On Wed, 10 Sep 2014, Kasberger Andreas wrote: > We have a problem with a CDC device that simulates a serial > interface. Problem is that the host stops CDC BULK IN transfers after > a while on those USB2.0 ports that are connected to the chip set's > internal rate matching hub, others seem to work fine. Here you say that ports connected to the rate-matching hub _fail_. > ... to prevent confusion please note: Problem can only be reproduced > on those USB2.0 ports that are NOT HANDLED by chip set's rate > matching hub. > > If we disable USB3.0 within the BIOS (or remove USB3.0 Linux drivers) > all ports are handled via rate matching hub and therefore all ports > seem to work, in that case the error cannot be reproduced anymore at > any port. Here you say that ports connected to the rate-matching hub _work_. Note that the xHCI host controller does not use the rate-matching hub. Alan Stern -- 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
