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SubjectRe: 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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