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Thread: iwlwifi driver still not working properly for 802.11n

  1. #1
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    iwlwifi driver still not working properly for 802.11n

    The iwlwifi driver is still not working properly for 802.11n. It may or may not work initially. If and when it works, the wireless connection will not resume after a suspend. The only way I have found to work around this problem is to disable the "n" option by creating a file:

    /etc/modprobe.d/iwlwifi

    which contains the following two lines:

    options iwlwifi bt_coex_active=0
    options iwlwifi 11n_disable=1

    (I don't know wheher the first line is necessary, comment please)

    Does anyone know if there is any progress regarding this problem?

  2. #2
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    Re: iwlwifi driver still not working properly for 802.11n

    I have no problems with connecting via wireless N, connection dropping or not reconnecting after suspend, but ever since kernel 3.8 I can only get a max of 144mbit on my wireless n (if I downgrade to 3.7 or previous I get 300)
    Desktop: Windows 8 x64 | Intel Core i5-2500 | 16 GB DDR3 1333 | ATI 6950 2gb | 64gb Vertex 2/320gb/750gb/1tb hdd
    Laptop: System76 Lemur Ultra | Xubuntu 13.04 x64 | 2.5Ghz Intel Core i5-3210m | 8GB DDR31600 | Intel HD4000 | 500GB 7200rpm hybrid hdd

  3. #3
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    Re: iwlwifi driver still not working properly for 802.11n

    My wireless chip is Intel Centrino:

    ubuntu@h17:~$ lspci | grep Network
    07:00.0 Network controller: Intel Corporation Centrino Wireless-N + WiMAX 6150 (rev 67)

    What is yours?

  4. #4
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    Re: iwlwifi driver still not working properly for 802.11n

    Quote Originally Posted by ping-wu View Post
    My wireless chip is Intel Centrino:

    ubuntu@h17:~$ lspci | grep Network
    07:00.0 Network controller: Intel Corporation Centrino Wireless-N + WiMAX 6150 (rev 67)

    What is yours?
    02:00.0 Network controller: Intel Corporation Centrino Advanced-N 6235 (rev 24)
    Desktop: Windows 8 x64 | Intel Core i5-2500 | 16 GB DDR3 1333 | ATI 6950 2gb | 64gb Vertex 2/320gb/750gb/1tb hdd
    Laptop: System76 Lemur Ultra | Xubuntu 13.04 x64 | 2.5Ghz Intel Core i5-3210m | 8GB DDR31600 | Intel HD4000 | 500GB 7200rpm hybrid hdd

  5. #5
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    Re: iwlwifi driver still not working properly for 802.11n

    Quote Originally Posted by screaminj3sus View Post
    02:00.0 Network controller: Intel Corporation Centrino Advanced-N 6235 (rev 24)
    Ha, same Intel Centrino but actually different versions of Centrino chips, that might explain why the different behavior.

    I have noticed that different routers can also different wifi behavior. My router is Linksys E2500, which actually works better than a previous router (D-LINK DIR655).

  6. #6
    Join Date
    Oct 2010
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    Re: iwlwifi driver still not working properly for 802.11n

    Are you using a PCI wifi-adapter or USb wifi-adapter?
    My personal opinion is to setup a powerline, that way you can just plugin your powerline adapter(has to be an actual outlet) and use a regular ethernet cable. You'll get more consistent speeds.

  7. #7
    Join Date
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    Re: iwlwifi driver still not working properly for 802.11n

    Quote Originally Posted by Rukiri View Post
    Are you using a PCI wifi-adapter or USb wifi-adapter?
    My personal opinion is to setup a powerline, that way you can just plugin your powerline adapter(has to be an actual outlet) and use a regular ethernet cable. You'll get more consistent speeds.
    Ok thanks...
    And I complete your personal opinion with https://bugs.launchpad.net/ubuntu/+s...x/+bug/1112652 .


    I use 6205 chip. I experience some slowness with N mode and weak signal (ok with BG mode), but no other issue. Maybe the band frequency does matter (2.4 or 5 GHz) ?
    If I set my router to use BG mode only, I do not need some module tweaking.

    There are a lot of novelties with kernel 3.9 against iwlwifi. We maybe benefit some backports...

  8. #8
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    Re: iwlwifi driver still not working properly for 802.11n

    Quote Originally Posted by Rukiri View Post
    Are you using a PCI wifi-adapter or USb wifi-adapter?
    My personal opinion is to setup a powerline, that way you can just plugin your powerline adapter(has to be an actual outlet) and use a regular ethernet cable. You'll get more consistent speeds.
    I have done away with desktop PCs, and I don't use a USB wifi-adapter, all my notebooks are using PCI wifi-adapter.

    Ideally, we shouldn't use wifi. My house is extensively wired with ethernet cable; thus I really don't need to use wifi. However, most people do not have this luxury. Almost everyone I know (and each of them represents as a potential Ubuntu user) uses wifi. For me, their interests trump mine.

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