On Thu, Jul 12, 2012 at 8:47 PM, Patrick Welche <[email protected]> wrote:
> Connecting the camera to it gets me a 640x480 image with cheese and
> guvcview. Slightly odd:
>
> Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
> Bus 004 Device 002: ID 046d:09a1 Logitech, Inc. QuickCam Communicate MP/S5500
>
> Is the camera really a USB 1.1 device? (I doubt it)

Maybe the enumeration on your uvc device is failed, then the port is handover
to 1.1 controller, but it is hard to say since you didn't post the 'dmesg' info.

>From the usbmon, we can just find the below failure:

ffff88040ae0a000 1105599665 S Zi:2:003:1 -115:1:0 32 -18:0:944
-18:944:944 -18:1888:944 -18:2832:944 -18:3776:944 30208 <
ffff88040ae0a000 1105599691 E Zi:2:003:1 -28 0


You didn't post the 'lsusb -v' on your uvc device, it is a bit
difficult to conclude
what is wrong about the schedule without the device descriptor info.

Also you didn't post the dmesg info, we still don't know if your uvc
device is plugged
into USB3 or USB2 bus.

Thanks,

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https://bugs.launchpad.net/bugs/1014749

Title:
  can't read uvcvideo (usb video / webcams) devices

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