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Thread: unable to enumerate USB device (ft232r)

  1. #11
    Join Date
    Mar 2008
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    UK
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    Ubuntu 14.04 Trusty Tahr

    Re: unable to enumerate USB device (ft232r)

    Just to close down this thread. The problem turned out to be a faulty USB device on the Rainbowduino, not my first thought but it happens. The vendor (Cool Components) were quick to respond and I am now up and running.

    I took the extra helpfull advice from Matt_Symes and executed
    sudo modprobe ftdi_sio
    to load up the driver into the kernel and that was all it took.

  2. #12
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    Re: unable to enumerate USB device (ft232r)

    Hi

    Quote Originally Posted by hundred1906 View Post
    Just to close down this thread. The problem turned out to be a faulty USB device on the Rainbowduino, not my first thought but it happens. The vendor (Cool Components) were quick to respond and I am now up and running.

    I took the extra helpfull advice from Matt_Symes and executed to load up the driver into the kernel and that was all it took.
    Nicely done ! I'm glad you fixed it

    It sounds like a very interesting project. Have fun with it.

    Kind regards
    Join us on irc at #ubuntuforums. For web chat see here

    If you believe everything you read, you better not read. ~ Japanese Proverb

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  3. #13
    Join Date
    Jun 2007
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    New Zealand
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    Ubuntu 12.04 Precise Pangolin

    Re: unable to enumerate USB device (ft232r)

    I had the exact same problem trying to connect my Seeeduino on Ubuntu 12.04... turn out to be a bad USB cable!!

  4. #14
    Join Date
    Mar 2013
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    3

    Re: unable to enumerate USB device (ft232r)

    I have similar problem. My syslogs are getting filled with message:[11670.968036] hub 4-0:1.0: unable to enumerate USB device on port 2
    [11671.216038] hub 4-0:1.0: unable to enumerate USB device on port 2
    [11671.464036] hub 4-0:1.0: unable to enumerate USB device on port 2
    [11671.712038] hub 4-0:1.0: unable to enumerate USB device on port 2
    [11671.960038] hub 4-0:1.0: unable to enumerate USB device on port 2
    [11672.208037] hub 4-0:1.0: unable to enumerate USB device on port 2
    [11672.456038] hub 4-0:1.0: unable to enumerate USB device on port 2
    [11672.704037] hub 4-0:1.0: unable to enumerate USB device on port 2



    I tried with a different cable also. still the same. I am using FT2232D in debian squeeze. The device is working properly in a Windows machine.

  5. #15
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    Re: unable to enumerate USB device (ft232r)

    Hi

    Try this. Unplug the device and open a terminal and type

    Code:
    echo -1 | sudo tee /sys/module/usbcore/parameters/autosuspend
    Plug the device back in. Is it recognised ?

    Also unplug your Ubuntu machine so it is totally disconnected from any power. If it's a laptop also remove the battery.

    Lean for 10 minutes. Plug the machine back in and start up Ubuntu. Plug the device back in. Is it recognised?

    I have to be honest, i don't expect either of these ideas to work in your case but it is always worth trying.

    Kind regards
    Join us on irc at #ubuntuforums. For web chat see here

    If you believe everything you read, you better not read. ~ Japanese Proverb

    Do not read newspapers on an empty stomach ~ Russian Proverb ~ BrunoLotse

  6. #16
    Join Date
    Mar 2013
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    Re: unable to enumerate USB device (ft232r)

    Thanks for the response. But it dint work out. I tried autosuspend, old_scheme_first, rmmod ehci_hcd... everything without success. It is working in a windows xp machine. so definitely the problem is not with the device. The system is unable to detect the usb device at all. lsusb and lspci returns nothing relevant and dmesg n syslog full with unable to enumerate messages.
    Hitting my head!

  7. #17
    Join Date
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    Re: unable to enumerate USB device (ft232r)

    Hi

    ....rmmod ehci_hcd....
    That command will not work under Ubuntu anymore. You have to unbind the driver in sysfs instead, but you will lose USB2 capability on that port. However, i'm not sure if that is your problem.

    Can you explain exactly your setup. what do you have connected in that port ? What type of port (USB 1, 2 or 3) ?

    Post the output of...

    Code:
    dmesg | grep -i -E "usb|hci_hcd"
    You have tried all the ports ? Are you using a USB hub ? If so, is the hub powered or not ?

    Are you dual booting windows on the same PC ? If so, are you using the same USB port as from windows ? (This is an important couple of questions).

    If the windows box is a different PC, have you tried to see if it is recognised from a LiveCD/USB on the windows box when plugged into the same port that windows works with ?

    Kind regards
    Last edited by matt_symes; March 22nd, 2013 at 11:45 AM.
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    If you believe everything you read, you better not read. ~ Japanese Proverb

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  8. #18
    Join Date
    Mar 2013
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    3

    Re: unable to enumerate USB device (ft232r)

    Hi,

    I tried both rmmod ehci_hcd and unbinding all ehci devices.
    I am using USB 2. Its a powered hub.

    The Windows box is a different PC. And I tried other two Linux machines also.
    In one machine its working perfectly. But not in the second, even though both having same configuration.

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