On Tue, May 15, 2012 at 11:24 AM, Greg KH <greg@xxxxxxxxx> wrote: > On Mon, May 14, 2012 at 11:31:51PM -0400, Russell Nelson wrote: >> On Mon, May 14, 2012 at 6:56 PM, Greg KH <greg@xxxxxxxxx> wrote: >> >> > Again the usb-serial generic device is a very dumb, slow device, with no >> > line settings at all. It's ment for testing and one-off prototypes, not >> > for "real" devices in any way. >> >> Okay, I am *seriously* confused, then, because I've seen instructions >> on the 'net that used to work which tell me to modprobe usbserial with >> a vendor and product number. Is "usb-serial not a functioning driver" >> new information that I missed? > > Yes, and all of that is wrong and written by people who have no idea > what they are doing. Oh dear. I'm wondering why that wasn't obvious to me. Should it have been? Maybe Bjørn has a good idea? >> Maybe when it creates its entry in >> /sys/bus/usb-serial/drivers/generic/ it should say "testing" instead >> of "generic", because "generic" implies to me that it's going to work >> with just about anything. You know, like generic drugs. > > True, but it's too late now, and it's not like changing that will make > anyone realize the problem. Isn't "generic" just an internal name? If it's misleading, maybe it would be *better* to break it. So .... since my device is an FTDI, I tried modprobe ftdi_sio product=0xcc60 and that worked a champ. I then tried echo 0x0403 0xcc60 >/sys/bus/usb-serial/drivers/ftdi_sio/new_id and *that* worked also. It seems that it only doesn't work on the usbserial driver, as described here: http://www.spinics.net/lists/linux-usb/msg46670.html Sounds like there's some interaction between usbserial's policy of only supporting one vendor/product pair and new_id, which causes the latter to not work at all. It looks like a Google search for "modprobe usbserial vendor" is useful in finding the miscreant advice. In particular, this page: http://wiki.debian.org/usbserial looks like a farrago of wrongness. -- 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
