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    SubjectRe: iwlagn is getting very shaky
    On Do, 20 Okt 2011, Johannes Berg wrote:
    > > [17409.616748] wlan0: direct probe to 00:24:c4:ab:bd:e0 (try 1/3)
    ..
    > > [17419.285141] iwlagn 0000:06:00.0: Encounter TX_STATUS_FAIL_PASSIVE_NO_RX, am I on 5.2G band? (0)
    > > [17419.286583] wlan0: deauthenticating from 00:24:c4:ab:bd:ef by local choice (reason=2)
    > > [17419.300296] cfg80211: Calling CRDA for country: JP
    > > [17419.309278] wlan0: authenticate with 00:24:c4:ab:bd:ef (try 1)
    > > [17419.310105] wlan0: authenticated
    > > [17419.317900] wlan0: associate with 00:24:c4:ab:bd:ef (try 1)
    >
    > It seems a bit like the 5 GHz AP (:e0) just fails, and wpa_supplicant
    > selects a 2.4 GHz AP (:ef) now? Pure conjecture, I guess the AP could
    > also be on the same channel -- did you have scan information for these
    > APs?

    BSS 00:24:c4:ab:bd:e0 (on wlan0)
    TSF: 8728607601135 usec (101d, 00:36:47)
    freq: 2412
    beacon interval: 102
    capability: ESS ShortPreamble ShortSlotTime (0x0421)
    signal: -62.00 dBm
    last seen: 6012 ms ago
    SSID: XXXXXX
    Supported rates: 1.0* 2.0* 5.5* 6.0 9.0 11.0* 12.0 18.0
    DS Parameter set: channel 1
    TIM: DTIM Count 0 DTIM Period 1 Bitmap Control 0x0 Bitmap[0] 0x0
    Country: JP Environment: Indoor/Outdoor
    Channels [1 - 13] @ 20 dBm
    ERP: Use_Protection
    HT capabilities:
    Capabilities: 0x182c
    HT20
    SM Power Save disabled
    RX HT20 SGI
    No RX STBC
    Max AMSDU length: 7935 bytes
    DSSS/CCK HT40
    Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
    Minimum RX AMPDU time spacing: 8 usec (0x06)
    HT RX MCS rate indexes supported: 0-15
    HT TX MCS rate indexes are undefined
    Extended supported rates: 24.0 36.0 48.0 54.0
    HT operation:
    * primary channel: 1
    * secondary channel offset: no secondary
    * STA channel width: 20 MHz
    * RIFS: 0
    * HT protection: non-HT mixed
    * non-GF present: 1
    * OBSS non-GF present: 0
    * dual beacon: 0
    * dual CTS protection: 0
    * STBC beacon: 0
    * L-SIG TXOP Prot: 0
    * PCO active: 0
    * PCO phase: 0
    WMM: * Parameter version 1
    * u-APSD
    * BE: CW 15-1023, AIFSN 3
    * BK: CW 15-1023, AIFSN 7
    * VI: CW 7-15, AIFSN 2, TXOP 3008 usec
    * VO: acm CW 3-7, AIFSN 2, TXOP 1504 usec


    And the one I am on:
    BSS 00:24:c4:ab:bd:ef (on wlan0) -- associated
    TSF: 8728558719143 usec (101d, 00:35:58)
    freq: 5200
    beacon interval: 102
    capability: ESS (0x0001)
    signal: -69.00 dBm
    last seen: 96 ms ago
    Information elements from Probe Response frame:
    SSID: XXXXXX
    Supported rates: 6.0* 9.0 12.0* 18.0 24.0* 36.0 48.0 54.0
    Country: JP Environment: Indoor/Outdoor
    Channels [36 - 64] @ 22 dBm
    HT capabilities:
    Capabilities: 0x186e
    HT20/HT40
    SM Power Save disabled
    RX HT20 SGI
    RX HT40 SGI
    No RX STBC
    Max AMSDU length: 7935 bytes
    DSSS/CCK HT40
    Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
    Minimum RX AMPDU time spacing: 8 usec (0x06)
    HT RX MCS rate indexes supported: 0-15
    HT TX MCS rate indexes are undefined
    HT operation:
    * primary channel: 40
    * secondary channel offset: below
    * STA channel width: any
    * RIFS: 1
    * HT protection: no
    * non-GF present: 1
    * OBSS non-GF present: 0
    * dual beacon: 0
    * dual CTS protection: 0
    * STBC beacon: 0
    * L-SIG TXOP Prot: 0
    * PCO active: 0
    * PCO phase: 0
    WMM: * Parameter version 1
    * u-APSD
    * BE: CW 15-1023, AIFSN 3
    * BK: CW 15-1023, AIFSN 7
    * VI: CW 7-15, AIFSN 2, TXOP 3008 usec
    * VO: acm CW 3-7, AIFSN 2, TXOP 1504 usec


    No idea if that helps you.

    Best wishes

    Norbert
    ------------------------------------------------------------------------
    Norbert Preining preining@{jaist.ac.jp, logic.at, debian.org}
    JAIST, Japan TeX Live & Debian Developer
    DSA: 0x09C5B094 fp: 14DF 2E6C 0307 BE6D AD76 A9C0 D2BF 4AA3 09C5 B094
    ------------------------------------------------------------------------
    SCREGGAN (n. banking)
    The crossed-out bit caused by people putting the wrong year on their
    cheques all through January.
    --- Douglas Adams, The Meaning of Liff


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