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From: Stefan Ehmann <shoesoft@gmx.net>
To: Hans Petter Selasky <hselasky@c2i.net>
Date: Thu, 13 Nov 2008 20:18:03 +0100
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Cc: freebsd-current@freebsd.org
Subject: Re: usb2: scanner no longer working
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On Thursday 13 November 2008 19:52:50 Hans Petter Selasky wrote:
> On Thursday 13 November 2008, Stefan Ehmann wrote:
> > On Thursday 13 November 2008 18:04:00 Hans Petter Selasky wrote:
> > > On Thursday 13 November 2008, Stefan Ehmann wrote:
> > > > On Thursday 13 November 2008 16:57:55 Hans Petter Selasky wrote:
> > > > > On Thursday 13 November 2008, Stefan Ehmann wrote:
> > > > > > On Friday 07 November 2008 19:35:17 Hans Petter Selasky wrote:
> > > > > > > On Friday 07 November 2008, Stefan Ehmann wrote:
> > > > > > > > On Friday 07 November 2008 18:42:49 Hans Petter Selasky wrote:
> > > > > > > > > On Friday 07 November 2008, Hans Petter Selasky wrote:
> > >
> > > You could also try:
>
> What is printed when:
>
> sysctl hw.usb2.dev.debug=15
>
> In dmesg ?
>
> It should print out device related debugging. I think you maybe entered:
>
> sysctl hw.usb2.debug=15
Oops, you're right

New log here:
http://stud4.tuwien.ac.at/~e0125637/fbsd/scanimage.log

BTW time stamps don't seem to be accurate. i.e. messages during the hang are 
logged at the time when the device is unplugged.