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Accepted
Fake4d
Asked: 2009-12-23 06:21:34 +0800 CST

How to determine USB Version 1.1 or 2.0

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I have got a Ubuntu server 9.10 system with a USB storage attached.

It works very, very slow. Is there a command to test whether it's 1.1 or 2.0 usb?

How can I find out?

linux

3 Answers

  1. Best Answer

    Plug your device in, then see syslog:

    $ tail -n 2 /var/log/syslog
    Dec 22 17:25:14 localhost kernel: [73348.931267] usb 2-3: new high speed USB device using ehci_hcd and address 13
    Dec 22 17:25:14 localhost kernel: [73349.084555] usb 2-3: configuration #1 chosen from 3 choices

    Note the device bus id there: usb 2-3. Now get the version:

    $ cat /sys/bus/usb/devices/2-3/version
    2.00

    Cheers! :)

    • 21

  2. you can use

    lsusb -v

    a simple way.

    you should install usbutils first

    • 2

  3. I highly recommend this app (System Profiler and Benchmark)easy install and easy to understand device management window. Device Manager

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