linux-kernel - Re: Logitech HD Webcam C525 does not work when connected to USB 2 port, works on USB 3

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Date:	Mon, 2 Jul 2012 20:40:58 -0400 (EDT)
From:	Alan Stern <stern@...land.harvard.edu>
To:	Frederik Himpe <fhimpe@...enet.be>
cc:	linux-kernel@...r.kernel.org, <linux-usb@...r.kernel.org>,
	<linux-uvc-devel@...ts.sourceforge.net>
Subject: Re: Logitech HD Webcam C525 does not work when connected to USB 2
 port, works on USB 3

On Mon, 2 Jul 2012, Frederik Himpe wrote:

> > Have you tried using the webcam on a different computer?
> 
> I just tried it on a different system (Dell Latitude E6400), and it
> worked fine on the USB2 ports (kernel version was 3.4.1 on that system,
> though). The webcam also works fine on the affected system and USB2
> ports in Windows.

What happens if you disable USB runtime suspend on the affected system?  
Windows tends not to use it.

Alan Stern

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