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Date:      Mon, 21 Apr 2008 20:11:28 +1000
From:      Peter Jeremy <peterjeremy@optushome.com.au>
To:        Tom Evans <tevans.uk@googlemail.com>
Cc:        stable@freebsd.org
Subject:   Re: umass causes panic on 7 amd64
Message-ID:  <20080421101128.GB73016@server.vk2pj.dyndns.org>
In-Reply-To: <1208766076.1940.35.camel@localhost>
References:  <20080415175347.GA29045@slackbox.xs4all.nl> <539c60b90804151134q7a25a141m1205a1b04d8ffc2c@mail.gmail.com> <20080415192028.GA31706@slackbox.xs4all.nl> <539c60b90804160910q3a242d7amb474b40065d6c9c6@mail.gmail.com> <1208373797.00057829.1208362805@10.7.7.3> <48071956.2090103@icyb.net.ua> <767FB33508C0E8E4E3CAA61A@utd65257.utdallas.edu> <200804172313.m3HNDHFo006697@hergotha.csail.mit.edu> <20080418224605.GA19226@server.vk2pj.dyndns.org> <1208766076.1940.35.camel@localhost>

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On Mon, Apr 21, 2008 at 09:21:16AM +0100, Tom Evans wrote:
>> My son's laptop (HP V6107au, nVIDIA MCP51 chipset, 6.x/amd64) gives
>> varying results (sometimes it works, sometimes it doesn't) and he's
>> found that plugging flashdisks into the USB hub on his keyboard gives
>> better results than plugging them into the system (which doesn't make
>> sense to me - they still show a attached to EHCI).

>Is the keyboard hub self powered? Maybe some devices draw more current
>than expected, causing fragile bus powered ports to fail (which would
>quickly cause a panic).

No.  All ports are bus-powered.

--=20
Peter Jeremy
Please excuse any delays as the result of my ISP's inability to implement
an MTA that is either RFC2821-compliant or matches their claimed behaviour.

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