On Sat, 28 Aug 2010, Artem Makhutov wrote: > It is much harder to reproduce the problem when no hubs are in use. > What is the big deal in not using hubs? There are several reasons. First, not having the extra hardware removes a whole class of possible causes of errors. Second, not having the hubs makes the logs easier to follow since they won't contain a lot of uninteresting extra entries. Third, without the hubs you won't be able to connect as many modems, which again makes the logs easier to follow. Fourth, without the high-speed hubs the modems will have to connect to a full-speed USB-1.1 controller instead of a high-speed USB-2.0 controller, removing yet another possible source of errors and complexity. 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