From owner-freebsd-usb@FreeBSD.ORG  Mon Dec  5 14:13:52 2005
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From: Hans Petter Selasky <hselasky@c2i.net>
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Date: Mon, 5 Dec 2005 15:15:07 +0100
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Message-Id: <200512051515.08318.hselasky@c2i.net>
Cc: Tilman Linneweh <arved@arved.at>
Subject: Re: Panic in ugen_detach
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On Sunday 04 December 2005 14:21, Tilman Linneweh wrote:
> Hi,
>
> Today i disconnected my Webcam (Creative Vista), while the device was still
> opened by spcaview.
>
> It resulted in a panic with the following trace:
>

I have rewritten the ugen driver from scratch. Maybe you could try to 
reproduce with my USB driver:

Download the three files below into a new directory and type 
"make install"  (to uninstall type "make deinstall")
http://home.c2i.net/hselasky/isdn4bsd/privat/usb/Makefile
http://home.c2i.net/hselasky/isdn4bsd/privat/usb/new_usb_1_5_4.diff.bz2
http://home.c2i.net/hselasky/isdn4bsd/privat/usb/new_usb_1_5_4.tar.bz2

Type "make help" to get more help.

--HPS