Hi Jean,

On Wed, Oct 23, 2019 at 03:18:59PM +0200, Jean Delvare wrote:
> Hi all,
> When my Logitech C270 webcam is plugged in, my kernel log gets filled
> with this message:
> usb 3-4.1: reset high-speed USB device number 4 using xhci_hcd
> every 5 seconds. I have the same problem on 3 different Intel-based
> computers (different generations), using 2 different webcams, same
> brand "same model".
> Is Logitech doing crappy hardware these days, or are we doing something
> wrong? Is there any way to know the reason that triggers the reset?

Is this before or after the uvcvideo driver gets involved ? One easy way
to check is to move the uvcvideo.ko module out of the way so that it
doesn't get loaded automatically (or just blacklist it in
/etc/modprobe.d/) and then plug the camera.

> I would be more than happy to provide any relevant debugging
> information if anyone is able to make it stop. As it stands, I must
> plug my webcam before using it and unplug it as soon as I'm done, which
> isn't exactly convenient.


Laurent Pinchart

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