On Fri, 2 Dec 2011, Vane, Edwin wrote: > I found the post that Greg mentioned about turning power off to ports > (http://article.gmane.org/gmane.linux.usb.general/30383) but it > doesn't seem to make any difference to the attached device until I > use Simon's command for unbinding the driver: > > echo -n '1-7' > /sys/bus/usb/drivers/usb/unbind > > The post mentions that the 'hubpower' program should cause the driver > to be unbound when issuing ioctl requests so I'm not sure what the > difference is between that kind of unbind and whatever the above > 'echo' command does. Is 1-7 the attached device, or is it the hub the device is plugged into? > However, I did notice that using the above command, even without > 'hubpower' will cause 'lsusb -t' to segfault when run afterward. Is > there something unsavoury about using the above echo command? Could > you offer some insight into the behaviour I'm seeing? There's nothing wrong with this command. But did you try using the commands I suggested? 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
