On Tue, 3 May 2016, Susmita/Rajib Bandopadhyay wrote: > Sir, > The same goes for Debian Squeeze, no directories /usb/usbmon/1u under > /sys/kernel/debug > debug directory is empty, without hidden files. Ah, okay. This means before running the test, you have to do this: sudo mount -t debugfs none /sys/kernel/debug I thought Knoppix and Debian did this for you automatically. 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