I have an old Thinkpad R32 2658 and I want to use dfu-util. The reference documentation starts with the following description:

To run dfu-util, you need to have /proc/bus/usb mounted and working. The terminal command "ls /proc/bus/usb" should return something similar to, "001 002 003 004 005 devices", it shouldn't be empty. If it is empty, use this command: sudo mount -t usbfs usbfs /proc/bus/usb

The problem is: I don't have /proc/bus/usb at all. In /proc/bus there are only input and pci sub-directories. But I do have USB ports on my old notebook and my USB keys work well.

What can I do?

  • Can you please take a look at this forum entry and report if this works for you? Please note, the author of the answer states that this is not a long-term solution.
    – bender
    Jan 17, 2013 at 22:29
  • Find a tool that supports sysfs instead. Jan 17, 2013 at 22:33
  • @bender: thanks for the link! This is a workaround that works for me as well :) I hope it won't cause any further problems when using dfu-util, but for now it looks good, thanks again!
    – Wolfson
    Jan 19, 2013 at 11:38
  • Could you then please write an official answer to your own question for the sake of documentation? And after a day you even will be able to accept your own answer.
    – bender
    Jan 19, 2013 at 14:48
  • @bender: ok, sorry, I did not know how that works, that was my first question here ;)
    – Wolfson
    Jan 19, 2013 at 18:52

2 Answers 2


Not strictly a solution but a workaround that worked for the author of the question is available in this forum entry.

Please note, the author of the answer above states that this is not a long-term solution.


In 12.04 (and perhaps before), /usb/bin/usb-devices is a script that provides similar info.

  • Not in 13.04, doubtful in later releases.
    – Braiam
    Oct 29, 2013 at 19:06

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