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Thread: [SOLVED] device descriptor read/64, error -71 - USB problem

  1. #11
    Join Date
    Apr 2006
    Beans
    13

    Re: [SOLVED] device descriptor read/64, error -71 - USB problem

    what if i do this :

    sudo echo Y > /sys/module/usbcore/parameters/old_scheme_first

    and get this:

    bash: /sys/module/usbcore/parameters/old_scheme_first: Permission denied

  2. #12
    Join Date
    Aug 2007
    Location
    Paris
    Beans
    5,538
    Distro
    Ubuntu 11.04 Natty Narwhal

    Re: [SOLVED] device descriptor read/64, error -71 - USB problem

    Quote Originally Posted by jmiguel77 View Post
    what if i do this :

    sudo echo Y > /sys/module/usbcore/parameters/old_scheme_first

    and get this:

    bash: /sys/module/usbcore/parameters/old_scheme_first: Permission denied
    The problem is that the second command (into which the first is being redirected using the > operator) isn't being run as root. Try this:

    Code:
    echo Y | sudo tee /sys/module/usbcore/parameters/old_scheme_first
    That should work.

  3. #13
    Join Date
    Mar 2008
    Beans
    4

    Re: [SOLVED] device descriptor read/64, error -71 - USB problem

    I just encountered this USB error on 10.04. Simultaneously, my X would not boot. I noticed "vga16fb" had somehow snuck into the system ... it was missing from etc modprobe.d framebuffer blacklist.

    I after adding vga16fb to the blacklist file I have both X and usb functionality again.

    DISABLE ALL FRAMEBUFFER MODULES.

    lsmod | grep fb


    Hope this helps.
    dortmann31415@yahoo.com

  4. #14
    Join Date
    Feb 2008
    Beans
    22

    Re: [SOLVED] device descriptor read/64, error -71 - USB problem

    Quote Originally Posted by pytheas22 View Post
    The problem is that the second command (into which the first is being redirected using the > operator) isn't being run as root. Try this:

    Code:
    echo Y | sudo tee /sys/module/usbcore/parameters/old_scheme_first
    That should work.
    Fixed my problem with a Mac borked HDD that would not mount.

    thanks

  5. #15
    Join Date
    Jan 2007
    Beans
    10

    Re: device descriptor read/64, error -71 - USB problem

    Quote Originally Posted by toni_uk View Post
    hey guys, just put a clean install of Ubuntu back on my computer and of course had the same problem with the USB/Camera. Did a bit of research and found this so damn easy solution on the Mint Forum:

    in the terminal type: echo -1 >/sys/module/usbcore/parameters/autosuspend

    I was logged in as root - not sure whether necessary. Then just reboot and Bob's your Uncle.

    Worked a treat for me.
    Very old thread, but this is still very applicable. I have some devices that would not connect and this fixed it.

    The old value was 2 (seconds).

    Here is some documentation for some of the other values that can be configured:
    Code:
    usbcore.autosuspend=
    		[USB] The autosuspend time delay (in seconds) used
    		for newly-detected USB devices (default 2).  This
    		is the time required before an idle device will be
    		autosuspended.  Devices for which the delay is set
    		to a negative value won't be autosuspended at all.
    
    usbcore.usbfs_snoop=
    		[USB] Set to log all usbfs traffic (default 0 = off).
    
    usbcore.blinkenlights=
    		[USB] Set to cycle leds on hubs (default 0 = off).
    
    usbcore.old_scheme_first=
    		[USB] Start with the old device initialization
    		scheme (default 0 = off).
    
    usbcore.use_both_schemes=
    		[USB] Try the other device initialization scheme
    		if the first one fails (default 1 = enabled).
    	
    usbcore.initial_descriptor_timeout=
    		[USB] Specifies timeout for the initial 64-byte
                    USB_REQ_GET_DESCRIPTOR request in milliseconds
    		(default 5000 = 5.0 seconds).

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