Dears, The usb 1.1 webcam can not work behind usb 2.0 hub when there is a usb 1.1 mouse behind the hub, too. We check ehci driver in ehci-sched.c , the "tt_available" function will return 0 since "multi-uframe xfer can't fit in frame 7 uframe 0" , hence, ISO pipe can NOT submit urb successfully Do you have any idea about: Is it the constrain in USB application? i.e. user can not use usb1.1 web cam and mouse behind usb 2.0 hub simultaneously? Is there any bug fix about this kind of issues? Best Regards, Brad -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
