On Sun, 23 Oct 2011, Neeraj Jakhar wrote: > I plugged in the USB modem device while usbmon was running. I hope > this is what you were expecting. The resultant log (gzipped) is > attached with the mail. > Please let me know if you expected something else. > > Another thing to note would be, erring system is AMD 64 bit system, > while the system where modem is working is x86 32-bit. The kernel as > well as GNU/Linux on both the boxes is 32 bit though. [Additional > information if it is of any use: The installation from 32-bit was > dumped as is on to the 64-bit system (with a few tweaks here and > there), and everything was working until I started using this USB > modem.] The type of system doesn't matter; what matters is the USB hardware. The usbmon trace shows that the modem gets disconnected whenever the OHCI controller on the AMD system issues a reset. This could be the fault of the modem or of the controller. Do any other full-speed devices work on this system? Also, have you tried attaching a USB hub between the computer and the modem? 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
