Just suggestion. Here is one part form kernel config:
│ CONFIG_USB_EHCI_TT_NEWSCHED:
│
│
│
│ This changes the periodic scheduling code to fill more of the low
│
│ and full speed bandwidth available from the Transaction Translator
│
│ (TT) in USB 2.0 hubs. Without this, only one transfer will be
│
│ issued in each microframe, significantly reducing the number of
│
│ periodic low/fullspeed transfers possible.
│
│
│
│ If you have multiple periodic low/fullspeed devices connected to a
│
│ highspeed USB hub which is connected to a highspeed USB Host
│
│ Controller, and some of those devices will not work correctly
│
│ (possibly due to "ENOSPC" or "-28" errors), say Y. Conversely, if
│
│ you have only one such device and it doesn't work, you could try
│
│ saying N.
If in this issue, report this bag on uvc maeling list, may be we can help you.
http://www.ideasonboard.org/uvc/faq/
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https://bugs.launchpad.net/bugs/1014749
Title:
can't read uvcvideo (usb video / webcams) devices
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