Re: [Madwifi-users] sometimes it works, sometimes it doesn't

[Trevor A. <t_a...@ya...>]

Is it possible the AP is 802.11b?

--- Geoffrey Young <ge...@mo...> wrote:

> Pavel Roskin wrote:
> > Hello!
> 
> :)
> 
> thanks for taking the time to help.  this has been driving me crazy for
> a few days now - no point in a laptop without wireless :)
> 
> anyway, I'm at that cafe now and on #madwifi (geoff)... at least for a
> while :)
> 
> > Can it be that the drive is locked to 802.11b for some reason?  Please
> > see the output of iwconfig.  Also see the kernel log for the messages
> > from the driver.
> 
> 
> I enabled kernel debugging with 80211debug (0xffffffff), which produced
> a ton of output.  I'm not sure which you are interested in.
> 
> as for iwconfig
> 
> # iwconfig ath0
> ath0      IEEE 802.11g  ESSID:"PANERA"
>           Mode:Managed  Frequency:2.412 GHz  Access Point: Not-Associated
>           Bit Rate:1 Mb/s   Tx-Power:8 dBm   Sensitivity=0/3
>           Retry:off   RTS thr:off   Fragment thr:off
>           Encryption key:off
>           Power Management:off
>           Link Quality=30/94  Signal level=-65 dBm  Noise level=-95 dBm
>           Rx invalid nwid:1727  Rx invalid crypt:0  Rx invalid frag:0
>           Tx excessive retries:0  Invalid misc:0   Missed beacon:0
> 
> 
> > 
> > Use "iwlist scan" to see if the access point is available.  You'll also
> > see some other information, such as the rates and whether WEP is needed.
> 
> # iwlist ath0 scan
> ath0      Scan completed :
>           Cell 01 - Address: 00:02:2D:A9:70:65
>                     ESSID:"PANERA"
>                     Mode:Master
>                     Frequency:2.412 GHz (Channel 1)
>                     Quality=30/94  Signal level=-65 dBm  Noise level=-95 dBm
>                     Encryption key:off
>                     Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s
>                     Extra:bcn_int=100
>           Cell 02 - Address: 00:16:B6:10:C9:61
>           [not the one I'm interested in]
> 
> 
> >>where the ifup process dies is on dhcp
> >>
> >>  Nov 15 10:53:16 jib dhclient: DHCPREQUEST on ath0 to 255.255.255.255
> >>  Nov 15 10:53:30 jib dhclient: DHCPDISCOVER on ath0 to 255.255.255.255
> >>port 67 interval 7
> > 
> > 
> > Don't even try that before you see an AP in the iwconfig output.
> 
> ok, that's just part of the if up process on fedora.
> 
> to that end
> 
> # iwconfig ath0 ap 00:02:2D:A9:70:65
> 
> has no effect on the output of iwconfig - still no access point associated.
> 
> >>anyway, I've seen this exact thing show up a few times in google, but it
> >>always seems to be associated with WEP, which I'm not using anywhere
> >>(home is MAC filtered, and the free wifi is completely open).
> > 
> > 
> > Make sure it's open by doing the scan.
> > 
> > 
> >>0b:02.0 Ethernet controller: Atheros Communications, Inc. AR5212
> >>802.11abg NIC (rev 01)
> >>
> > 
> > Make sure you are not in the 802.11a band by any chance.
> 
> I don't exactly know how to do that.
> 
> --Geoff
> 
> 
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