Please always use Reply-To-All. If you send message to me only then nobody else on the mailing list will see them and so they won't be able to help you. On Tue, 18 Aug 2009, Dennis Veatch wrote: > On Monday 17 August 2009 3:49:00 pm you wrote: > > On Mon, 17 Aug 2009, Dennis Veatch wrote: > > > > You should use usbmon to capture the communication between the computer > > > > and the drive. For instructions, see Documentation/usb/usbmon.txt in > > > > the kernel source. > > > > > > > > Alan Stern > > > > > > > > -- > > > > > > Ok, here is what I got but the it caused a hard lock up about 2 seconds > > > after plugging in the device.Used `cat /sys/kernel/debug/usbmon/0u`. Hope > > > its helpful; > > > > Unforunately it isn't. It stops just before the point where > > usb-storage gets involved. > > > > If you're doing all this from an X window, you might want to try using > > a VT instead. If the system crashes you'll stand a better change of > > seeing the error messages. > > > > Alan Stern > > > > -- > > Well, I am stuck now. After several attempts of killing X and trying usbmon > from the good ol console; as soon as enter is pressed to cat the output of > usbmon, the system hard locks and gives no more information than I have > already posted. I have no idea how to get around it. Have you tried using copying the 1u file instead of 0u? Does the lockup occur even before there is any USB activity? For example, suppose you don't have any USB devices plugged in when you start the "cat" program. Does the system still lock up immediately, or does it wait until you plug in a device? 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
