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Thread: Centrino Wireless-N + WiMAX 6150 recognizes Wifi but doesn't connect

  1. #21
    Join Date
    Aug 2005
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    South Carolina, USA
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    Ubuntu 14.04 Trusty Tahr

    Re: Centrino Wireless-N + WiMAX 6150 recognizes Wifi but doesn't connect

    Let's try another driver parameter. Please do:
    Code:
    sudo modprobe -r iwlwifi
    sudo modprobe iwlwifi swcrypto=1
    If this does not help and if you are unable or unwilling to change the router to WPA2 only, I have no further suggestions.
    "Oh, Ubuntu, you are my favorite Linux-based operating system" --Dr. Sheldon Cooper, Ph.D.

  2. #22
    Join Date
    Jun 2012
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    Re: Centrino Wireless-N + WiMAX 6150 recognizes Wifi but doesn't connect

    Sorry for the radio silence, but I've actually managed to track down two different unix admins at my college.

    After some tinkering, they changed my
    Code:
    cat /etc/modprobe.d/iwlwifi.conf
    to read

    Code:
    options iwlwifi bt_coex_active=0
    and then they changed my network certificate, so now it works.
    I'm able to connect to wifi now.
    They think that it was a combination of the iwlwifi.conf and the network certificate that was causing my issues.

    Thank you so much for the help, chili555

  3. #23
    Join Date
    Aug 2005
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    Re: Centrino Wireless-N + WiMAX 6150 recognizes Wifi but doesn't connect

    and the network certificate that was causing my issues.
    My suspicion as well. Glad it's working in any event.
    "Oh, Ubuntu, you are my favorite Linux-based operating system" --Dr. Sheldon Cooper, Ph.D.

  4. #24
    Join Date
    Oct 2012
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    14

    Re: Centrino Wireless-N + WiMAX 6150 recognizes Wifi but doesn't connect

    I really hate to bump an old post, but I'm have the exact same problem as the poster here, but I'm not sure how to change the line of code below or how to change the network certificate...Can a noob get a bit of help?

    Quote Originally Posted by 42th View Post
    Sorry for the radio silence, but I've actually managed to track down two different unix admins at my college.

    After some tinkering, they changed my
    Code:
    cat /etc/modprobe.d/iwlwifi.conf
    to read

    Code:
    options iwlwifi bt_coex_active=0
    and then they changed my network certificate, so now it works.
    I'm able to connect to wifi now.
    They think that it was a combination of the iwlwifi.conf and the network certificate that was causing my issues.

    Thank you so much for the help, chili555

  5. #25
    Join Date
    Aug 2005
    Location
    South Carolina, USA
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    20,119
    Distro
    Ubuntu 14.04 Trusty Tahr

    Re: Centrino Wireless-N + WiMAX 6150 recognizes Wifi but doesn't connect

    The network certificate is set by the usually corporate or university network you are trying to connect to. Is that what you need?

    Do you have the same network card? What are your symptoms?
    "Oh, Ubuntu, you are my favorite Linux-based operating system" --Dr. Sheldon Cooper, Ph.D.

  6. #26
    Join Date
    Oct 2012
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    Re: Centrino Wireless-N + WiMAX 6150 recognizes Wifi but doesn't connect

    Yes, the same wireless card, with the same symptoms. It will never connect, just keep popping up the screen where you put the network key in.

    This happens trying to access the network at my house. I haven't tried it anywhere else, but I'm pretty sure it would have the same symptoms.

  7. #27
    Join Date
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    Re: Centrino Wireless-N + WiMAX 6150 recognizes Wifi but doesn't connect

    These will be experimental. They disappear on reboot. The purpose is to find the one driver parameter that works and then apply it to a conf file permanently. Please try:
    Code:
    sudo modprobe -r iwlwifi
    sudo modprobe iwlwifi 11n_disable=1
    As the eye doctor says, better, worse or the same? Next try:
    Code:
    sudo modprobe -r iwlwifi
    sudo modprobe iwlwifi bt_coex_active=N
    Any change? Of course, you could try both:
    Code:
    sudo modprobe -r iwlwifi
    sudo modprobe iwlwifi 11n_disable=1 bt_coex_active=N
    "Oh, Ubuntu, you are my favorite Linux-based operating system" --Dr. Sheldon Cooper, Ph.D.

  8. #28
    Join Date
    Oct 2012
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    Re: Centrino Wireless-N + WiMAX 6150 recognizes Wifi but doesn't connect

    I keep getting the following after the first line, I've tried with the wireless enabled and disabled...

    Code:
    kandj@kandj-U56E:~$ sudo modprobe -r iwlwifi
    FATAL: Module iwlwifi is in use.
    When I put the second line in, it just does the following.

    Code:
    kandj@kandj-U56E:~$ sudo modprobe iwlwifi 11n_disable=1 
    kandj@kandj-U56E:~$
    Am I doing something wrong?

  9. #29
    Join Date
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    Ubuntu 14.04 Trusty Tahr

    Re: Centrino Wireless-N + WiMAX 6150 recognizes Wifi but doesn't connect

    Please try:
    Code:
    sudo ifconfig wlan0 down
    sudo modprobe -r iwlwifi
    If there are no errors, proceed:
    Code:
    sudo modprobe iwlwifi 11n_disable=1
    sudo ifconfig wlan0 up
    Better?
    "Oh, Ubuntu, you are my favorite Linux-based operating system" --Dr. Sheldon Cooper, Ph.D.

  10. #30
    Join Date
    Sep 2011
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    Talking Re: Centrino Wireless-N + WiMAX 6150 recognizes Wifi but doesn't connect

    My issue with this card was that it would not reconnect to the network after suspending the laptop (authentication issue). I had tried to remove the module and insert it again with no luck (which used to work). After many attempt at a repair I googled my issue and stumbled onto this thread. I will report that the method the corrected my issue was running the command "sudo gedit /etc/modprobe.d/iwlwifi.conf" and adding "options iwlwifi bt_coex_active=0" to the file. Thank your network administrators for me. Now i can say I love to use Ubuntu with this laptop HP dv7 6135dx. It works PERFECTLY on 12.04.

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