On Fri, 2 Mar 2012, Edwin Mercado wrote: > Thanks Alan for sharing. Attached are the traces and below are the > results from lsusb -v. I wonder why the lsusb output doesn't show the right string descriptors. If you mount a debugfs filesystem on /sys/kernel/debug, what do you see in /sys/kernel/debug/usb/devices? > >> �Running the test > >> consecutive times gives the same result. However, when I capture the > >> USB traces (attached) I notice the following. > > > > You forgot to attach the traces. > > > Attached this time. I'm using LeCroy USB Analyzer. > I captured the transactions following these commands: > > # ./testusb -a -c 1 -v 1 -t 8 > # ./testusb -a -c 1 -v 1 -t 8 > # ./testusb -a -c 1 -v 1 -t 8 I'm not going to be able to get the LeCroy display tool working on my Linux-based computer any time soon. Can you describe what the trace shows? Also, have you tried using usbmon on the host? That often provides more insight than a logic trace. See the instructions in Documentation/usb/usbmon.txt. 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
