linux-kernel - Re: Problems with p55-express and sleeping usb-hds

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Message-ID: <4AFDEB57.2050908@gmail.com>
Date:	Fri, 13 Nov 2009 17:27:19 -0600
From:	Robert Hancock <hancockrwd@...il.com>
To:	Alexander Holler <holler@...oftware.de>
CC:	linux-kernel@...r.kernel.org
Subject: Re: Problems with p55-express and sleeping usb-hds

On 11/13/2009 04:30 PM, Alexander Holler wrote:
> Hello,
>
> I'm having a problem with kernels (x86_64) <=2.6.32-rc7 (that means all
> kernels I tried, including the latest stable 2.6.31.6) on a Gigabyte
> P55M-UD4 mb (Bios F4l) with an Intel Core i7 860 and sleeping usb-hds.
>
> I don't have the problems when using the same usb-drives on a laptop
> with a core2duo (ICH8), so it seems to be a problem with the chipset
> (p55-express).
>
> The problem seems to occur when the usb-drive goes to sleep (because of
> inactivity) and the kernel tries to access them afterwards.
>
> Here are the excerpts from the log:
>
> ...
>
> (And here comes the problem)>
> Nov 13 19:47:34 krabat kernel: [ 2655.981980] usb 9-7: reset high speed
> USB device using ehci_hcd and address 3
> Nov 13 19:47:39 krabat kernel: [ 2661.120397] usb 9-7: device firmware
> changed
> Nov 13 19:47:39 krabat kernel: [ 2661.120489] usb 9-7: USB disconnect,
> address 3

That sounds like the device started reporting a different firmware 
string after it woke up, and the kernel decided it wasn't the same 
device anymore and triggered a disconnect/reconnect..
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