From owner-freebsd-usb@FreeBSD.ORG  Mon Jul 16 09:20:45 2007
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From: Hans Petter Selasky <hselasky@c2i.net>
To: freebsd-current@freebsd.org,
 w0lfie@clear.net.nz
Date: Mon, 16 Jul 2007 11:20:45 +0200
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Cc: current@freebsd.org, freebsd-usb@freebsd.org
Subject: Re: ukbd patch advice
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Hi,

Could you try the HPS USB stack first?

http://www.turbocat.net/~hselasky/usb4bsd

Download the SVN version. You need FreeBSD 6.2.

What processor type are you using ?

It might be that the USB interrupt handler uses the wrong buffer size.

If it is the same, turn on debugging:

sysctl usb.ukdb.debug=15

I know that that the ukdb driver is called without Giant locked in the 
official USB stack, for example, which might lead to races.

--HPS