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From: Hans Petter Selasky <hselasky@c2i.net>
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Date: Mon, 10 Nov 2008 18:06:02 +0100
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Cc: 
Subject: Re: usb2 stack.
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On Monday 10 November 2008, Takanori Watanabe wrote:
> FOMA driver does not work properly.
> 1. AT-command interface does not probed.
> 2. Interface mode does not properly transit.(Especially on device close.)
> 3. All sysctls to indicate interface mode is disappeard.(Not so difficult.)
>
> I try to work on the second item of the list.
> How can I trace device requests for host controller?

You can turn on debugging by:

sysctl hw.usb2.debug=15

--HPS