1

If I connect a USB device, such as a memory stick, how can I see what USB standard the device supports, and what standard is being used at the moment?

Does the device support USB 2.0? 3.0? What is being used?

How can I attempt to force USB 3.0 over 2.0? Some devices that should support 3.0 appear to run at 2.0 speed.

1 Answer 1

0

To answer the first part of your question, the tool lsusb can help you get more information about your USB devices. If you run lsusb -v, locate your device, and check the 'bcdUSB' field in the device descriptor which will tell you what version of the USB specification the device conforms to.

In terms of the second part, how to force USB 3 over USB 2, I'm not sure I understand what you mean. USB 3 devices should automatically be backwards compatible and just work over USB 2 but at slower speeds. If you mean if you can force a USB 2 device to become a USB 3 device, to work at higher speeds, then the answer will be no.

1
  • Thanks for your answer. I meant rather, how can I ensure a USB 3.0 device actually operates at 3.0? Sometimes I see USB 3.0 devices only working at 2.0 speeds, then after reconnecting it, it might work at 3.0. Is there some auto-negotiation that determines what speed will mostly likely work? If it is possible to influence or even override this, then that would be awesome. Feb 22, 2020 at 17:07

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.