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Hi, I am using 2.6.30 on AT91SAM9G45 ARM board. USB is getting disconnected and connect again with following given kernel debug. hub 1-0:1.0: state 7 ports 2 chg 0000 evt ...
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  1. #1
    Just Joined!
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    USB connect disconnect


    Hi,
    I am using 2.6.30 on AT91SAM9G45 ARM board. USB is getting disconnected and connect again with following given kernel debug.

    hub 1-0:1.0: state 7 ports 2 chg 0000 evt 00004
    atmel-ehci atmel-ehci: GetStatus port2 status 001002 POWER sig=se0 CSC
    hub 1-0:1.0ort 2, status 0100, chage 0001, 12 Mb/s
    usb 1-2: USB disconnect, address 2
    usb 1-2: Unregistering device
    usb 1-2: usb_disable_device numing all URBs
    usb 1-2: unregistering interface 1-2:1.0
    usb 1-2: 1.0: uevent
    usb 1-2: uevent
    atmel-ehci atmel-ehci: GetStatus port2 status 001803 POWER sig=j CSC CONNECT

    .........
    Help me out from this problem.
    Regards,
    Ashish Joshi.

  2. #2
    Linux Guru Rubberman's Avatar
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    I can be found either 40 miles west of Chicago, in Chicago, or in a galaxy far, far away.
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    Bad cable, bad connector, bad port, flaky device? Have you tried replacing the cable, moving the device to another port? What about other USB devices?
    Sometimes, real fast is almost as good as real time.
    Just remember, Semper Gumbi - always be flexible!

  3. #3
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    USB connect disconnect

    USB device is directly connected to host, no cable is there. This problem is coming in all three system. USB connect disconnect happens any time, some time it takes four to five days. When this happens the voltage level on D+ goes to 3.1V from 0.004volts. May be the problem when usb leave suspend mode?

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  5. #4
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    Ashish,

    Just ran across your post from two years ago... I'm experiencing the exact same problem, with the same processor (though you were likely running Rev A, and we're on Rev B of the 9G45). I wanted to ask, did you find resolution to the problem you were experiencing?

    Also, were you using a SMSC USB hub? The 2517 by chance?

    Mark

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