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Date: Fri, 08 Apr 2005 13:23:05 -0400
To: Doug White <dwhite@gumbysoft.com>,
	Mars Trading <marstrade@gmail.com>
From: Mike Tancsa <mike@sentex.net>
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cc: freebsd-stable@freebsd.org
Subject: Re: 5.4-STABLE kernel panic - usb related?
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At 12:55 PM 08/04/2005, Doug White wrote:

>This is a known bug.  ucom does some funky USB gyrations to force the port
>to flush and it trips over itself.  I don't have the PR handy but there's
>one filed with a description of the underlying issue from bde.

kern/79420

The patch that Ian Dowse provided fixed the panics for me.  Perhaps try it 
in your setup.  Note, this does not happen in CURRENT, only RELENG_5, but 
the patch does seem to work around the issue for me.

         ---Mike