uvideo

[Patrick Welche <prlw1%cam.ac.uk@localhost>]

A usb webcam which works on other systems isn't recognised by NetBSD-current:
http://support.logitech.com/en_us/product/hd-pro-webcam-c910/specs

uvideo0 at uhub1 port 7 configuration 1 interface 2: Logitech (0x46d) product 0821 (0x821), rev 2.00/0.10, addr 5
...
uvideo_stream_init: error getting vs interface: INVAL (4)
uvideo_attach: error initializing stream: INVAL (4)
uvideo_attach: error: INVAL (4)

This appears to come from usbd_device2interface_handle()

    774 	if (ifaceno >= dev->ud_cdesc->bNumInterface)
    775 		return USBD_INVAL;

Could it be something like this camera has a microphone, which therefore
presents an interface which isn't a visual one?

Cheers,

Patrick