hi Alan,
>>   sorry I couldn't resists and post yet another attempt, this time 3.3.2 kernel. ;)
>> I think I have some news, good news (at least for me). ;-)
> 
> ...
> 
>> Alan, what do you think of the "EMI?" reset now?
> 
> You included so much detail in your message that I have lost track of
> the point.  Weren't you asking the reason why the keyboard or trackpad
> got disconnected?  I explained that the hub did this, i.e., it disabled
> the keyboard's port, for unknown reasons.  (That thing about "EMI" in 
> the log message is just a guess; there's no way to know why the hub 
> behaved the way it did.  Have you tried using a different hub?)
> 
> As far as I can see, the hub is still behaving the same way.  So what 
> is your question?

First:

Why is kernel trying to reset devices connected to the hub. In my eyes, kernel
was trying hard to do the reset. Otherwise, what these lines mean? Why would the external
hub ask kernel to do its own reset?
And why is the "EMI?" line in the middle of the looping cycle? Doesn't this show
kernel is at fault?

No, I don't have any other hub, but could buy some, sure. But is always a gamble
which one is really a good one. :(

generic-usb 0003:04F2:0116.0007: can't reset device, 0000:00:1d.0-1.2.1/input0, status -71
generic-usb 0003:046D:C050.0008: can't reset device, 0000:00:1d.0-1.2.4/input0, status -71
generic-usb 0003:04F2:0116.0007: can't reset device, 0000:00:1d.0-1.2.1/input0, status -71
generic-usb 0003:046D:C050.0008: can't reset device, 0000:00:1d.0-1.2.4/input0, status -71
generic-usb 0003:04F2:0116.0007: can't reset device, 0000:00:1d.0-1.2.1/input0, status -71
generic-usb 0003:046D:C050.0008: can't reset device, 0000:00:1d.0-1.2.4/input0, status -71
generic-usb 0003:04F2:0116.0007: can't reset device, 0000:00:1d.0-1.2.1/input0, status -71
generic-usb 0003:046D:C050.0008: can't reset device, 0000:00:1d.0-1.2.4/input0, status -71
generic-usb 0003:04F2:0116.0007: can't reset device, 0000:00:1d.0-1.2.1/input0, status -71
generic-usb 0003:046D:C050.0008: can't reset device, 0000:00:1d.0-1.2.4/input0, status -71
generic-usb 0003:04F2:0116.0007: can't reset device, 0000:00:1d.0-1.2.1/input0, status -71
generic-usb 0003:046D:C050.0008: can't reset device, 0000:00:1d.0-1.2.4/input0, status -71
generic-usb 0003:04F2:0116.0007: can't reset device, 0000:00:1d.0-1.2.1/input0, status -71
generic-usb 0003:046D:C050.0008: can't reset device, 0000:00:1d.0-1.2.4/input0, status -71
generic-usb 0003:04F2:0116.0007: can't reset device, 0000:00:1d.0-1.2.1/input0, status -71
generic-usb 0003:046D:C050.0008: can't reset device, 0000:00:1d.0-1.2.4/input0, status -71
generic-usb 0003:04F2:0116.0007: can't reset device, 0000:00:1d.0-1.2.1/input0, status -71
generic-usb 0003:046D:C050.0008: can't reset device, 0000:00:1d.0-1.2.4/input0, status -71
generic-usb 0003:04F2:0116.0007: can't reset device, 0000:00:1d.0-1.2.1/input0, status -71
generic-usb 0003:046D:C050.0008: can't reset device, 0000:00:1d.0-1.2.4/input0, status -71
hub 2-1.2:1.0: port 1 disabled by hub (EMI?), re-enabling...
usb 2-1.2.1: USB disconnect, device number 13
generic-usb 0003:046D:C050.0008: can't reset device, 0000:00:1d.0-1.2.4/input0, status -71
generic-usb 0003:046D:C050.0008: can't reset device, 0000:00:1d.0-1.2.4/input0, status -71
generic-usb 0003:046D:C050.0008: can't reset device, 0000:00:1d.0-1.2.4/input0, status -71
generic-usb 0003:046D:C050.0008: can't reset device, 0000:00:1d.0-1.2.4/input0, status -71
generic-usb 0003:046D:C050.0008: can't reset device, 0000:00:1d.0-1.2.4/input0, status -71
generic-usb 0003:046D:C050.0008: can't reset device, 0000:00:1d.0-1.2.4/input0, status -71
generic-usb 0003:046D:C050.0008: can't reset device, 0000:00:1d.0-1.2.4/input0, status -71
generic-usb 0003:046D:C050.0008: can't reset device, 0000:00:1d.0-1.2.4/input0, status -71
generic-usb 0003:046D:C050.0008: can't reset device, 0000:00:1d.0-1.2.4/input0, status -71
generic-usb 0003:046D:C050.0008: can't reset device, 0000:00:1d.0-1.2.4/input0, status -71
generic-usb 0003:046D:C050.0008: can't reset device, 0000:00:1d.0-1.2.4/input0, status -71
generic-usb 0003:046D:C050.0008: can't reset device, 0000:00:1d.0-1.2.4/input0, status -71
generic-usb 0003:046D:C050.0008: can't reset device, 0000:00:1d.0-1.2.4/input0, status -32



Second:

How can I enable my eSATA port? I did not reboot yet, so how can I dump current status of
the eSATA port  which does not recognize any new devices. I hope this is a driver issue
and not a hardware issue. So if I can provide some debug info for anybody I would be glad
if that helps to find out why the eSATA port claims to be dead completely.

Martin
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