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From: Hans Petter Selasky <hselasky@c2i.net>
To: Andriy Gapon <avg@freebsd.org>
Date: Sun, 1 Apr 2012 23:29:06 +0200
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Cc: gnome <gnome@freebsd.org>, Joe Marcus Clarke <marcus@freebsd.org>
Subject: Re: Fwd: Re: calibre: kindle usb connection problem
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On Sunday 01 April 2012 23:19:07 Andriy Gapon wrote:
> on 02/04/2012 00:11 Hans Petter Selasky said the following:
> > On Saturday 31 March 2012 21:21:11 Joe Marcus Clarke wrote:
> >> On 3/29/12 1:46 PM, Andriy Gapon wrote:
> > 
> > Hi,
> > 
> > I think you need to open the device to be allowed to call
> > libusb20_dev_req_string_simple_sync, like shown in the previous function
> > call list.
> > 
> > Does that make sense to you?
> 
> Not really... :-)
> How does that cause the disconnect and reconnect?
> 

Hi,

> [snip]

If the string you are asking for doesn't exist in the firmware, maybe it 
generates a NULL pointer fault, and then the kindle crashes?

You can also try:
sysctl hw.usb.no_cs_fail=1

Not sure if it helps.

Could you use usbdump, and the version from 9-stable or -current, and make a 
USB trace file using the "-f" option one or more times to get only the kindle 
related devices.

Then send me a link to that, and I'll have a look.

--HPS