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I'm trying to configure my WNIC for 802.11a. According to lspci I have a: 03:00.0 Network controller: Intel Corporation Centrino Advanced-N 6205 (rev 34) According to iwlist it supports 32 ...
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  1. #1
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    Configure WIFI for 802.11a


    I'm trying to configure my WNIC for 802.11a. According to lspci I have a:
    03:00.0 Network controller: Intel Corporation Centrino Advanced-N 6205 (rev 34)

    According to iwlist it supports 32 channels:
    iwlist wlan0 frequency
    wlan0 32 channels in total; available frequencies :
    Channel 01 : 2.412 GHz
    Channel 02 : 2.417 GHz
    Channel 03 : 2.422 GHz
    Channel 04 : 2.427 GHz
    Channel 05 : 2.432 GHz
    Channel 06 : 2.437 GHz
    Channel 07 : 2.442 GHz
    Channel 08 : 2.447 GHz
    Channel 09 : 2.452 GHz
    Channel 10 : 2.457 GHz
    Channel 11 : 2.462 GHz
    Channel 36 : 5.18 GHz
    Channel 40 : 5.2 GHz
    Channel 44 : 5.22 GHz
    Channel 48 : 5.24 GHz
    Channel 52 : 5.26 GHz
    Channel 56 : 5.28 GHz
    Channel 60 : 5.3 GHz
    Channel 64 : 5.32 GHz
    Channel 100 : 5.5 GHz
    Channel 104 : 5.52 GHz
    Channel 108 : 5.54 GHz
    Channel 112 : 5.56 GHz
    Channel 116 : 5.58 GHz
    Channel 132 : 5.66 GHz
    Channel 136 : 5.68 GHz
    Channel 140 : 5.7 GHz
    Channel 149 : 5.745 GHz
    Channel 153 : 5.765 GHz
    Channel 157 : 5.785 GHz
    Channel 161 : 5.805 GHz
    Channel 165 : 5.825 GHz

    However when I go to set it anywhere in the 5 GHz band I get this error:
    iwconfig wlan0 mode ad-hoc
    iwconfig wlan0 freq 5.18G
    Error for wireless request "Set Frequency" (8B04) :
    SET failed on device wlan0 ; Invalid argument.
    iwconfig wlan0 channel 36
    Error for wireless request "Set Frequency" (8B04) :
    SET failed on device wlan0 ; Invalid argument.

    There are no new messages in /var/log/messages.
    With Mode:Managed there is no issue.
    There Mode:Ad-hoc and channels 1-11 are accepted by the iwlwifi driver.
    Any troubleshooting ideas would be very much appreciated.

    I'm using:
    Fedora 15 and have tried these kernels:
    2.6.38.6-26.rc1.fc15
    2.6.42.3-2.fc15
    2.6.42.9-1.fc15

  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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    Have you tried a newer driver? You can find them on the Intel web site.
    Sometimes, real fast is almost as good as real time.
    Just remember, Semper Gumbi - always be flexible!

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