>From the 'dmesg' and 'lsusb', your problem may be related with split 
>transaction
schedule in ehci host controller driver, which is still not good enough now.

I guess that the camera may work well after you run the below command
on the machine with intel chipsets.

            $sudo rmmod ehci-hcd

This also explained why you can use the 1.1 uvc camera on VIA UHCI host
controller.

The current uvc configuration may set max packet size as 944, and 1023
is the max
allowed in USB 1.1 spec, which may consume 69% frame bandwidth, so it is
a bit difficult to submit the urb successfully in full speed bus or
split transaction
in high speed bus.

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1014749

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

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1014749/+subscriptions

-- 
ubuntu-bugs mailing list
[email protected]
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

Reply via email to