On Sun, 12 Mar 2017, Dave Mielke wrote: > [quoted lines by Alan Stern on 2017/03/12 at 17:18 -0400] > > >Interesting. This is a high-speed device that mistakenly uses the > >low/full-speed encoding for an interrupt bInterval value? > > Yes. > > >That's pretty unusual. Most HID devices (which includes the Braille > >devices I have heard of) run at low speed, and a few of them run at > >full speed. I can't remember any running at high speed. > > According to my collection of data, 5 say 1.00, 15 say 1.1, and 21 say 2.0. A device's speed is only partially related to its USB version. A USB-1.1 device can run at low speed or full speed. A USB-2 device can run at low, full, or high speed. And a USB-3 device can run at low, full, high, or Super speed. 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
