Hi, I have a beginner question. I apologise in case there is some reiteration with the topics already available in the list. Suppose I want to upgrade the OS of a USB device using a manufacturer-provided Windows updater. How can I log the data which is sent to and from the device? My intent is to run the updater under qemu and log the generated traffic. Can this be achieved and how? The device is an M-Audio USB audio interface keyboard which is currently not on the list of supported devices. As plain text in the Windows executable suggests, the updater runs only once. Moreover, it runs only if it has detected an old version of the OS. Therefore I think there is at most one logging attempt, because it's not known whether an OS downgrade method exists. The log is essential to understand how data is organised on the device. It has soundbanks with sampled piano sounds and it is important to understand what format is used by M-Audio for samples in order to have a possibility to load instruments other than those shipped by the manufacturer. Thanks in advance, Vladimir -- 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