Ubuntu 12.04 no wireless extensions

Discussion in 'Linux Ubuntu' started by garouch, Jan 27, 2014.

  1. garouch

    garouch New Member

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    I have got a big problem with my udoo quad. Suddenly after a boot my Ubuntu 12.04 does not detect my
    wifi interface.

    iwconfig

    lo no wireless extensions
    eth4: no wireless extensions
    usb0: no wireless extensions

    Please help me. It is important.
     
  2. garouch

    garouch New Member

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    I tried to reinstall the system, but the problem remains.
    Is it a hardware problem ?

    Please help me.

    Thanks
     
  3. delba

    delba Administrator Staff Member

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    Try to remove and reinsert the wifi module (it's just a screw behind the board). Let me know if everything got fixed after that.
     
  4. garouch

    garouch New Member

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    Thanks delba.
    I tried what you said twice, but nothing change.

    Another idea ?
     
  5. garouch

    garouch New Member

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    No answer ?
    What is the name of the Ubuntu module load to manage wireless device ?

    lsmod:
    vivante
    drm
    nfsd
    exportfs

    lspci and
    lshw -C network

    give me nothing

    Thanks
     
  6. garouch

    garouch New Member

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    No answer ?
    It is really important for me.

    Thanks
     
  7. garouch

    garouch New Member

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    When i look in dmesg, it seems that the wireless is managed by cfg80211.
    Why it does not appear in lsmod as in my PC ?
    Is it due to the Udoo boot method ?
     
  8. garouch

    garouch New Member

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    After a lsusb in another Udoo quad where wireless seems to work i got this information aboout the wireless device

    Bus 002 Device 003: ID 148f:5370 Ralink Technology, Corp. RT5370 Wireless Adapter

    After a dmesg | grep -i rt2 in thesame Udoo quad, i got

    [ 1.760324] usbcore: registered new interface driver rt2800usb
    [ 3.007215] Registered led device: rt2800usb-phy0::radio
    [ 3.007355] Registered led device: rt2800usb-phy0::assoc
    [ 3.007489] Registered led device: rt2800usb-phy0::quality

    So, it seems that the module which manages the wireless device is rt2800usb.

    Then, i went back to my platform which does not work.

    lsusb give me
    Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
    Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
    no informations about wireless

    dmesg | grep -i rt2
    [ 1.739847] usbcore: registered new interface driver rt2800usb
    no registered led device

    I tried to load rt2800usb with modprobe -v rt2800usb
    the command runs without an error and lsmod does not change

    Module Size Used by
    vivante 943 1
    drm 141896 2 vivante
    nfsd 62470 0
    exportfs 3032 1 nfsd

    What does that mean ?
    The hardware is it broken ? How can i do to really load rt2800usb module ?

    Please, Udoo Designer, help me to understand what really happen.

    Thanks.
     
  9. delba

    delba Administrator Staff Member

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    A couple of things just to be sure is the problem is the Wifi Module ore the Board:

    - Switch the sd cards between the 2 UDOOs and see if something changes.
    - Switch the wifi modules. If the new wifi module works you have functioning board (and a broken wifi module) while if it doesn't you have a broken board.

    In both cases you should open a ticket in our customercare section and ask for a RMA of your damaged UDOO: http://www.udoo.org/customer-care/
     
  10. garouch

    garouch New Member

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    Thanks delba,

    - switching sd cards between the 2 Udoo: nothing changes

    - switching the wireless module from the working to not working Udoo: nothing changes

    - switching the wireless module from not working to working Udoo: works

    conclusion: the board is broken.
     
  11. delba

    delba Administrator Staff Member

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