On Tue, 28 Oct 2014, Naveen Kumar Parna wrote: > >> You should also run a similar test when you connect the device through > >> a USB-2 hub. In fact, you should run two tests. In one test, connect > >> the analyzer to the cable segment between the computer and the hub; in > >> the other test, connect the analyzer to the cable segment between the > >> hub and the device. > >> > > > > I connected the USB analyzer to the cable segment between the computer > and the external USB-2 hub(devices are attached to this external USB-2 > hub). In this scenario , got the stall in usbmon trace, but not in > analyzer log. But USB analyzer log shows “Incomplete IN transaction”. > Please check the attached "Elisys_Usb_log.png". > > > > Incomplete IN transaction 2 1 > INCOMPLETE HS No data 884.626 273 217 > Does it gives any clue? Not really. I think your analyzer output is incomplete. For example, a high-speed Interrupt transaction to a full-speed device should have a Start Split packet and a Complete Split packet. I don't see either of those in your picture. > For the second test(connect the analyzer to the cable segment between > the hub and the device): Is it possible with single external USB hub? Of course it is. What's the difficulty? Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-bluetooth" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
