Message-ID: <45B314B0.4020907@zytor.com>
Date: Sat, 20 Jan 2007 23:22:24 -0800
From: "H. Peter Anvin" <hpa@zytor.com>
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To: Udo van den Heuvel <udovdh@xs4all.nl>
CC: linux-kernel@vger.kernel.org, Greg KH <greg@kroah.com>
Subject: Re: USB extension (repeater) cable
References: <45B0E672.4080404@xs4all.nl> <20070120000158.GD12615@kroah.com> <45B313AD.7080705@zytor.com> <45B31433.5000408@xs4all.nl>
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Udo van den Heuvel wrote:
> 
>> Actually, what it looks like is even simpler.  The extension cable
>> contains a four-port hub chip (which is the most common commodity chip)
>> and haven't bothered changing the descriptor to tell the computer only
>> one port is actually active.  So only one port can be activated, and the
>> others are stubbed out in some evil way.  In that case, it should be
>> noisy but harmless.
> 
> I will do some more testing then.
> Is there a way to get rid of the messages?

No, but you don't have to care about them.

	-hpa
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